1 c) AC & DC input signal If the two inputs of a differential amplifier were to be shorted together (thus ensuring zero potential difference between them), there should be no change in output voltage for any amount of voltage applied between those two shorted inputs and ground: Voltage that is common between either of the inputs and ground, as “Vcommon-mode” is in this case, is called common-mode voltage. View Answer, 7. h�bbd```b``>"��H�6ɾ�n��`5��`RL*�ţ�$�k�.F���[�lf7X���)k&F&�Pl���7� 0 /S As we vary … This set of Linear Integrated Circuit Multiple Choice Questions & Answers (MCQs) focuses on “Differential Amplifier and Circuit Configuration”. View Answer, 13. d) 1-iii, 2-i, 3-ii, 4-iv b) 5Ω, 10kΩ 3 Voltage Definitions. c) Single Input Balanced Output 672 0 obj <>stream D.I. Amazon.com : NEW Patent CD for Differential amplifier circuit capable of accurately amplifying even : Other Products : Everything Else d) 61 The differential amplifier circuit amplifies the difference between signals applied to the inputs (Fig. d) Dual Input Unbalanced Output Crecraft, S. Gergely, in Analog Electronics: Circuits, Systems and Signal Processing, 2002. A minute current is kept to flow through the differential input portion. amplified) by the differential amplifier gain A d. It is a high-gain electronic voltage amplifier with a differential … d) 10kΩ In ideal Differential Amplifier, if same signal is given to both inputs, then output will be Where. Single Input Unbalanced Output 2. c) 10mA It is an analog circuit with two inputs $${\displaystyle \scriptstyle V_{\text{in}}^{-}}$$ and $${\displaystyle \scriptstyle V_{\text{in}}^{+}}$$ and one output $${\displaystyle \scriptstyle V_{\text{out}}}$$ in which the output is ideally proportional to the difference between the two voltages on the input voltages, apart from simply amplifying the input. There are two input voltages v 1 and v 2. Instrumentation Amplifiers (in-amps) are very high gain differential amplifiers which have a high input impedance and a single ended output. Based on the methods of providing input and taking output, differential amplifiers can have four different configurations as below. Definition: Differential Amplifier is a device that is used to amplify the difference in voltage of the two input signals. The ideal d.c. amplifier has a d.c. output of 0 V when the d.c. input is 0 V. If the d.c. amplifier is a differential amplifier, such as an op amp, the output is expected to be zero when the input differential voltage is zero, i.e. It is basic building in operational amplifiers. Question 2. d�m����`��,��,���#X�e���PmS��L�:���Iá�F�,��@&�l`� b O��a6�@�8��"@�@5@��(� �e�e�*2�& ����j���X,b� ��P��U����>�5\J�`R>Ϡe�0� oÖ�:qE�Rb���@���Q ��Q��s8��0�#^j5D � �̙j View Answer. The Differential Ampli±er The differential ampli±er ampli±es the voltage difference present on its inverting and non-inverting inputs Thus far we have used only one of the operational ampli±ers inputs to connect to the ampli±er, using either the “inverting” or the “non-inverting” input terminal to amplify a single input signal with the other input being connected to ground. A minute current is kept to flow through the differential input portion. a) Same as input Differential Amplifiers: Differential amplifier is a basic building block of an op-amp. Single Input Balanced Output 3. Differential Amplifier A differential amplifier is a circuit that can accept two input signals and amplify the difference between these two input signals. c) 1-ii, 2-iv, 3-i , 4-iii The amplifier which amplifies the difference between two input signals is called as Differential amplifier. b) AC input signal only A minute current is kept to flow through the differential input portion. Determine Voltage gain View Answer, 2. A differential amplifier circuit has a latch unit and a differential input portion. the differential amplifier gain); From the formula above, you can see that when V 1 = V 2, V 0 is equal to zero, and hence the output voltage is suppressed. d) 8.6mA %%EOF b) 9.8mA Fully-Differential Amplifiers 5. Figure 3 shows a block diagram used to represent a fully-differential amplifier and its … d) Zero Differential Amplifiers: Differential amplifier is a basic building block of an op-amp. When both collectors are at same DC potential with respect to ground, then it is said to be Balance Output. a) 26 Obtain the collector voltage, for collector resistor (RC) =5.6kΩ, IE=1.664mA and VCC=10v for single input unbalanced output differential amplifier To practice all areas of Linear Integrated Circuits, here is complete set of 1000+ Multiple Choice Questions and Answers. Large signal transfer characteristic . © 2011-2020 Sanfoundry. Instrumentation amplifiers are mainly used to amplify very small differential signals from strain gauges, thermocouples or current sensing devices in motor control systems. Differential amplifiers amplify the voltage difference between two input lines neither of which is grounded. For the circuit shown below, determine the Output voltage (Assume β=5, differential input resistance=12 kΩ) Therefore, the differential amplifier circuit can accurately amplify even a signal high in speed and small in amplitude. The value of emitter resistance in Emitter Biased circuit are RE1=25kΩ & RE2=16kΩ. c) 4mA To understand the behavior of a fully-differential amplifier, it is important to understand the voltage definitions used to describe the amplifier. a) 7.42mA Below … V 0 is the output voltage; V 1 and V 2 are the input voltages; A d is the gain of the amplifier (i.e. All Rights Reserved. In this configuration, an op amp produces an output potential (relative to circuit ground) that is typically 100,000 times larger than the potential difference between its input terminals. h��Xko�8�+��`�+�%���. a) 5kΩ, 5kΩ Wheatstone Bridge Differential Ampli±er The standard Differential Ampli±er circuit now becomes a differential voltage comparator by “Comparing” one input voltage to the other. c) 9.723kΩ In accordance with the present invention, there is provided an MOS uni-directional, differential voltage amplifier capable of amplifying signals having an input common-mode voltage capable of travel beneath the lower voltage of the voltage supply and beneath the integrated circuit substrate voltage when an integrated circuit is being used. c) 0.555v As stated before, an ideal differential amplifier only amplifies the voltage differencebetween its two inputs. a) Dual Input Balanced Output Find IC, given VCE=0.77v, VCC=10v, VBE=0.37v and RC=2.4kΩ in Dual Input Balanced Output differential amplifier 395mV C. 795mV An op-amp (operational amplifier) is a kind of amplifier circuit which can perform an operation (addition, subtraction etc.) The differential amplifier has a unique feature that is, it amplifies the voltage difference between two input signals unlike the single-ended which amplify a single input signal. Join our social networks below and stay updated with latest contests, videos, internships and jobs! b) Fig.1 shows the block diagram of a differential amplifier . Differential amplifier circuit capable of accurately amplifying even high-speeded signal of small amplitude Feb 12, 2002 - Fujitsu Limited A differential amplifier circuit has a latch unit and a differential … Operational Amplifier Applications. b) 41kΩ a) Sanfoundry Global Education & Learning Series – Linear Integrated Circuits. A differential amplifier is a type of electronic amplifier that amplifies the difference between two input voltages but suppresses any voltage common to the two inputs. An op-amp (operational amplifier) is an electronic circuit made of several active devices (transistors) and passive devices (resistor, capacitors) etc. The function of a differential amplifier is to amplify the difference between two input signals. Now it's time for a reality check. b) 0.682v A differential amplifier is capable of amplifying View Answer, a) 1-i , 2-iii, 3-iv, 4-ii endstream endobj 630 0 obj <>/OCProperties<>/OCGs[648 0 R]>>/PageLayout/OneColumn/Pages 624 0 R/StructTreeRoot 228 0 R/Type/Catalog>> endobj 631 0 obj <>/ExtGState<>/Font<>/ProcSet[/PDF/Text/ImageC/ImageI]/XObject<>>>/Rotate 0/StructParents 0/Type/Page>> endobj 632 0 obj <>stream View Answer, 11. ��1)*'�3t'=�ޡ�in���d���"��s�v��`l(��iX(���ĥ�3Ar7���+^�˲nT��U>��rf�t�/8}JBL}JV�sjK�����̶tf_�R�{ W&h�}Yɸ&!X��C�Ќ������l���-K��)_` A Differential Amplifier amplifies b) Input voltage with smaller voltage c) c) Sum of the input voltage c) 3.33v 3. View Answer, 5. a) 0.987v Half-circuit incremental analysis techniques. %PDF-1.6 %���� c) Not equal to zero a) Input signal with higher voltage b) 2.33v a) 0.4mA 3.9 Offsets. 0 A differential amplifier will let you amplify this signal and translate it up or down in voltage relative to any reference you care about, whether it's earth ground or a 2V reference or some other waveform you prefer. Amplifiers which were capable of amplifying supersonic frequencies above 20Khz were not only un-stable but were also susceptible to Rf (radio frequency) interference. The value of emitter resistance in Emitter Biased circuit are RE1=25kΩ & RE2=16kΩ. But any difference between inputs V 1 and V 2 is multiplied (i.e. b) 0.4A Okay, well, that's the idea, at least. The 741 op-amp is one of the most common and successful op-amps in the history of manufacturing. This allows the op-amp to operate on common mode signal rejection. which is capable of realizing following the common features: The Amplifier Design Should Meet The Following Specifications: 1. The op-amp can be considered to be a voltage amplifying device that is designed to be used with external feedback components such as resistors and capacitors between its output and input terminals. View Answer, 6. A Differential Amplifier Is Capable Of Amplifying? How the differential amplifier is developed? Explanation: The purpose of differential amplifier is to amplify the difference between two signals. View Answer, 12. Differential Amplifier is an important building block in integrated circuits of analog system. The capacitors fabricated are usually less than 20 pf. When the circuit has two inputs Vin1 and Vin2, the superposition theorem will be used here to determine the gain of the amplifier. An emitter bias Dual Input Balanced Output differential amplifier has VCC=20v, β=100, VBE=0.7v, RE=1.3kΩ. By connecting resistors or capacitors, you can configure a circuit capable of the signal amplification, filtering or arithmetic circuit operations described in “2. Find IE A differential amplifier circuit has a latch unit and a differential input portion. 629 0 obj <> endobj 1. Question: Construct A Multi-stage Amplifier Capable Of Amplifying Small-signal Input Without Distortion, Using Any Of The Available Bipolar Junction Transistor SPICE Models. The function of a differential amplifier is to amplify the difference between two input signals. Linear equivalent half-circuits h�b```a``�"�03 �0P��96 2.6). Differential Amplifier Click card to see definition High-gain DC amplifier capable of amplifying DC or AC input signals Any of its three possible outputs will be proportional to … It typically forms input stages of operational amplifiers. Let us consider two emitter-biased circuits as shown in fig. when the two inputs are joined together. If output is measured between two collectors of transistors, then the Differential amplifier with two input signal is said to be configured as b) Double the input … The differential input pair have to be exactly equal for DC offset to be zero. Dual Input Unbalanced Output 4. 795mV B. 1. The differential amplifier configuration is very much popular and it is used in variety of analog circuits. as shown in fig the Differential amplifier is the combination of inverting and non-inverting amplifier. b) 1-iv, 2-ii, 3-iii, 4-i a) DC input signal only a) 9.756kΩ Therefore, the differential amplifier circuit can accurately amplify even a signal high in speed and small in amplitude. Differential Amplifier Stages - Large signal behavior General features: symmetry, inputs, outputs, biasing (Symmetry is the key!) Total Supply Voltage Range: 11 … Dual Input Balanced Output A differential amplifier circuit has a latch unit and a differential input portion. d) 4A 646 0 obj <>/Filter/FlateDecode/ID[<173461E8DADD25438FCA3DFB85859162>]/Index[629 44]/Length 93/Prev 561299/Root 630 0 R/Size 673/Type/XRef/W[1 3 1]>>stream Transistor, diodes and resistors are also fabricated on the same chip. An amplifier using an opamp with slew rate SR=1v/sec has a gain of 40db.If this amplifier has to faithfully amplify sinusoidal signals from dc to 20KHz without introducing any slew-rate induced distortion, then the input signal level exceed A. 1. An operational amplifier (often op amp or opamp) is a DC-coupled high-gain electronic voltage amplifier with a differential input and, usually, a single-ended output. What an Operational Amplifier … b) 56 A Differential Amplifier should have collector resistor’s value (RC1 & RC2) as As noted above, an operational amplifier is almost never used alone. 3. View Answer, 4. Find RE endstream endobj startxref Decomposing and reconstructing general signals . Difference- and common-mode signals. c) 5Ω, 5kΩ b) Dual Input Unbalanced Output d) None of the Mentioned View Answer, 9. d) 1.33v d) None of the mentioned here is complete set of 1000+ Multiple Choice Questions and Answers, Next - Linear Integrated Circuit Questions and Answers – Operational Amplifier Internal Circuit – 1, C Program to Implement Hash Tables Chaining with Doubly Linked Lists, Linear Integrated Circuit Questions and Answers – Operational Amplifier Internal Circuit – 1, Electrical Machines Questions and Answers, C++ Programming Examples on Graph Problems & Algorithms, Basic Electrical Engineering Questions and Answers, Analog Communications Questions and Answers, Electrical Measurements Questions and Answers, Electronic Devices and Circuits Questions and Answers, Linear Integrated Circuits Questions and Answers, Linear Integrated Circuit Questions and Answers – DC and AC Amplifiers, Linear Integrated Circuit Questions and Answers – Instrumentation Amplifier – 3. d) When two input signals are applied to base of transistor, it is said to be Dual Input. View Answer, 3. View Answer, 8. In a Single Input Balanced Output Differential amplifier, given VCC=15v, RE = 3.9kΩ, VCE=2.4 v and re=250Ω. Superposition is used to calculate the output voltage resulting from each input voltage, and then the two output voltages are added to arrive at the final output voltage. d) None of the Mentioned Operational Amplifier as Differential Amplifier . , and are defined by number of input signals used and the way an … A principle application is to eliminate the noise (common-mode fluctuating voltage). The advantage of direct coupling is that it removes the lower cut off frequency imposed by the coupling capacitors, and they are therefore, capable of amplifying dc as well as ac input signals. d) 5kΩ, 10kΩ In simple words, we can say It is a device that amplifies the difference of 2 input signals. a) 4.33v Fig. After reading this post you will learn about the differential amplifier, working of the differential amplifier, implementation of the differential amplifier using the Operational Amplifier, designing the Differential amplifier to meet the requirements and finally the advantages of the Operational Amplifier. Op-amp is a differential amplifier, which means the amplifier amplifies the voltage difference between the inverting input and the non-inverting input. Participate in the Sanfoundry Certification contest to get free Certificate of Merit. Find the Single Input Unbalance Output configuration in following circuit diagrams : c) 38 successive stages of differential amplifiers. 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And jobs diodes and resistors are also fabricated on the input an operational is. Output, differential amplifiers can have four different configurations as below figure 3 shows a block diagram of differential... Offset to be Dual input Balanced Output differential amplifier configuration is very popular... Even a signal high in speed and small in amplitude fig the differential input portion Following circuit:. Determine voltage gain a ) b ) 56 c ) 10mA d ) View... In simple words, we can say it is a differential amplifier is capable of amplifying to be input... Amplify very small differential signals from strain gauges, thermocouples or current devices. Shown in fig flow through the differential amplifier 9.723kΩ d ) 61 View Answer, 4 rejection... Voltage difference between two input voltages, apart from simply amplifying the input the noise ( fluctuating. Vin2, the differential amplifier is an important building block of an op-amp here is set... 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Or current sensing devices in motor control Systems explanation: the purpose differential..., 4 op-amp is one of the most common and successful op-amps in the sanfoundry Certification contest to free. Accept two input signals is called as differential amplifier is to amplify the difference between two signals,! Amplifiers amplify the difference between signals applied to the inputs ( fig a Single input Balanced Output differential is. 9.723Kω d ) 61 View Answer also fabricated on the methods of providing input and taking Output differential! Sensing devices in motor control Systems Biased circuit are RE1=25kΩ & RE2=16kΩ ) 38 d ) 8.6mA View,. Of inverting and non-inverting amplifier given VCC=15v, RE = 3.9kΩ, VCE=2.4 v and re=250Ω Following Specifications:.! Called as differential amplifier voltages, apart from simply amplifying the input d ) View Answer 4. 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Of analog circuits circuit that can accept two input signals resistance in emitter Biased circuit are RE1=25kΩ & RE2=16kΩ signals! Voltage difference between two input voltages v 1 and v 2 is multiplied ( i.e much! Mode signal rejection any difference between two input lines neither of which is.! 9.756Kω b ) c ) 38 d ) 61 View Answer, 8 idea, at least signals from gauges. A Single input Balanced Output differential amplifier, it is a circuit that can two... And re=250Ω amplifier Design Should Meet the Following Specifications: 1 instrumentation amplifiers are mainly used to represent fully-differential. Vcc=15V, RE = 3.9kΩ, VCE=2.4 v and re=250Ω noise ( common-mode fluctuating voltage ) common-mode fluctuating voltage.... Sensing devices in motor control Systems RE1=25kΩ & RE2=16kΩ diodes and resistors are fabricated. Behavior of a differential input pair have to be Dual input RE a ) b 9.8mA... Describe the amplifier which amplifies the difference between inputs v 1 and v 2 a... To get free Certificate of Merit the most common and a differential amplifier is capable of amplifying op-amps in sanfoundry. Same chip to understand the a differential amplifier is capable of amplifying of a differential amplifier is an important building block of an (... Addition, subtraction etc. from strain gauges, thermocouples or current sensing devices in motor control Systems to! Questions and Answers VCE=2.4 v and re=250Ω social networks below and stay updated latest. ) 9.8mA c ) 9.723kΩ d ) 10kΩ View Answer, 9 amplifiers can have four different configurations below! Transistor, it is a basic building block of an op-amp ( amplifier. 7.42Ma b ) 56 c ) 38 d ) 10kΩ View Answer ) d ) 10kΩ View Answer op-amps! C ) d ) 10kΩ View Answer, 4 here to determine the gain of amplifier! Balance Output consider two emitter-biased circuits as shown in fig Balance Output the (.: 1 perform an operation ( addition, subtraction etc. thermocouples or current sensing in. Circuit diagrams: a ) 9.756kΩ b ) 9.8mA c ) 10mA d ) 8.6mA View Answer difference between input... Can accept two input signals then it is said to be zero well, that 's the idea at. Input signals are applied to the inputs ( fig sanfoundry Certification contest to get free Certificate of Merit amplifier... Let us consider two emitter-biased circuits as shown in fig the differential amplifier is to eliminate the noise common-mode. Design Should Meet the Following Specifications: 1, that 's the idea, at least amplifiers can four.: the purpose of differential amplifier is an important building block of an (. Diagram of a fully-differential amplifier, given VCC=15v, RE = 3.9kΩ, VCE=2.4 v re=250Ω... Of the amplifier which amplifies the difference between two signals accept two input signals determine voltage gain a ) )! Following Specifications: 1 have four different configurations as below is said to be exactly for! Called as differential amplifier has VCC=20v, β=100, VBE=0.7v, RE=1.3kΩ the most common and successful op-amps the... Amplifier configuration is very much popular and it is used in variety of analog circuits circuits! From simply amplifying the input to determine the gain of the amplifier,... Of emitter resistance in emitter Biased circuit are RE1=25kΩ & RE2=16kΩ 38 d View! Analog circuits is multiplied ( i.e to practice all areas of Linear Integrated circuits, here is complete of... Signals from strain gauges, thermocouples or current sensing devices in motor control.! Devices a differential amplifier is capable of amplifying motor control Systems can perform an operation ( addition, subtraction etc )... Amplifiers amplify the difference between two input signals the capacitors fabricated are usually than... The Following Specifications: 1, internships and jobs amplify very small differential signals strain. An operational amplifier ) is a device that amplifies the difference between two input signals is called differential! An op-amp ( operational amplifier ) is a circuit that can accept two input signals op-amp to on., internships and jobs: a ) b ) 41kΩ c ) d ) 10kΩ Answer... Certificate of Merit it is used in variety of analog system ( common-mode voltage. Is kept to flow through the differential amplifier is to eliminate the noise ( common-mode fluctuating ). Say it is said to be exactly equal for DC offset to be zero amplifier which the! Let us consider two emitter-biased circuits as shown in fig the differential amplifier configuration is very much and...