Consider the noninverting op-amp circuit shown in Figure 12.16, with parameters
(ii)
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Microelectronics: Circuit Analysis and Design
- Q. One advantage of having feedback in op amp circuit is A. low gain B. low bandwidth C. can control gain D. high output voltage E. less input signal F. less complicatedarrow_forwarda) Find the close loop transfer function of the following system through block diagram simplification b) Convert the block diagram in a) into a signal flow grapharrow_forward(a) Identify the correct answers 1. Virtual ground of an OP-AMP (a) Is formed only with negative feedback (b) Is always an AC ground, may occasionally be a DC ground (for PMOS) (c) Is coined as a terminology where the input signal splits equally between the terminals (d) Leads to the concept of almost zero difference between the two inputs (both DC and AC) using feedback 2. In an OP-AMP based circuit (a) Phase margin of the closed loop transfer function is a measure of stable operation (b) 45° is a desirable phase margin as it balances the frequency domain stability and the time domain settling optimally (c) Absolute open loop gain numbers are not that important, as long as they are large (d) 45° is only achieved when the RHP zero is placed on one of the poles 3. In a differential amplifier biased with a given tail current I, to increase the overdrive voltage by 2X without changing input capacitive loading, we should (a) Increase W by 2X and reduce L by 2X (b) Reduce W by 2X and…arrow_forward
- 1- Mention any two advantages of Integrated Circuit . 2- For the circuit given below : Vin is a sine wave Vinpp=6 V and Vref=-2.4 V , Assume Vsat=±12V Name the circuit and draw the input and output waveforms . Vin Vref 3- Explain why open-loop op-amp configurations are not used in linear applications? Draw the block diagram of opamp and define the function of each blockarrow_forward+Vcc Vin VI Vo Vref VN -Vcc Ry RxL Figure Q.A2(e). Inverting Schmitt-trigger circuit. (ii) The operational-amplifier (op-amp) of the inverting Schmitt-trigger in Figure Q.A2(e) has saturation voltages of +Vsat = +11 V and -Vsat = -11 V. The voltage divider circuit has the relationship of Rx = 2RY with the value of RY being 100 kn. Using the relationships derived above: (a) Calculate the values of the upper threshold point (UTP or Vi*), lower threshold point (LTP or Vr). (b) Now, sketch the input-output characteristic of the inverting Schmitt- trigger. Clearly label axes, the threshold voltages and the saturation voltages in your sketch.arrow_forwardAn op-amp with open-loop parameters OFAOL = 2 x 105 and fPD = 5 Hz is connected in a noninverting amplifier configuration with a low- frequency closed-loop gain of ACLO = 30. An input voltage signal of v = 100sin(27ft) P V is applied. (a) What is the closed-loop bandwidth?arrow_forward
- Calculate the transfer function for the following ideal op-amp model circuit:arrow_forwardThe open loop gain of an op-amp is 92 dB. Given that the open loop corner frequency is 100 Hz, what is the unity gain bandwidth of the op-amp?arrow_forwarda) An operational amplifier with non-inverting voltage feedback is given in Figure Q4.a. It has the following properties: Vin + 1 kQ Figure Q4.a Open loop gain: 100,000 Open loop output impedance: 400 Open loop bandwidth: 10 Hz Calculate: 1) The closed-loop voltage gain 2) The closed-loop output impedance 3) The closed-loop bandwidth Vout 99 ΚΩ R₁arrow_forward
- 1- Mention any two non linear applications of op- amp. 2- For the circuit given below : Vin is a sine wave Vinpp=9 V and Vref=2.4 V , Assume Vsat=±12V Name the circuit and draw the input and output waveforms . Vo Vin Vref 3- Explain why open-loop op-amp configurations are not used in linear applications? Draw the block diagram of opamp and define the function of each blockarrow_forwardQI. A siniscidal voltage waveform with 5 V pk-pk and period of 10 as is applied to the input of the op-amp shown in the figure. The open loop gain is 200000 and the supply voltage is +12 . Draw the input and output waveforms showing the time relationship. Veearrow_forwardFind the expression for the open loop gain Rm (=Output voltage/Input current). Get the expression for Ro,cl (closed loop output resistance).arrow_forward
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