Get premium membership and access questions with answers, video lessons as well as revision papers.

Explain the Circuit Analysis and Output voltage of an OP-Amp Integrator

Explain the Circuit Analysis and Output voltage of an OP-Amp Integrator

Answers

1. Circuit Analysis: Since point A in Fig. 9.80 is at virtual ground, the virtual-ground equivalent circuit of operational integrator will be as shown in Fig. 9.81. Because of virtual ground and infinite impedance of the OP-amp, all of the input current i flows through the capacitor i.e. i = i_c.


2. Output voltage: If a fixed voltage is applied to the input of an integrator, eq. (iv) shows that the output voltage grows over a period of time, providing a ramp voltage. Eq. (iv) also shows that the output voltage ramp (for a fixed input voltage) is opposite in polarity to the input voltage and is multiplied by the factor 1/RC. As an example, consider an input voltage v1 = 1V to the integrator circuit of Fig. 9.11 (i). The scale factor of 1/RC is

---

Wilfykil answered the question on August 16, 2019 at 11:54

Next: Define OP-Amp Integrators and Differentiators
Previous: One interior angle of a certain polygon is 84⁰. If each of the other angles is 147⁰, how many sides does this polygon have?

View More Electronics Questions and Answers | Return to Questions Index

Related Questions

• Define OP-Amp Integrators and Differentiators(Solved)
  

  Define OP-Amp Integrators and Differentiators

  Date posted: August 16, 2019.  Answers (1)

• Give the Applications of Summing Amplifiers(Solved)
  

  Give the Applications of Summing Amplifiers

  Date posted: August 16, 2019.  Answers (1)

• Explain what Summing Amplifiers are and how it works(Solved)
  

  Explain what Summing Amplifiers are and how it works

  Date posted: August 16, 2019.  Answers (1)

• Two voltages of + 0.6V and – 1.4 V are applied to the two input resistors of a summing amplifier.(Solved)
  

  Two voltages of + 0.6V and – 1.4 V are applied to the two input resistors of a summing amplifier. The respective input resistors are 400 kilo-ohms and 100 kilo-ohms and feedback resistor is 200 kilo-ohms. Determine the output voltage.

  Date posted: August 16, 2019.  Answers (1)

• Determine the output voltage for the summing amplifier shown in Fig. 9.6(Solved)
  

  Determine the output voltage for the summing amplifier shown in Fig. 9.6
  
  

  Date posted: August 16, 2019.  Answers (1)

• Determine the output voltage for the summing amplifier shown in Fig. 9.5.(Solved)
  

  Determine the output voltage for the summing amplifier shown in Fig. 9.5.
  
  

  Date posted: August 16, 2019.  Answers (1)

• Determine the output voltage for the summing amplifier in Fig. 9.4.(Solved)
  

  Determine the output voltage for the summing amplifier in Fig. 9.4.
  
  

  Date posted: August 16, 2019.  Answers (1)

• Show an OP-Amp with Negative Feedback(Solved)
  

  Show an OP-Amp with Negative Feedback

  Date posted: August 16, 2019.  Answers (1)

• What is the Frequency Response of an OP-Amp?(Solved)
  

  What is the Frequency Response of an OP-Amp?

  Date posted: August 16, 2019.  Answers (1)

• The amplifier in Fig. 7.44 is being used to amplify an input signal to a peak output voltage of 100 mV. What is the maximum...(Solved)
  

  The amplifier in Fig. 7.44 is being used to amplify an input signal to a peak output voltage of 100 mV. What is the maximum operating frequency of the amplifier?
  
  

  Date posted: August 16, 2019.  Answers (1)

• Determine the maximum operating frequency for the circuit shown in Fig. 7.44. The slew rate is 0.5 V/µs.(Solved)
  

  Determine the maximum operating frequency for the circuit shown in Fig. 7.44. The slew rate is 0.5 V/μs.
  
  

  Date posted: August 16, 2019.  Answers (1)

• What is the definition of Slew Rate?(Solved)
  

  What is the definition of Slew Rate?

  Date posted: August 16, 2019.  Answers (1)

• An OP-amp has a gain-bandwidth product of 1.5 MHz. (Solved)
  

  An OP-amp has a gain-bandwidth product of 1.5 MHz. Find the operating bandwidth for the following closed-loop gains (i) A_CL = 1 (ii) A_CL = 10 (iii) A_CL = 100.

  Date posted: August 16, 2019.  Answers (1)

• An OP-amp has a gain-bandwidth product of 15 MHz. Determine the bandwidth of OP- amp when A_CL = 500. Also find the maximum value of...(Solved)
  

  An OP-amp has a gain-bandwidth product of 15 MHz. Determine the bandwidth of OP- amp when A_CL = 500. Also find the maximum value of A_CL when f₂ = 200 kHz.

  Date posted: August 16, 2019.  Answers (1)

• Explain the Output Voltage from OP-Amp(Solved)
  

  Explain the Output Voltage from OP-Amp

  Date posted: August 16, 2019.  Answers (1)

• Show the schematic symbol of an operational amplifier(Solved)
  

  Show the schematic symbol of an operational amplifier

  Date posted: August 16, 2019.  Answers (1)

• The differential amplifier shown in Fig. 7.14 has a differential voltage gain of 2500 and a CMRR of 30,000.(Solved)
  

  The differential amplifier shown in Fig. 7.14 has a differential voltage gain of 2500 and a CMRR of 30,000. A single-ended input signal of 500 μV r.m.s. is applied. At the same time, 1V, 50 Hz interference signal appears on both inputs as a result of radiated pick-up from the a.c. power system.
  (i) Determine the common-mode gain.
  (ii) Express the CMRR in dB.
  (iii) Determine the r.m.s. output signal.
  (iv) Determine the r.m.s. interference voltage on the output.
  
  

  Date posted: August 15, 2019.  Answers (1)

• A differential amplifier has a voltage gain of 150 and a CMRR of 90 dB.(Solved)
  

  A differential amplifier has a voltage gain of 150 and a CMRR of 90 dB. The input signals are 50 mV and 100 mV with 1 mV of noise on each input. Find (i) the output signal (ii) the noise on the output.

  Date posted: August 15, 2019.  Answers (1)

• A differential amplifier has an output of 1V with a differential input of 10 mV and an output of 5 mV with a common-mode input...(Solved)
  

  A differential amplifier has an output of 1V with a differential input of 10 mV and an output of 5 mV with a common-mode input of 10 mV. Find the CMRR in dB.

  Date posted: August 15, 2019.  Answers (1)

• A certain differential amplifier has a differential voltage gain of 2000 and a common mode gain of 0.2. Determine CMRR and express it in dB.(Solved)
  

  A certain differential amplifier has a differential voltage gain of 2000 and a common mode gain of 0.2. Determine CMRR and express it in dB.

  Date posted: August 15, 2019.  Answers (1)