Electronics Revision Quiz
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Questions and Answers

Define CMRR (Common-mode rejection ratio)

It is defined as the ratio of differential-mode gain to common-mode gain. $CMRR = \frac{|A_d|}{|A_c|}$

Define VSWR

It is defined as circuit power supply rejection expressed as the ratio of output noise by input noise.

What is a multivibrator and its applications?

A multivibrator is an electronic device used to generate multiple frequencies. It is commonly used in timing circuits, delay circuits, oscillators, etc.

Define inverting and non-inverting Op-amp.

<p>Inverting Op-amp produces output signal out of phase with the input signal, while non-inverting Op-amp produces output in phase with the input.</p> Signup and view all the answers

Define CMRR (Common-mode rejection ratio).

<p>CMRR is defined as the ratio of differential-mode gain to common-mode gain. $CMRR = \frac{|A_d|}{|A_c|}$</p> Signup and view all the answers

Define VSWR.

<p>VSWR is defined as circuit power supply rejection, expressed as the ratio of output noise to input noise.</p> Signup and view all the answers

What is a multivibrator and its applications?

<p>A multivibrator is an electronic device used to generate multiple frequencies, commonly used in timing circuits, delay circuits, oscillators, etc.</p> Signup and view all the answers

Define inverting and non-inverting Op-amp.

<p>An inverting Op-amp produces an output signal that is out of phase with the input signal, while a non-inverting Op-amp produces an output that is in phase with the input.</p> Signup and view all the answers

Study Notes

Common-Mode Rejection Ratio (CMRR)

  • CMRR measures the ability of an amplifier to reject common-mode signals, ensuring that it amplifies only the desired differential signal.
  • Defined mathematically as the ratio of differential-mode gain to common-mode gain: (CMRR = \frac{|A_d|}{|A_c|}).

Voltage Standing Wave Ratio (VSWR)

  • VSWR quantifies the efficiency of power transmission in a circuit.
  • It is defined as the ratio of output noise to input noise, indicating the amount of reflected power in a system.

Multivibrators

  • A multivibrator is an electronic circuit that generates various frequencies, making it essential in electronics design.
  • Common applications include:
    • Timing circuits which are vital for precise time delays.
    • Delay circuits used in various control systems.
    • Oscillators that produce continuous repetitive signals.

Inverting and Non-Inverting Operational Amplifiers (Op-amps)

  • Inverting Op-amp:
    • Produces an output signal that is inverted or out of phase with the input signal.
  • Non-Inverting Op-amp:
    • Generates an output signal that is in phase with the input signal.
  • Ideal characteristics of Op-amps include:
    • Zero input current, ensuring no power drain from the source.
    • Infinite input impedance, leading to minimal loading on previous stages.
    • Infinite gain, allowing for maximum amplification of the signal.

Common-Mode Rejection Ratio (CMRR)

  • CMRR measures the ability of an amplifier to reject common-mode signals, ensuring that it amplifies only the desired differential signal.
  • Defined mathematically as the ratio of differential-mode gain to common-mode gain: (CMRR = \frac{|A_d|}{|A_c|}).

Voltage Standing Wave Ratio (VSWR)

  • VSWR quantifies the efficiency of power transmission in a circuit.
  • It is defined as the ratio of output noise to input noise, indicating the amount of reflected power in a system.

Multivibrators

  • A multivibrator is an electronic circuit that generates various frequencies, making it essential in electronics design.
  • Common applications include:
    • Timing circuits which are vital for precise time delays.
    • Delay circuits used in various control systems.
    • Oscillators that produce continuous repetitive signals.

Inverting and Non-Inverting Operational Amplifiers (Op-amps)

  • Inverting Op-amp:
    • Produces an output signal that is inverted or out of phase with the input signal.
  • Non-Inverting Op-amp:
    • Generates an output signal that is in phase with the input signal.
  • Ideal characteristics of Op-amps include:
    • Zero input current, ensuring no power drain from the source.
    • Infinite input impedance, leading to minimal loading on previous stages.
    • Infinite gain, allowing for maximum amplification of the signal.

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Description

Test your knowledge with this quiz on basic electronics concepts including CMRR, VSWR, and multivibrators. Ideal for students revising key topics in electronics and circuit design. Enhance your understanding and prepare for exams with these focused questions.

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