Switched-Capacitor Circuits MCQs

Practice Switched-Capacitor Circuits MCQs with four options, answers and explanations for focused Electronics & Telecommunication Engineering revision.

Question 1

Analog ElectronicsSwitched-Capacitor Circuits

A switched-capacitor circuit transfers charge Q=C(V1-V2) each clock cycle. Its average transferred current at clock frequency f is approximately?

AC(V1-V2)/f
BCf(V1-V2)
Cf/[C(V1-V2)]
DC/f only

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Correct Answer: B. Cf(V1-V2)

Explanation: Average current equals charge per cycle multiplied by cycles per second: Iavg=Qf=Cf(V1-V2).

Reference: Standard analog electronics: switched-capacitor charge transfer

Question 2

Analog ElectronicsSwitched-Capacitor Circuits

A switched capacitor C operated at clock frequency f can emulate an equivalent resistance approximately equal to?

AC/f
Bf/C
C1/(Cf)
DCf

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Correct Answer: C. 1/(Cf)

Explanation: With average current I=CfV, comparison with I=V/R gives Req=1/(Cf).

Reference: Standard analog electronics: equivalent switched-capacitor resistance

Question 3

Analog ElectronicsSwitched-Capacitor Circuits

A 10 pF switched capacitor clocked at 100 kHz emulates an approximate resistance of?

A10 kOhm
B100 kOhm
C1 MOhm
D10 MOhm

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Correct Answer: C. 1 MOhm

Explanation: Req=1/(Cf)=1/(10×10^-12×100×10^3)=1×10^6 ohm=1 MOhm.

Reference: Standard analog electronics: switched-capacitor numerical