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Electronic Devices & CircuitsFET Amplifiers

A common-gate MOSFET amplifier is often useful at high frequencies partly because it?

  • AAvoids strong Miller multiplication of gate-drain capacitance at the input
  • BHas infinite voltage gain
  • CRequires no bias current anywhere
  • DAlways oscillates
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Correct Answer: A. Avoids strong Miller multiplication of gate-drain capacitance at the input
Explanation: With the gate at AC ground and input applied at the source, the common-gate topology largely avoids the Miller multiplication associated with common-source feedback capacitance.
Reference: Standard analog electronics: common-gate amplifier
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