For what purpose, FET’s are included in phase sensitive detectors?

Question

Options:

A . As SPDT switches, for working with very high frequency signals

B . As SPDT switches, for working with very low frequency signals

C . As SPST switches, for working with very high frequency signals

D . As SPST switches, for working with very low frequency signals

Answer: Option B
Answer: (b).As SPDT switches, for working with very low frequency signals

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