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Audio input selector circuit (4416 CMOS)

Rating: 3.00/10 (32Votes
cast)

Category: Audio Circuits / Audio
Mixers
Views: 3938

Rank: 3

CMOS
switches are used directly to select the entries in the audio circuits, it
can introduce unacceptable levels of distortion, but if the switch is
included in the feedback network of an op amp, the distortion due to the
switch may be virtually eliminated. The circuit uses a CMOS switch 4416,
arranged as two independent SPDT switches. If switching transients are
unimportant, R5 and C1 can be omitted, and R4 may be short-circuited.

However, a return path must be maintained even if a channel is
turned off, to keep the inverting input of op amp to ground potential, and
avoid excessive crosstalk between channels.

Datasheet file1: Click
here to download 4416.pdf datasheet.

Datasheet file2: Click
here to download MC3403.pdf datasheet.

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