Audio input selector circuit (4416 CMOS)


Posted on Apr 10, 2012

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.



Audio input selector circuit (4416 CMOS) - image 1
Click here to download the full size of the above Image.

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.




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

Suppress Jitter With Hysteresis Circuit
Mic condenser amplifier circuit
switches Raspberry Pi GPIO
sound level meter circuit
Rainwater Storage Gauge
Telephone transmitter
Motor Bike Headlight Controller Circuit
Pulse Reading Logic Probe
LEDs and Switches
Meteor Scatter obs with VHF Radio & Computer
PCM1794A audio DAC
Moving Sensor / Detector Schematic Diagram using IC NE555 and Phototransistor L14F
Eight multi-function lights synchronized chain of circuit SH803



Top