Good evening.
Please advise a circuit for a preamplifier (low noise) of an audio signal from a headset (two set)?
Thank You.
Please advise a circuit for a preamplifier (low noise) of an audio signal from a headset (two set)?
Thank You.
R3 - ?My simulation uses R4 to represent the impedance of an electret mic parallel with the 10k resistor that powers it.
For example, which opamp?Use a low noise audio opamp instead.
You might not need your input opamp. Texas Instruments has a page full of low noise audio opamps.For example, which opamp?
It is the wires in and feeding the amplifier, not the headset that picks up hum. A wire carrying a low level signal needs a shielded audio cable to block hum pickup.There is no hum when connecting this headset to other industrial equipment. It's not about the cable.
by Jake Hertz
by Jake Hertz
by Jake Hertz
by Aaron Carman