When TEA1062 is on a call, the receiver is very quiet and no sound comes out of the MIC

rfidunion

When TEA1062 is on a call, the receiver is very quiet and no sound comes out of the MIC [Copy link]

I am using TEA1062 chip to make a call circuit. I have drawn a board. After connecting the phone line, I can pick up the phone and hear the other party's voice, but it is very small. When I speak, the other party can't hear me. When I blow into the MIC, I can hear the sound of blowing in my receiver. Is there anyone who has done this before? Please give me some tips.

chunyang

It is recommended to apply the circuit according to the device manual and the experiment should be carried out on a standard telephone line.

qwqwqw2088

There is a faint sound in the receiver.
Tea1062 is not working properly.
Check the chip peripheral
circuit. Is there a problem with the component connection?

rrr335201

Learning is meaningful.

bqgup

It is recommended to test the microphone pickup circuit separately to see if the amplification factor and waveform are distorted. This is the source of the problem.