Other Parts Discussed in Thread: OPA4192
Hi? I am Jimmy.
I am not good at English and I am going to ask you a question through Google Translator.
I am using the PGA2320. The contents are as follows.
I connected a circuit called A to one channel and a circuit called B to one channel to a PGA2320 input.
When 0dBVrms, 2KHz is input and PGA2320 is set to 0dB, both signals output a normal signal.
If input signal is -10dBVrms, 2KHz and PGA2320 is changed to 10dB, -10dBvrms is outputted as if the gain control is not performed
The channel that passed the B circuit is 0dBVrms and a normal signal is output.
When PGA2320 input terminal signal is taken, the signal passing through the A channel and the signal passing through the B channel are the same,
and the A circuit is normally controlled when the signal is turned off and then turned on.
How does the point of the question look like the same signal, one channel is gain control and one channel is not gain control?
Are there any special considerations when using the PGA2320?
The circuit A and the circuit B consist of a non-inverting amplifier -> HPF-> LPF.
The difference is that the op amp has one channel: OPA4192, one channel: AD4084-2 Is used.
