AIC3204 AGC PARAMETERS SETTINGS

Paolo Martinetti

Hi,

i have some doubts about configuring AGC parameters:

1) How may I find the Target Level, and how to use the IIR filter in order to do this. ( The DS is not very clear for me)

2) Suppose I want a signal output of 2 Vpp, and I don't want to apply AGC gain if the signal level is below 0.8 Vpp. How can I do?

Thanks a lot in advance

Paolo

over 5 years ago

0 Diego Melendez over 5 years ago

TI__Guru 57800 points

Hi, Paolo,

The IIR filter is a separate block from the AGC, which can be used in addition to the biquads for audio processing. Target level of the AGC is defined as the nominal output level that the AGC attempts to hold the ADC output signal. We have an app note where you can find more information about the AGC.

Assuming the values of your second question are adjusted for a real scenario, the application you want to achieve can be replicated by enabling the noise threshold feature of the AGC, which sets the level the AGC will consider as noise and hence, any value below that threshold will not be amplified to the target level.

Best Regards,

-Diego Meléndez López
Audio Applications Engineer

0 Paolo Martinetti over 5 years ago in reply to Diego Melendez

Expert 2730 points

Thanks a lot Diego!

Another question: where can I find 'Control Software'?

May I run it without demo board of the codec?

Thanks in advance

Best Regards,

Paolo

0 Diego Melendez over 5 years ago in reply to Paolo Martinetti

TI__Guru 57800 points

Hi, Paolo,

The control software or GUI for the AIC3204 can be found on the product folder in TI.com site. You should be able to use the GUI without the EVM, but please consider that the board should be connected to make a log of the registers configured with the tools.

Best Regards,

-Diego Meléndez López
Audio Applications Engineer

0 Paolo Martinetti over 5 years ago in reply to Diego Melendez

Expert 2730 points

Thanks a lot Diego!

Best Regards

Paolo

Audio

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AIC3204 AGC PARAMETERS SETTINGS