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From: Tim Wescott on 16 Jun 2010 12:45
On 06/16/2010 08:34 AM, Vladimir Vassilevsky wrote:
>
>
> j wrote:
>
>> A comment re agc:
>>
>> You really need to do a gain line up. Adding gain randomly can cause
>> you a lot of grief in terms of ISI. Too much gain in the wrong place
>> can cause sever distortion which will be signal dependent.
>
> A comment re AGC:
>
> 1) There are only two types of AGC: backward or forward. Backward is
> better suited for analog. The rest is the minor implementation issues.
>
> 2) You don't need an AGC. What you really need a pair of diodes. BAV99
> would do.

Do you mean to clip the signal before it goes into an ADC? That would
depend on the bandwidth of the receiver before the ADC -- clip a
wideband signal and you're just begging for otherwise innocuous signals
to stomp on your desired one.

There are a whole range of receiver design issues that we could comment
on, but they all mean nothing without knowing what the OP is working with.

--
Tim Wescott
Control system and signal processing consulting
www.wescottdesign.com
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