[time-nuts] ? phase comparison or other device

[Dr Bruce Griffiths]

Chuck Harris wrote:

>> What about the power supply noise that appears at the amplifier output during saturation?
>> Power supply noise is almost always much larger than the opamp input noise.
>> A simple resistor + diode clamp in addition to the feedback clamp will 
>> easily attenuate the output noise of an opamp with diode clamps across 
>> its feedback resistor.
>>     
>
> The output of an opamp is always referenced to its power supply,
> regardless of the configuration.  If the power supply is noisy,
> the output is noisy.
>
> -Chuck Harris
>
>   
Only when that opamp output is saturated.
When in linear operation the power supply rejection, at least at low 
frequency, is significant.

Bruce