Re: eliminating CMRR problems -- was, 3 dB bandwidth
- From: Winfield Hill <Winfield_member@xxxxxxxxxxx>
- Date: 12 Jul 2005 10:25:25 -0700
Winfield Hill wrote...
>
> Mike Monett wrote...
>>
>> It followed a 5KHz 1,900V p-p sine wave with a 50k || 50pF load
>> with no problem.
That's pretty good. My amplifier is a low-power design, taking only
800mW total from the +1250V and -1200V power rails (so we can power
100 of them with 80W heating). It's not meant for speed, but rather
for low noise (0.1ppm) and low Zout. In use it'll drive 60 feet of
coax, and I test it with a 3000pF load. With this load it does fine
delivering 2200 volts p-p at 150Hz, but it shows slew-rate distortion
at 200Hz. At 150Hz 2.2kVpp it's delivering +/-3mA to the 3000pF load.
The amplifier is current limited at +/-4mA. -3dB is about 3kHz.
--
Thanks,
- Win
.
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