Re: high speed full wave rectifier
- From: Fred Bloggs <nospam@xxxxxxxxxx>
- Date: Thu, 20 Sep 2007 20:35:40 -0400
Terry Given wrote:
Jim Thompson wrote:
On Fri, 21 Sep 2007 09:21:49 +1200, Terry Given <my_name@xxxxxxxx>
wrote:
I've been playing with full wave rectifiers. one of the nicest designs is the EDN idea on Jims website. but for 20MHz operation (200kHz sawtooths) the opamp is a bit problematic - its response is all about how the opamp comes out of saturation, even with the extra diode.
any thoughts?
Cheers
Terry
WHAT saturation? Are you tying to run it as single-supply? Don't ;-)
...Jim Thompson
Brain engaged, mouth (OK, fingers) now in neutral - as opposed to the other way round.
1N4148s are not, it seems, infinitely fast :)
doh.
Thanks Jim
Tektronix has a patent on a technique using feedforward compensation specifically for sawtooth rectification at high frequency...
.
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