[sdiy] foolish DC level shift question

Tom Wiltshire tom at electricdruid.net
Fri Jul 17 20:19:24 CEST 2015


It's only foolish if you *don't* ask.

On 17 Jul 2015, at 17:01, Colin Hinz <lists at meccanion.com> wrote:

> I did say it was a foolish question, right? Much thanks!!
> 
> Back to remedial analog school for me, I guess.....
> 
> - Colin
> 
> On Fri, 17 Jul 2015, Richie Burnett wrote:
> 
>> https://en.m.wikipedia.org/wiki/Clamper_(electronics)
>> 
>> -Richie, 
>> ---- Colin Hinz wrote ----
>> 
>>> Hey all,
>>> 
>>> I've got an oscillator which has an AC-coupled output, and I want
>>> to level-shift it such that the minimum is always at 0 volts. I'm
>>> trying to think of a simple way of doing this and I'm coming up
>>> with nothin'. A couple of peculiarities of the signal:
>>> 
>>> a) Amplitude can be up to 100 Vp-p, so obviously, no op-amp
>>>   solutions here, and
>>> 
>>> b) waveshape varies from sawtooth to something like an exponential
>>>   curve.
>>> 
>>> Any ideas?
>>> 
>>> thanks in advance,
>>> 
>>> - Colin
> 
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