Clamp Amp

[Freq Band]

I collect IC's from scrapped (surplus) circuit boards from a local shop here in Los Angeles.
...Only if they're socket-ed, and seem in good shape. There's not a lot of audio based scrap. These days, all that pro "analog video" gear is being trashed by the studios to make room for the new high def stuff.
So I find lots of video op-amps that may or may not be ok with audio/synth stuff.
I download datasheets for what I find.

Anyway, I came across this AD8036 clamping op-amp. I think there are some uses for it synth-wise. (Remember, I ain't no "injeneer".)
http://www.analog.com/UploadedFiles/Data_Sheets/148382251AD8036_8037.pdf#search=%22ad8036%22

Look on page 20, there is a schemo for an Amplitude Modulator.
A carrier signal, and a modulation signal are fed in the amp's inputs.
.........and the results vary.....I know because I built that circuit last night.
I used a function generator @ 2v pp, square wave for the carrier.
Sent a modulation signal in the other input....from my Novation A-station.
What I got out depended on several things....the amplitude of the carrier, the frequency of the carrier, and the the offset of "Vh" (pin 8 to a pot wiper(2) , +5v and -5va to pot's 1 & 3).
Sound?.....at times like ring-mod, other times like noise strapped to the modulator. Interesting areas: carrier frequency turned way down gave an on-off effect. My funct generator has a sweep with width and speed, that was interesting.
I did hear a small popping with the clamping action with a square wave carrier, but I tried a sine wave, and that remedied that, but possibly it needs a buffer on the output. (or is the amp itself already a buffer?) The datasheet says "0.5v offset at Vh" and I may not have been able to dial that in precisely with a standard 10ka pot......maybe part of the popping source.

Last night was just a quick impatient test for me. My first synth is not yet done, but I have several other commercial synths to use as modulators (SE1x).


Maybe you guys have tips or ideas.

=FB=