Here are results of several months long work on simple scanner amp.
I studied all available sources about Scanner Amps anlayzed them
and according those information I put together this.
This is nothing new ! I just put existing schematic parts togehter.
All sources were free published so I hope using them I didn't broke any law

Ordinary G120D Scaner Amp can run ILDA test pattern 12K pps
@ +/- 20 deg. Adding feed-forward it can run it faster.
My target is to achieve ILDA Test 18K @ +/- 20 deg. With feed-forward in schematics
I achieved maximum 15K @ +/- 20 deg. Full step response cca 0.4ms (400us).
I played with amount of feed-forward signal and derivation amplifier parameters and best results were: add cca 0.125 Vin
to position signal, derivative time constant 1.8us.
I'm still thinking about posible improvements but at the moment I have no idea. Is there anybody skilled who can help ?
I don't want to have amp like TurboTrack, 18K is enough if my ordinary scan speed will be (or would like to be) 12K at full G120D angle.
There are still two PCBs available if someone is interested.
Let me know your opinions, any feedback is apreciated
pishtak
PS: I saw on this forum many questions and atempts to build something
like this. Hope this can help.
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