I'm having a lot of trouble with this circuit.
It is the reference circuit from Kodak for their CCD imaging sensors. What I need is when a logic level of 5v is applied to the left just before the 33pf caps I need to get 5 volt out, and when 0v is applied I need to get -3.5 volt from the Reset_CCD line.
So I connected my supply so that R-High was 5V and R-Low was -3.5V. The problem is that no matter what I try I can only get the -3.5V from the output. I thought it was a simple push-pull setup but the voltages applied to the transistors are opposite to what would be expected.
I have a feeling that this circuit might only work at high speeds, hence the very low capacitance of the coupling cap, but I don't have an oscillascope to test it out with.
Its driving what is almost an entirely capacitive load of about 65 pf at about a 30-40Mhz square wave.
Should this circuit give me the 5V and -3.5V output measureable by a simple multimeter when 0-5V TTL logive voltages are applied or do I need an oscillascope and waveform generator to confirm if this is working.
Any help would be greatly apperciated because I need to build a bunch of these to drive a CCD sensor.
Thank you greatly Keith Wakeham