Boncuk
New Member
Bon, did you have a look at the part I posted? It looks like it might make a good front end for a counter. Appears to work at 100MHz at 10mv input.
Yes Mike,
I did right away. The frequency range is higher I need.
All I want is to clip input signals higher than 5V and amplify the weak inputs (<3V).
That way the counter could be used to measure CMOS circuits with an output of 12V.
I made a prescaler circuit 1:1000 (for decade counting) and variable gate times stepping up in decades from 10µs to 10s. (10s for freaks wanting to measure mains frequency and fractions thereof.)
The only thing I'm worried about is frying the input circuit by applying voltages >VCC.
Kind regards
Hans