10
votes
2answers
177 views

Why do some of my IE converter circuits have a large offset voltage?

The following circuit is an active current to voltage converter with switchable gain. Schematic Not shown: The inverting input is held low through a 10K resistor when the circuit is powered on but ...
2
votes
7answers
961 views

Switching op-amp gain resistances - how?

Given the following circuit: What is the component / circuit I should be using to switch the signal between each of the gain resistors? (the ⊠s in the schematic) The inputs ID0 to ID2 are TTL ...
7
votes
6answers
982 views

How can I convert the output from a momentary switch to a pulse on push and a pulse on release?

The title pretty much says it all. I have an idea to try out involving a op-amp differentiator circuit and a diode bridge, but I am flying blind. Also I am trying to accomplish this without a ...