Temperature Effects on Input Bias Current… plus a Random Quiz

RE: Temperature Effects on Input Bias Current… plus a Random Quiz

Johny Kim — Wed, 25 Aug 2021 12:03:03 GMT

To be honest, less is known about the behavior below room temperature because the higher leakage at room temperature towing and above is the greater concern. It’s best not to place high confidence in behavior much below room temperature.

RE: Temperature Effects on Input Bias Current… plus a Random Quiz

Bruce Trump — Sat, 17 Nov 2012 02:29:01 GMT

Thanks for your comments. Richard is correct. This stripe indicates the outside foil of the capacitor. These are non-polar capacitors so the stripe does not indicate polarity. I'll blog sometime in the future on the best way to connect this type of capacitor in various circuits.

RE: Temperature Effects on Input Bias Current… plus a Random Quiz

Richard Dzioba — Fri, 16 Nov 2012 20:52:35 GMT

These types of capacitors are made from a roll of metal on film. One connection would be to the center/start of the roll and the other to the outside/end of the roll. The band indicates the outside connection and the idea is to connect that terminal to ground in audio circuits to minimize AC hum pickup - where one side of the capacitor is grounded that is. I don't know if it made any difference which way around the capacitor was connected if where it was used, one side of the capacitor wasn't connected to ground.

RE: Temperature Effects on Input Bias Current… plus a Random Quiz

Stephen Power — Fri, 16 Nov 2012 16:05:30 GMT

Hi Bruce, I am not going to claim that I knew but I did google your question. According to 'www.justradios.com/captips.html& the black band indicates which end of the cap has some metal foil and that this end should be connected to the lower voltage in order to maximize the life of the capacitor.

RE: Temperature Effects on Input Bias Current… plus a Random Quiz

Patrick Shea — Wed, 14 Nov 2012 20:29:20 GMT

Is it a capacitor multiplier/tolerance rating?