Re: overcharging a ceramic cap

John Larkin <jjlarkin@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx> writes:

> Bummer. I connected a 1 uF, 16 volt 0603 ceramic cap to a power
> supply, through an ammeter. Stepping the voltage up, and after waiting
> for annoying dielectric absorption things, current goes up sort of
> linearly with voltage. I've run out of power supply at 120 volts, 35
> nA. I'll let that cook for a while but, after 40 minutes, the current
> only seems to be going down. So I don't have enough voltage, with this
> supply, to see anything dramatic.

I tried this a while ago. I was running a bit close to the capacitor
voltage rating, and also I was worried about momentary over-voltage
from spikes (e.g. ESD events).

I couldn't get high enough either!

--

John Devereux
.

Relevant Pages

  • Re: Class AB common source mosfet power amplifier
    ... John Larkin writes: ... I am trying to come up with a linear power mosfet ... Frequency range is up to a few kHz, voltage rails will be +/- 80V max. ... I do have a common drain version - that simulates OK - but common ...
    (sci.electronics.design)
  • Re: audio transformers
    ... In message, dated Wed, 30 Aug 2006, John Larkin writes ... But you probably don't need a nickel-iron core; a silicon-iron one will do and that would be much cheaper. ... How low in voltage at 50 Hz can you go, and at what frequency do you need to handle 7 V input? ... John Woodgate, J M Woodgate and Associates, Rayleigh, Essex UK ...
    (sci.electronics.design)
  • Re: Electrostatic Current Monitor
    ... John Larkin wrote: ... extinguishing voltage gives values all over the map. ... a 12KV electrostatic filter. ... The cap will also have a tolerance. ...
    (sci.electronics.design)
  • Re: Current source design (tricky?)
    ... John Larkin wrote: ... >>a reference will meet the OP's stated 5% accuracy ... > Cute circuit, but will probably have some resistor tolerance problems ... referencing a voltage" example which has been there for the past 50 ...
    (sci.electronics.design)
  • Re: 14-3 shared neutral
    ... John Larkin wrote: ... power or the voltage reduced to half. ... the effect voltage will be reduced from, Say, 120 VAC to an effective 84 ... VAC rather than 60 VAC. ...
    (sci.electronics.basics)