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Subject: Capacitors With a Parallel Load

Date: 02/09/03 at 9:54 PM
Posted by: Franklin DeMatto
E-mail: not@available.com
Message Posted:

I'm confused about the properties of a circuit which has a capacitor charging in parallel with a load. The load can either be a resistor, or a semiconductor with a certain breakdown voltage.

I can't figure out whether C1 will charge from V+, or whether it will leak it out through the LOAD.

Experimentation has given different results:

* With a purely resistive load, C1 didn't seem to charge at all (I assume it just leaked out through the load)
* With a Zener diode, alone, C1 charged (but not to the full Zener breakdown voltage...)
* With a Zener diode and series resistor, C1 charged as well, to a different voltage

I'd really like to know what will happen and WHY.
(also, if someone could direct me to a good url/tutorial or book on this, I'd really appreciate it - I haven't seen anything that covers this directly)

|---- C1 | | ------- GRND
|---- LOAD ----- GRND

PS If someone can give me a good url on simple RC/transistor oscillators and/or amplifiers, I'd also appreciate it.

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