[ARC5] Power Supply Filter Question

[J. Forster]

It's basically an emitter follower.

The pass traqnsistor's collector goes to the supply; the emitter to the load.

One version uses a resistor between coll. and base & a capaciytor to
ground. This filters ripple, but does not regulate. It effective
capacitance is roughly beta x cap value.

Another version uses the same resistor position, and one or more zeners in
place of the cap. This regulates the output voltage.

-John

===============





> Hi John and list,
>
> Sounds very interesting.  Where can I find information on the Beta-C
> filter?
>
> On 12/21/2013 7:37 PM, J. Forster wrote:
>> A Beta-C filter is relative simple and more than adequate. With a couple
>> of protective diodes, it's just about bulletproof. The version with a
>> Zener will easily add sufficient regulation.
>
> thanks,
> ben
>
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