[sdiy] Temperature compensating capacitors

[Mattias Rickardsson]

On 6 May 2014 18:45, Ian Fritz <ijfritz at comcast.net> wrote:
> At 05:33 AM 5/6/2014, pata at ieee.org wrote:
>>
>> Hi, I can't imagine to use tempco-ceramics C in analog synthesizer
>> circuit. I can't use ceramic capacitors instead of plastic film capacitors
>> in VCO or in VCF because their DC leak characteristics.
>
> Oh my!  I never use anything else anymore.  C0G and NP0 units have very low
> leakage and tempco.  I have tested these carefully in high-performance VCOs,
> and they work very well.

Same here, C0G/NP0 ceramics in VCOs and VCFs and never had a problem.

Once I put other ceramics in a ladder filter though, and the PCB
turned into a microphone. :-)

/mr