[sdiy] understanding formula for cutoff?

[Dan Snazelle]

is it 1 over 2pi times RC?

and would i actually solve that by multiplying PI times 2, then figuring out R times C and multiplying the first answer (2pi) times the Answer of RC and then dividing the answer by ONE?

i am trying to finally GET how to do math in electronics and AARON LANTERMANS classes have really given me the encouragement.

thanks'



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> From: tom at electricdruid.net
> Subject: Re: [sdiy] THAT ICs and SSM chips
> Date: Fri, 29 Aug 2008 10:45:59 +0100
> To: taciturn_unquiet at hotmail.com
> CC: synth-diy at dropmix.xs4all.nl
>
> Ian,
>
> I've used both the SSM2164 and SSM2018, and they're easy to get
> running. The 2018 is a really nice VCA, cleaner-than-clean.
> "Transparent" is probably the word you'd use in marketing hype.
> SSM2164 is good too, but cheaper. Mainly I've been using that for
> transconductance cells in a VCF design.
>
> I've also used the THAT 2162 (a dual 2180-style VCA). Seems like a
> good chip, but the SMD package is a pain. Next time I'll either get a
> professional board done for it or use something larger.
>
> In the UK, Farnell sell SSM2018, SSM2164 and THAT 2180. RS also have
> some SSMs. Prices are around £4 per chip (which makes 2164 much
> cheaper per VCA).
>
> Regards,
> Tom
>
>
> On 29 Aug 2008, at 02:02, Ian Smith wrote:
>
>>
>> Hi all,
>>
>> Just a quick question about THAT Corp. ICs, specifically the 2180
>> VCA chip; and the SSM range of chips...
>>
>> ok, a couple questions...
>>
>> How do you guys feel about these modules in a chip? How do they
>> compare to a module made out of discrete components?
>>
>> And the second question... where can you get SSM chips these days?
>>
>> Thanks,
>>
>> -Ian
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