Interesting chip...

[Paul Perry]

At 12:14 PM 9/10/98 +0300, Mikko Helin  wrote:
>This is a switched cap filter with only 64 steps, so it's not suitable
>as a DCF.
But, quoting the previous poster,
>>  The frequency is
>>either set by a six-bit control word ( ranges from 44 to 3891 Hz ) when used
>>with a 3.58MHz TV crystal or it can be set from 10Hz to 20KHz by externally
>>clocking it with a TTL or CMOS clock signal.
>>
Does this mean that the resolution, when externally clocked, as fine as the ext 
oscillator? I have seen a wah pedal based on a switched cap filter, where
the wah
 pot  controls an oscillator driving the filter.

paul perry Froswave P/l Melbourne Australia