[sdiy] SSM2044 Frequency Range

[rsdio at audiobanshee.com]

On Sep 2, 2015, at 5:21 PM, Tim Ressel <timr at circuitabbey.com> wrote:
> I just built an SSM2044 based directly on the datasheet schematic. I'm using 12 volt rails. The frequency range is less than expected. The most I get is about 130:1, and when I adjust it for 1 volt/octave the range is about 100:1. Even when I run it on 15 volt rails I get about 370:1. This is far short of the 1000:1 the datasheet talks about.
> 
> Any ideas?

Do you see +/-90 mV at pin 13 when you vary the CV?

How are you confirming the filter frequency cutoff?

Do you have the entire circuit on page 54, including the Frequency Offset Adjust and the Control Summer?

Brian