You may be able to use the National LM13700 which uses a different principle but can be used in voltage controlled gain mode
My blog:
Consort3′s Blog
My blog:
Consort3′s Blog
Simple, comparatively high noise and high THD%.
I've seen folks use a pot and a serial ADC to write a word to a digitally controlled pot, frankly if you're going to go this route you should consider something really great like the Texas Instruments PGA2310.
Maxim had some easily controllable digital pots.
I've seen folks use a pot and a serial ADC to write a word to a digitally controlled pot, frankly if you're going to go this route you should consider something really great like the Texas Instruments PGA2310.
Maxim had some easily controllable digital pots.
There are a number of european and japanese ICs having a similar function: the TDA1074 f.e.:
www.datasheetcatalog.org/datasheet/philips/TDA1074.pdf
www.datasheetcatalog.org/datasheet/philips/TDA1074.pdf
Some version of the SSM20xx series,
http://www.tenmilecreek.net/images/ssm2016/ssm2016.htm
or any of the VCA's from THAT corporation:
http://www.thatcorp.com/THAT_IC_Selection_Guide.shtml#VCAs
jd
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