I need equations for the noninverting tone-control circuit in FIGURE 19, pg.15 from this datasheet:
http://www.intersil.com/data/fn/fn957.pdf
it looks like some passive baxandall/james equations would be somewhere in the ballpark (for corner frequencies at least), however the 18K resistor breaks it ... (I need to get frequencies 45Hz, 4,5KHz, 5dB center-position gain). Additionally, I need to (sort-of) hipass the circuit @25Hz (with dimensioning of the 2uF elco in bass branch).
please gurus, help.
I _need_ those equations. (possibly to use lower-resistances with 5532 for stereo control - or alternatively opa2132/2604)
P.S.: I'm not sure I can get the Kaplan-Wittlinger book mentioned in the datasheet ...
http://www.intersil.com/data/fn/fn957.pdf
it looks like some passive baxandall/james equations would be somewhere in the ballpark (for corner frequencies at least), however the 18K resistor breaks it ... (I need to get frequencies 45Hz, 4,5KHz, 5dB center-position gain). Additionally, I need to (sort-of) hipass the circuit @25Hz (with dimensioning of the 2uF elco in bass branch).
please gurus, help.
I _need_ those equations. (possibly to use lower-resistances with 5532 for stereo control - or alternatively opa2132/2604)
P.S.: I'm not sure I can get the Kaplan-Wittlinger book mentioned in the datasheet ...