the cracken
New Member
i need an automatic gain control for an amp.
i was thinking about using one of those digital pots to alter the gain of an opamp. but how can i drive the digital pot. if i use its (the digpots) threshold then it would constantly cycle up one and down one and it think this would induce alot of distortion to the audio. anyone have any ideas?
i want to keep it as simple as possible so no pic's or anything because ill get confused
heres what i was thinking.
this is only the feed back part of the circuit. The digital pot go's to the gain resistor R1 which isn't shown.
**broken link removed**
does the Vcc to the inverting input need to be the same as the Vcc power supply of the opamp??
Most importantly DO YOU think this will work and any ideas would be gratefully received!!
thanks very much!!
i was thinking about using one of those digital pots to alter the gain of an opamp. but how can i drive the digital pot. if i use its (the digpots) threshold then it would constantly cycle up one and down one and it think this would induce alot of distortion to the audio. anyone have any ideas?
i want to keep it as simple as possible so no pic's or anything because ill get confused
heres what i was thinking.
this is only the feed back part of the circuit. The digital pot go's to the gain resistor R1 which isn't shown.
**broken link removed**
does the Vcc to the inverting input need to be the same as the Vcc power supply of the opamp??
Most importantly DO YOU think this will work and any ideas would be gratefully received!!
thanks very much!!