Hi,
I'm building an audio power amplifier using this chip http://www.st.com/web/catalog/sense_power/FM125/CL1503/SC979/PF65141?referrer=70071840 ,
TDA7264 25 W + 25 W stereo amplifier with mute and standby.
Schematic:
I'm building the same circuit shown in the applications section of the datasheet, with the addition of a B250K double potentiometer on the audio input terminals.
The only problem is the potentiometer isn't linear in controlling the signal, it starts at mute, then when I move the slider the sound steps up suddenly, then stays constant, then begin to increase gradually. I wanted to make a buffer circuit around the potentiometer to assist in making it more linear, so any suggestions.
Also if you have other ideas in mind about controlling the volume in a better way or any other ideas about the circuit itself, be my guest.
All suggestions are appreciated.
Thanks.
I'm building an audio power amplifier using this chip http://www.st.com/web/catalog/sense_power/FM125/CL1503/SC979/PF65141?referrer=70071840 ,
TDA7264 25 W + 25 W stereo amplifier with mute and standby.
Schematic:
I'm building the same circuit shown in the applications section of the datasheet, with the addition of a B250K double potentiometer on the audio input terminals.
The only problem is the potentiometer isn't linear in controlling the signal, it starts at mute, then when I move the slider the sound steps up suddenly, then stays constant, then begin to increase gradually. I wanted to make a buffer circuit around the potentiometer to assist in making it more linear, so any suggestions.
Also if you have other ideas in mind about controlling the volume in a better way or any other ideas about the circuit itself, be my guest.
All suggestions are appreciated.
Thanks.
Last edited: