HankMcSpank
Newbie level 3
Ok, I've a unique situation.
I want to use a standard Single Ended stereo amplifier, but to eliminate the output caps, I want each of the L/R channel output 'ground connection' to be tied to a common 1/2 VCC voltage.
Now I know that BTL amps essentially do this (eliminate the output cap), but I have a unique need - the output must be push/pull - ie the Left channel must handle the positive part of the waveform and the right channel must handle the negative part of the waveform (whereas a BTL amplifier will always have the inverse on the opposite leg).
The positive/negative will be split before the amplifier, so that the amplifier only receives the half of the waveform it's to act on.
What component could I use to take the bypass pin of an audio amplifier (ie normally 1/2 VCC), so it would hold that voltage with sufficient drive when connected to the stereo channels' output 'ground leg'.
An obvious one is an opamp as a voltage follower - but stereo amplifier output current wil be about 200mA - do opamps exist with sufficient output drive?
I want to use a standard Single Ended stereo amplifier, but to eliminate the output caps, I want each of the L/R channel output 'ground connection' to be tied to a common 1/2 VCC voltage.
Now I know that BTL amps essentially do this (eliminate the output cap), but I have a unique need - the output must be push/pull - ie the Left channel must handle the positive part of the waveform and the right channel must handle the negative part of the waveform (whereas a BTL amplifier will always have the inverse on the opposite leg).
The positive/negative will be split before the amplifier, so that the amplifier only receives the half of the waveform it's to act on.
What component could I use to take the bypass pin of an audio amplifier (ie normally 1/2 VCC), so it would hold that voltage with sufficient drive when connected to the stereo channels' output 'ground leg'.
An obvious one is an opamp as a voltage follower - but stereo amplifier output current wil be about 200mA - do opamps exist with sufficient output drive?