HI i prifard to use tweeter & woofer because this amplifier don't need passive filter with tweeter hi frequency response is very good can you give me some suggestion about this amlifier
I know that this is old thread...
but could you elaborate why/how this amplifier don't need passive filter with tweeter hi frequency? is it because you have two seperate amp for low and hi part? (bi-amping with active x-over or passive network in front of the amp?)
Originally Posted by dw1narso
but could you elaborate why/how this amplifier don't need passive filter with tweeter hi frequency
Maybe he's using a piezo HF ?
This basically a schematic of a simple (typical) Class AB amplifier design that uses current feedback instead of voltage feedback via the .47ohm resistor in series with the output load to ground and the 470ohm resistor going back to the input transistor.
It appears that the motional feedback section had not been implemented yet.
FWIW
jer
It appears that the motional feedback section had not been implemented yet.
FWIW
jer
That's not the Philips MF design, just someone's imitation using a current-sensing resistor vs Philips MF sensor...
Motional Feed Back Amplifier Electronic Circuit
Motional Feed Back Amplifier Electronic Circuit
- Status
- This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.
- Home
- Amplifiers
- Solid State
- Motional feedback amplifier based on Philips 40 wats amplifier 1970s