Auto-Bias 100W Hi-Fi Amplifier v2.1

413

04:58:46

THD+N - Immeasurable in EC. Best guess is about 0.0002%. In reality, the noise will govern most of the value.
Power Consumption - 180W
Output Power - 105W
Efficiency - 59%

To improve ripple rejection, the two 12kOhm resistors and the 130kOhm should be substituted with constant current sources. 

published 2 years ago

ArnMH

2 years ago

Бб ь

592azy2circuitdude

2 years ago

This is probably the most complicated amplifier on all of EveryCircuit! Would you mind describing a block diagram? I may be able to follow it better...

thebugger

2 years ago

Yeah, sure. Simply said, the amp is divided in 4 blocks - symmetric differential amplfiier on the left to handle the voltage amplification, an auto-bias network, the output stage, and additional circuitry (dc offset correction, VI limiter etc.). I'm working on an improved version now, because this one proved too hard to compensate - needs a lot of dominant pole compensations, and even then - might be unstable. A new version is coming soon

592azy2circuitdude

2 years ago

Thanks. That helps a lot. What does unstable mean in an amplifier context? Does it mean the amplifier will hum?

thebugger

2 years ago

No, more like oscillate...

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