Audioguru again
- Joined Oct 21, 2019
- 6,673
My simulations show that bootstrapping makes a much better audio amplifier:
1) AC gain is increased.
2) Distortion is much less.
3) Max undistorted output power is much more.
The inductance of a speaker causes the impedance to be higher at high audio frequencies causing less loading of the amplifier.
The speaker inductance causes a phase shift that might cause an amplifier to oscillate at a high frequency if the circuit has no frequency compensation capacitor (that all opamps have). The high frequency oscillation might cause heating in the output transistors even without an input signal.
1) AC gain is increased.
2) Distortion is much less.
3) Max undistorted output power is much more.
The inductance of a speaker causes the impedance to be higher at high audio frequencies causing less loading of the amplifier.
The speaker inductance causes a phase shift that might cause an amplifier to oscillate at a high frequency if the circuit has no frequency compensation capacitor (that all opamps have). The high frequency oscillation might cause heating in the output transistors even without an input signal.
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