+45V │ ┴ 10000µF │ ├──IRF9540 (P-channel) Source │ │ │ Gate─┬─100Ω─┬──From VAS stage │ │ │ │ Drain──┐ 100kΩ │ │ │ │ │ ┴ GND │ │ ├──Output Node─────Speaker (+) │ │ │ Source of IRF540 (N-channel) │ │ │ Gate─┬─100Ω─┬──From VAS stage │ │ │ │ Drain─┐ 100kΩ │ │ │ -45V │ ┴ GND │ │ ┴ 10000µF │ GND
Oscillation due to long input wires. Solution: Use a 22pF capacitor from pin 2 (inverting input) to ground. practical audio amplifier circuit projectspdf
Learn push-pull output stage, biasing diodes, and thermal stability. practical audio amplifier circuit projectspdf
for low power or discrete transistors for specialized "Class A" performance. Popular DIY Amplifier Project Types Low-Power IC Amplifiers LM386 audio amplifier practical audio amplifier circuit projectspdf