The integrated circuit used in this' 90s amplifier is not very common today. The supply is 24 V, the gain is 50dB and the input resistance is 100 k. The circuit is from an old circuit manual.
Tone controls for audio applications can also be considered filters that must attenuate certain...
This 80's circuit uses germanium transistors like the AC125, AC151, AC163, 2N506 and others to...
The circuit below is suggested by National Semiconductor in technical documentation on the LM3909....