The circuit presented is based on the National Semiconductor's LM3524, a component not common today. The circuit is from the 1994 Linear Applications Handbook.
Other operational amplifiers can be used in this conventional filter that rejects only one...
The integrated circuit used in this' 90s amplifier is not very common today. The supply is 24 V,...
This squelch circuit is placed at the input of the single receiver audio amplifier stage. Its...