This squelch circuit is placed at the input of the single receiver audio amplifier stage. Its purpose is to silence background noise. The circuit is from an 80's documentation.
This circuit allows the use of headphones and microphones with diverse characteristics in audio...
Here we show how to add a reset key to the monostable using two NAND gates (CB127E). When the key...
This configuration using a CMOS IC produces a 1 MHz signal. The circuit can be used as clock in...