This 16-second voice recording circuit was featured in a telephone answering machine circuit in the March 1992 issue of Radio Electronics magazine.
The scratch is the noise of scratching or scrape that occurs when scratched vinyl records are...
The purpose of this circuit is to eliminate RF picked up by a turntable. The circuit is from a...
The circuit shown uses an operational transconductance amplifier such as the LM3900. Transistors...