This detector with ultra-low deviation was found in an American documentation from the 90s. Operational amplifiers are from that time. The power supply must be symmetrical.
This very low current circuit was found in the April 1995 Electronics Now magazine. The frequency...
Rumble is a low frequency rumble that occurs with turntables. If the reader recovers recordings on...
This S-meter circuit was found in a 1976 publication. The circuit is used to measure the signal...