This circuit was found in a 90s Popular Electronics. It also serves for the analysis of microcontroller signals. The power comes from the circuit under test.
In this oscillator a phase shift network formed by C1, C2, C3 and R1, R3, R4 determine the fase...
Indicated for vinyl media recovery, this circuit is from the 80's, having been found in an...
An interesting application that finds applications in industry, especially when fluctuations in...