This CMNOS crystal-based circuit generates a 2 Hz signal. It was found in the October 1994 issue of Electronics Now. The output signal is square.
We found this oscillator in a documentation for radio amateurs from the 1970s. The circuit can use...
Many oscilloscopes have high impedance inputs that make it difficult to observe high frequency signals...
This is the receiver for the previous circuit we found in the December 1992 Radio Electronics...