Pulse Scrambler (CB20547E)

This circuit assumes that a pulse produced by S1 has a constant duration determined by R1 and C1.

2 to 9 kHz PLL Synthesizer (CB4566E)
We found this circuit at Modern Electronics in January 1991. The magazine no longer exists, but...
Rectangular Signal Generator 4046 (CB25255E)
Using a 4046 PLL this circuit generates rectangular signals in three wavebands that depend on the...
Magnetic field meter (CB7061E)
This sophisticated circuit using a liquid crystal display was found in Radio Electronics from the...