This circuit was found in a QST from the 1990s. The circuit expands the scale of a 10V instrument to measure 20V.
This crystal-controlled 1000 kHz oscillator was found in 1980s American documentation. The...
This circuit using a SIDAC as a relaxation oscillator was found in the ON Semiconductor manual for...
The configuration shown is from the National Semiconductor Linear Applications Handbook. The...