Found in an RF Design from the 90's this circuit is intended for crystals of less than 1 MHz. Transistors are types of general use today.
This circuit for ceramic cartridges was found in the March 1993 issue of Electronics Now magazine. Q1...
In the figure we have the way to obtain an adjustable 1 to 10 mAconstant current source. The...
Suggested by General Electric in 1967 documentation this circuit uses an isolation transformer to...