This circuit uses a parallel resonant crystal to control the frequency. The circuit is from Radio Electronics magazine, February 1993. Equivalent transistors can be used.
This circuit is from a publication by Newton C. Braga in the United States. The transistor can be...
The circuit is from the Texas Instruments optoelectronics manual. The capacitor depends on the...
This circuit was found in an application note of the LTC1164 from Linear Technology of the 1990s....