Free-running-multivibrator

  
This is the simplest of any programmable oscil lator circuit, since only one stable timing capacitor is required. The output square wave is about 25 V pk-pk, and bas rise and fall times of about 0.5 p,s.
Free-running-multivibrator - schematic

If a programmable attenuator circuit is placed between the output and the divider network, 16 frequencies can be produced with two HA-200 "s and still only one timing capacitor.




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