VARIABLE_AUDIO_OSCILLATOR，20_Hz_TO_20_kHz

Published:2009/7/5 22:23:00 Author:May | From:SeekIC

To obtain a 1000:1 Sweep Range, the vol-tage across external resistors RA and RB must decrease to nearly zero. This requires that the highest voltage on control pin 8 exceed the voltage at the top of RA and RB by a few hundred millivolts. The circuit achieves this by using a diode to lower the effective supply voltage on the 8038. The large resistor on pin 5 helps reduce duty cycle variations with sweep.



Reprinted Url Of This Article:
http://www.seekic.com/circuit_diagram/Signal_Processing/Oscillator_Circuit/VARIABLE_AUDIO_OSCILLATOR，20_Hz_TO_20_kHz.html

Print this Page | Comments | Reading(3)