UNIVERSAL_SIGNAL_GENERATOR

Published:2009/7/21 20:20:00 Author:Jessie | From:SeekIC

Collection of IC oscillators and dividers generates square waves from HF down to subaudible AF, along with markers up into VHF. Selectable oscillator section feeds fixed string of four divide-by-10 stages. Extra SN7490 divider can be switched in at various points along string to add divide-by-5 and divide-by-2 functions. LED in 1-MHz crystal stage indicates that circuit is oscillating. Second stage can be used with any external crystal up into low VHF range. Third stage accepts and conditions extemal sine or square input for feeding to divider chain. Extemal capacitor for fourth stage tunes square-wave generator from several hertz to several megahertz. Optional fifth stage is VCO for entire HF range up to 25 MHz.-J. Schultz, Updated Universal Frequency Generator, 73 Magazine, Nov. 1976, p 50-52.



Reprinted Url Of This Article:
http://www.seekic.com/circuit_diagram/Signal_Processing/UNIVERSAL_SIGNAL_GENERATOR.html

Print this Page | Comments | Reading(3)