30_MHz_WITH_10_Hz_RESOLUTION

Published:2009/7/6 1:40:00 Author:May | From:SeekIC

Simpl ified counter design using low chip count provides multiplexing of seven digits in Fairchild display, for applications where 1-Hz resolution is not needed. 7207 oscillator/timer gives counting interval of 0.1 s, for updating display 5 times per second. Article also gives circuit of 10:1 prescaler that increases frequency limit to 300 MHz, though with 100-Hz resolution. Total counter current drain is 300 mA from regulated 5-V supply.-H. E. Harris, Simplifying the Digital Frequency Counter, Ham Radio, Feb. 1978, p 22-25.



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