Frequency_synthesizer_using_internal_time_base

Published:2009/7/20 22:45:00 Author:Jessie | From:SeekIC

Frequency synthesizer using internal time base. The counter shown is an Intersil 8240 programmable timer/counter. The output of the circuit is a positive pulse train with a pulse width equal to T and a period equal to (N+1) T, where N is the programmable count between 1 and 255. The modulus N is the total count corresponding to the counter outputs connected to the output bus. For example if pins 1, 3 and 6 are connected to the output bus the total count is N =1+4+32=37 and the period of the output waveform is equal to (N+1) T or 38T. And T=RC (courtesy Intersil, Inc.).



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