WIDE_FREQUENCY_TTL_CLOCK

Published:2009/7/6 21:06:00 Author:May | From:SeekIC

This free-running TTL square-wave oscillator has a variable frequency output over a 20:1 range or better through use of four of the six inverters in an SN7404 chip and the additional components shown.Frequency of oscillation is determined by the capacitor and the settings of potentiometers R2 and R4; the first pot controls width T1 and the second controls width T2 of the square-wave output. These adjustments are not completely independent.



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