Posted on Jul 12, 2012

The circuit doubles tbe frequency of a digital signal by operating on botb signal edges. Each transition causes exclusive-OR gate IC1 to produce a pulse, which clocks flip-flop IC3 after propagating through buffers IC2C and IC2B. Ifyou remove capacitor Cl, tbe circuit produces narrow output pulses.

Click here to download the full size of the above Circuit.

By including Cl, you can obtain a desired duty cycle for a given input frequency fin.

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