Pulse doubler

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< Digital Electronic ~ Pulse doubler

eric

Posted: Fri Sep 01, 2006 6:12 pm Post subject: Pulse doubler

Site Admin Joined: 01 Jan 1970 Posts: 311

T. Giesberts
The design of frequency and pulse doubling circuits is normally
complex and critical. The circuit in Figure 1a is a pleasant exception
to this. It is based on a standard monostable multivibrator (MMV)
and produces an output pulse for both the leading and the trailing
edge of the input pulse. The duration of the output pulses is determined
by the time constant R3-C3.
The TTL input signal is linked to both the +T (positive pulse)
and the –T (negative pulse) inputs IC1a via capacitors C1 and C2
respectively. The two inputs cannot be active simultaneously. This
means that at the leading edge of the input pulse, the negative
input must be high, and at the trailing edge, the positive input must
be low.
Since IC1a is a retriggerable MMV,

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