Pulse generator circuit composed of 74121

Published:2011/8/26 2:27:00 Author:TaoXi | Keyword: Pulse, generator | From:SeekIC

The pulse generator circuit composed of 74121 is as shown in the figure. In this circuit, the 74121(1)~74121(4) are the monostable multivibrator, the σ of the 74121(1) adds to the B port of the 74121(2), similarly, the σ of the 74121(2) adds to the B port of the 74121(3). The σ of the 74121(4) gets through the G6 and G7 gate circuits to go back to the input B of the 74121(1). When the power is connected or there is the external noise, the 74121(1)~74121(4) will produce the oscillation, the σ is in the high level stable state, and the G3 gate circuit detects the σ output of the monostable multivibrators. The G3 output signal is inversed by G4 to control the G1 and G2 to form the oscillation of the unsteady many harmonic oscillator.



Reprinted Url Of This Article:
http://www.seekic.com/circuit_diagram/Signal_Processing/Pulse_generator_circuit_composed_of_74121.html

Print this Page | Comments | Reading(3)