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555 Zero-Symmetric Bi-Directional Pulse Generator Circuit

2015-01-29 00:42  
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555 Zero-Symmetric Bi-Directional Pulse Generator Circuit
As shown, this circuit can meet the requirements of the periodic pulse outputing symmetrically to the ground.Under the power voltage of +/-15V, it can output +/-11V bi-directional pulse. VT1, VT2 and R1~R4 make up the voltage shifting networks, using the floating power supply method to the IC 555. 555 and R5, R6, C2 make up the astable multivibrator, oscillation frequency is f=1.44/(R5+2*R6)C2 and it is about 90Hz.