The NE555 timing circuit of ±15v power supply

Published:2011/6/23 3:24:00 Author:qqtang | Keyword: timing circuit, power supply | From:SeekIC

In the figure is the NE555 timing circuit of ±15v power supply. In the circuit, to get a dual-channel capability and work in double power supplies, we can add a floating different working voltage on the power supply terminal of NE555. The resistors R1~R4 and transistors (VT1 and VT2) compose a LEV moving net, which can generate the required floating voltage. The capacitor C1 is used to impede the high frequency oscillation generated by the impedance timer when it is jumping.



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