Sawtooth wave generating circuit composed of the μA741

Published:2011/8/28 22:51:00 Author:TaoXi | Keyword: Sawtooth wave, generating circuit | From:SeekIC

The sawtooth wave generating circuit which is composed of the μA741 is as shown in the figure. It is composed of the bootstrap circuit and the comparator. If Us is 10V, the C1 will not be charged. The output of A1 will be clamped to negative value, the VT1 cuts off. Because the output of A2 is zero, so the stable voltage power supply Uz of VD2 will add to RP2 and R1, there is the constant current. The constant current charges C1, because the A2 is the voltage follower, the output voltage of A2 is the same as the voltage of C1. The voltage of RP2 and R1 is decided by the VDZ, so the constant current continues to charge the C1. The output voltage of A2 increases linearly with the time.



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