Aluminum tooth wave generator circuit diagram
Source: InternetPublisher:明天见 Keywords: Power supply other power circuits Updated: 2021/12/22
Using a transistor T with strong negative feedback can make the capacitor charging current approximately independent of the collector voltage. Adjusting R1 can obtain the required sawtooth wave amplitude, changing R3 can change the collector current and thereby adjust the frequency, and the conversion capacitor value can change the frequency over a wider range.
Parameters in the picture: Ub=20V, R2=18M ohm, R3=1M ohm.
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