1024kHz and 4kHz sine wave output circuit

Published:2011/8/7 1:54:00 Author:nelly | Keyword: sine wave, output | From:SeekIC

This SJT circuit is the 1024kHz warming crystal oscillator. The principle of this circuit is as shown, because the output signal is low, the follow-up transistor VT1 is used to buffer and amplify. The base of VT1 offsets resistor R2, carrier resistor R3. Emitter resistor R4 is the negative feedback resistor, which is used to stabilize the DC working point of VT1. The zener diode VD1, VD2 and capacitor c1 form the regulator and filter circuit. The regulator and filter circuit is used to reduce crystal SJT’s influence caused by supply voltage.



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