Low-distortion oscillating system based on single-chip crystal-controlled conversion

The invention discloses a low-distortion oscillating system based on single-chip crystal-controlled conversion. The low-distortion oscillating system mainly consists of a signal amplifier circuit, a regenerative feedback circuit connected with the signal amplifier circuit, a frequency-selecting circuit connected with the regenerative feedback circuit and a buffer circuit connected with the frequency-selecting circuit and is characterized in that a signal conversion circuit is arranged at the input end of the signal amplification circuit; the signal conversion circuit consists of a conversion chip K, a transformer T1, a capacitor C2, a triode VT1 and a capacitor C3; the capacitor C1 is serially connected between the secondary dotted terminal and the non-dotted terminal of the transformer T1; the capacitor C2 is connected with the capacitor C1; the collector electrode of the triode VT1 is connected with the pin OSC1 of the conversion chip K, the emitter electrode is connected with the pin OSC2 of the conversion chip K via a resistor R1 and the base electrode is connected with the pin OSC2 of the conversion chip K via a fundamental frequency quartz crystal X; one end of the capacitor is connected with the base electrode of the triode VT1 and the other end is connected with the pin VCC of the conversion chip K. According to the low-distortion oscillating system based on single-chip crystal-controlled conversion, the oscillating system can be widely applied to a wide frequency scope, so that the range of application of the oscillating system is expanded.