A low noise voltage controlled circuit

Abstract

The utility model provides a kind of low-noise voltage control control circuit, including power supply VCC 5V, power supply voltage stabilizing module U1, voltage control crystal oscillator U3;The power supply VCC is stabilized after power supply voltage stabilizing module U1, the VDD pin of voltage control crystal oscillator U3;It further includes voltage reference module U2 and voltage divider circuit;The voltage divider circuit includes resistance R1 and resistance R2 in series connection;Resistance R1 and resistance R2 connected public end is the VC pin of the voltage control crystal oscillator U3, the GND pin of voltage control crystal oscillator U3 is grounded.The utility model, new power supply reference module can further inhibit the noise of power supply (VCC) itself, output more pure direct current voltage, reduce noise injection from power supply head, reduce the phase noise caused by power supply noise coupling to output.

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