Common-mode controlled inductance-capacitance voltage-controlled oscillator
A technology of voltage-controlled oscillators and inductors, applied in the direction of electrical components, automatic power control, etc., can solve the problems of deteriorating the phase noise characteristics of the phase-locked loop, deteriorating the common-mode suppression characteristics of the circuit, etc., and achieve the effect of good phase noise characteristics
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[0020] The present invention will be further described below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.
[0021] Such as figure 1 shown, where the negative resistance PMOS tube M 1 , M 2 , Negative resistance NMOS tube M 3 , M 4 , tail current PMOS transistor M P , inductor L and adjustable capacitor C form the core part of the oscillator; the inverter U 1 , U 2 , PMOS tube M 5 -M 8 , NMOS tube M 9 -M 12 , compensation capacitor C C And the tail current NMOS transistor MN forms a common mode point control circuit; the inverter U 3 -U 6 to drive the inverter. During circuit operation, V OSCP and V OSCN go through U first 1 and U 2 Shaping and sending to M 5 -M 12 composed of monitoring circuits. Suppose V OSCP and V OSCN The common mode point is high, U 1 and U 2 After shapi...
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