Frequency self-correction phase lock loop adopting bonding wire as electric inductance of oscillator

Abstract

The invention discloses a charge pump phase lock loop which adopts a bonding wire as the electric inductance of an oscillator and has a frequency self-correction function. The phase lock loop adopts the bonding wire as the electric inductance of an electric inductance and capacitance resonant cavity type voltage-controlled oscillator and has the advantages of low power consumption, low noise and small area of chips; a frequency self-correction loop is connected between a control voltage input end of the voltage-controlled oscillator and a capacitance array of the voltage-controlled oscillator, thereby achieving the resonant frequency self-correction function and eliminating the problem of inaccurate resonant frequency caused by the bonding wire; the control voltage input end of the voltage-controlled oscillator is connected with a loop filter, and the loop filter carries out bandwidth dynamic switching by adopting a broadband loop filter and a narrow-band loop filter, thereby improving the speed for resonant frequency self-correction under the condition of not influencing the phase noise and the noise and spur performance of the phase lock loop.

Description

technical field [0001] The invention relates to the technical field of phase-locked loops, in particular to a charge pump phase-locked loop using an inductor-capacitor resonant cavity type voltage-controlled oscillator, specifically a frequency self-correcting charge pump using bonding wires as the inductance of a voltage-controlled oscillator PLL. Background technique [0002] In the currently commonly used charge pump phase-locked loop, the power consumption of the voltage-controlled oscillator accounts for most of the power consumption of the entire phase-locked loop, and the phase noise of the voltage-controlled oscillator directly determines the out-of-band noise of the phase-locked loop, so Reducing the power consumption and noise of the voltage-controlled oscillator is critical to reducing the power consumption and noise of the entire phase-locked loop. Under the CMOS (Complementary Metal Oxide Semiconductor, Complementary Metal Oxide Semiconductor) process, voltage-...

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is how to overcome the defect that the low power consumption and low noise of the voltage-controlled oscillator in the prior art cannot be achieved at the same time

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