Fast phase locking low-noise signal generator and signal generation method

Abstract

The invention provides a fast phase locking low-noise signal generator comprising a low-noise reference signal, a phase discriminator, a narrowband integrator, a broadband integrator, a proportional adder, a voltage controlled oscillator and a feedback network. An output signal of the voltage controlled oscillator passes through the feedback network, and is input to the phase discriminator together with the reference signal for phase discrimination. Of output signals of the phase discriminator, one channel is sent to the narrowband integrator, and the other channel is sent to the broadband integrator. The proportional adder proportionally adds voltages output by the narrowband integrator and broadband integrator to generate voltage controlled voltage of the voltage controlled oscillator. By adopting the two integrators of different bandwidths, two different loop bandwidths are formed, the large loop bandwidth improves the speed of phase locking, the loop is locked to the small bandwidth ultimately, and the characteristic of mutual restriction between small bandwidth and fast locking on a phase-locked loop is achieved.

Description

Technical field [0001] The invention relates to the technical field of testing, in particular to a fast phase-locked low-noise signal generator, and also relates to a fast phase-locked low-noise signal generation method. Background technique [0002] With the development of modern radar and radio communication technologies, various electronic devices continue to put forward higher requirements for the frequency synthesizers used in their internal applications or system tests, not only having extremely low sideband phase noise, but also for phase lock Time requirements are getting higher and higher. [0003] The commonly used frequency synthesis methods mainly include direct frequency synthesis and indirect frequency synthesis. Direct frequency synthesis is a method of adding, subtracting, multiplying and dividing one or several reference frequencies by frequency multiplication, mixing and frequency division to generate the required frequency signal. There are many shortcomings in...

AI Technical Summary

Problems solved by technology

[0011] The invention proposes a fast phase-locked low-noise signal generator and a signal generation method, which solves the problem that the existing frequency synthesis technology cannot take into account the requirements of fast phase-lock and low noise

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