Injection locking type dual-mode prescaler with low power consumption and wide locking range

Abstract

The invention provides an injection locking type dual-mode prescaler with low power consumption and a wide locking range. The injection locking type dual-mode prescaler comprises N+1 stages of annular oscillators, a first mode control switch and a second mode control switch, wherein N is an even number greater than 0; the first mode control switch and the second mode control switch are electrically connected with the (N+1)th stage of oscillator in the N+1 stages of annular oscillators and are suitable for controlling a frequency dividing ratio of the injection locking type dual-mode prescaler with low power consumption and the wide locking range. The injection locking type dual-mode prescaler with low power consumption and the wide locking range has the characteristics of low power consumption and high input frequency; the connected tuning capacitance is controlled by the switches, so that the input frequency range of the injection locking type dual-mode prescaler with low power consumption and the wide locking range can be enlarged.

Description

technical field [0001] The invention belongs to the technical field of wireless communication integrated circuits, in particular to an injection-locked dual-mode prescaler with low power consumption and wide locking range. Background technique [0002] In the field of wireless communication, Phase Lock Loop (PLL) is widely used in filtering, frequency synthesis, modulation and demodulation, and signal detection, and has become an indispensable basic component in the field of communication. [0003] Most PLLs use a prescaler in the feedback path to achieve frequency division. However, as the operating frequency increases, the power consumption of the prescaler also increases continuously, becoming the most energy-consuming component in the entire PLL except for the voltage-controlled oscillator (Voltage Controlled Oscillator, VCO). Therefore, reducing the power consumption of the prescaler is an effective way to realize the low power consumption design of the PLL. [0004] ...

AI Technical Summary

Problems solved by technology

[0006] Aiming at the above-mentioned deficiencies in the prior art, the present invention proposes an injection-locked dual-mode prescaler with low power consumption and wide locking range, which is used to solve the problems of high power and frequency in the prescaler in the prior art. Problems with low and limited input frequency range

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