II-type sub-sampling phase-locked loop circuit with wide loop bandwidth

• Main Authors: CHEN TIANLE, ZHANG XINMING, REN HONGYU, MENG XIANGHE, YANG ZUNSONG, ZHANG WEIDONG, LI BO, FENG CHAOPING, YAN WEIWEI
• Format: Patent
• Language: Chinese; English
• Published: 14.05.2024
• Subjects: AUTOMATIC CONTROL, STARTING, SYNCHRONISATION, OR STABILISATIONOF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES; BASIC ELECTRONIC CIRCUITRY; ELECTRICITY

The invention discloses an II-type sub-sampling phase-locked loop circuit with a wide loop bandwidth, and relates to the technical field of integrated circuits. The circuit comprises a sub-sampling phase discriminator, a transconductance amplifier, a low-pass filter, a preset-stage ring oscillator and a slope generator which are connected in sequence, the sub-sampling phase discriminator determines an input voltage based on a high-frequency signal fed back by the circuit and transmits the input voltage to the transconductance amplifier; the transconductance amplifier is used for converting the voltage difference between the input voltage and the reference voltage into a current signal based on the amplification gain of the transconductance amplifier and outputting the current signal to the low-pass filter; the low-pass filter is used for generating ring oscillator control voltage based on the current signal and filtering high-frequency interference on the ring oscillator control voltage; the ring oscillator i