Voltage-controlled oscillator and control method thereof, P2P interface circuit and electronic equipment

Abstract

The invention provides a voltage-controlled oscillator and a control method thereof, a P2P (peer-to-peer) interface circuit and electronic equipment, relates to the technical field of voltage-controlled oscillation, and is used for reducing power supply voltage noise and ensuring that a clock signal has excellent characteristics while realizing a relatively wide action frequency range. The voltage-controlled oscillator comprises N stages of delay units, and each stage of delay unit comprises a first phase inverter, a second phase inverter, a third phase inverter and a fourth phase inverter; the second phase inverter and the third phase inverter are electrically connected with the frequency control end and can control whether to activate the second phase inverter and the third phase inverter or not under the control of the frequency control end.

Description

technical field [0001] The invention relates to the technical field of voltage-controlled oscillation, in particular to a voltage-controlled oscillator and a control method thereof, a P2P interface circuit, and electronic equipment. Background technique [0002] In the field of Display driver IC (Chinese: Display Driver IC, DDI for short), due to the increase in display resolution and frame rate, the P2P (English: point-to-point) interface technology that can transmit high-speed data is widely used. The P2P interface circuit includes a circuit for recovering clock and data from the transmitted signal, and one of the cores constituting the circuit is a voltage-controlled oscillator capable of generating a signal of a desired frequency in a DDI system. [0003] A ring voltage-controlled oscillator (ring VCO) is generally used in most DDI systems. However, in order to reflect a wide operating frequency range in the existing ringVCO, when generating a low-frequency clock signa...

AI Technical Summary

Problems solved by technology

However, in order to reflect a wide operating frequency range in the existing ringVCO, when generating a low-frequency clock signal, the power supply voltage of the ring oscillator (ringoscillator) must be extremely reduced, but due to the existence of the signal amplitude (swing level), like the ground voltage Mains voltage noise like ground bounce becomes very vulnerable

In addition, as the rising time and falling time (rising / falling time) of the clock signal become larger, the phase mismatch (phase mismatch) of the multi-phase clock signal (multi-phase clock) becomes larger, so that the phase noise (phase noise) The resulting clock signal jitter (jitter) will also become larger

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