Clock regeneration delay chain with high precision and low kickback noise

Abstract

The invention discloses a clock regeneration delay chain with high precision and low kickback noise. The clock regeneration delay chain comprises a voltage conversion module which is connected with avoltage input end and is used for converting an input signal into a first voltage signal and a second voltage signal, a delay chain module which is connected with the voltage conversion module and a clock input end and is used for controlling clock delay time according to the first voltage signal and the second voltage signal to obtain a first clock signal cluster and a second clock signal cluster, and a clock driving module which is connected with the delay chain module and is used for receiving and processing the first clock signal cluster and the second clock signal cluster and outputting amulti-phase clock signal cluster. The clock regeneration delay chain provided by the invention has interference capability and clock regeneration capability and can adapt to high-precision system-level application.

Description

technical field [0001] The invention belongs to the technical field of laser radar signal receiver systems, and in particular relates to a clock regeneration delay chain with high precision and low kickback noise. Background technique [0002] Lidar uses a laser transmitter to emit laser light on the object to be detected. The laser echo reflected by the target object is received by the avalanche photodiode working in linear mode and converted into a current signal, and then the front-end analog receiver converts the avalanche photoelectric The pulse current generated by the diode is linearly converted into a voltage signal, and then the time-of-flight information of the pulse is obtained by using the time-to-digital conversion circuit, or the amplitude of the echo pulse is collected by the analog-to-digital converter, and finally provided to the subsequent digital signal processor for processing. further processing. In the time-to-digital conversion circuit, the delay chai...

AI Technical Summary

Problems solved by technology

[0004] However, the traditional voltage-controlled delay unit does not have anti-interference ability and clock regeneration ability, the phase interval of the output multi-phase clock is inconsistent, the duty cycle consistency is poor, the phase noise is high, the phase separation accuracy is low, and the voltage discrimination of similar delay times is low. , highly susceptible to environmental noise, unable to adapt to high-precision system-level applications such as multi-line integrated chips and high-resolution precision chips

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