Transceiver based on phase-locked loop and communication method thereof

Abstract

The invention discloses a transceiver based on a phase-locked loop and a communication method thereof, wherein the transceiver comprises a transmitter and a receiver. The transceiver comprises a modulating circuit and is used for realizing frequency-shift keying modulation on an input signal. The receiver comprises a signal amplifying circuit and a hysteresis comparator. The receiver is used for demodulating an input modulation signal. The transmitter and the receiver share a charge pump phase-locked loop. The transceiver can be used in the field of human body communication. Because multiplexing of partial circuits of the transmitter and the receiver is realized, the transceiver has advantages of greatly reducing power consumption, satisfying a requirement for application of human body communication, furthermore facilitating product size reduction and reducing cost.

Description

technical field [0001] The present application relates to the communication field, and in particular to a transceiver and a communication method based on a phase-locked loop. Background technique [0002] Nowadays, with the improvement of the quality of life, people pay more and more attention to the field of health and health care. Portable and intelligent medical and health devices are emerging, and low power consumption, integration, and wearable have gradually become the development of these medical and health devices. direction. [0003] At present, frequency shift keying (FSK) modulation technology is widely used in short-distance wireless signal transmission. With the rapid development of body area network technology in recent years, the power consumption and reliability of transceivers based on this technology , Anti-interference ability requirements are getting higher and higher. [0004] Many transceiver structures based on human body communication have appeared ...

AI Technical Summary

Problems solved by technology

For example, the Chinese patent CN201491012U proposes a communication chip based on the human body channel, and its transceiver structure adopts a traditional structure; the Korea Institute of Science and Technology (KAIST) has conducted in-depth research on this, and published a paper in the Journal of Solid State Circuits (JSSC) in 2007. In a paper, a low-power transceiver structure for baseband transmission was proposed; and in a 2012 Journal of Solid State Circuits (JSSC) paper, a dual-mode frequency shift keying (Double-FSK) technology was proposed. Anti-jamming transceiver structure; in a paper published in the Journal of Circuits and Systems (TCAS) in 2013, a wake-up receiver structure based on injection locking was proposed, with low power consumption, but no corresponding transmitter structure

[0005] The communication quality of human body communication is related to the type of electrodes, channel length, body parts, gender, and exercise status, but the biggest challenge comes from the requirements for power consumption, so low power consumption has become a problem to be solved by human body communication transceivers

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