Three-level digital signal modulation circuit and modulation method

Abstract

The invention relates to a three-level digital signal modulation circuit and a modulation method. The circuit comprises a three-path modulation control signal generation circuit, a level conversion circuit and an H-bridge modulation circuit, three paths of input ends of the three-path modulation control signal generation circuit are respectively connected with a data (D) input signal, a clock signal (CP) and an enable (EN) input signal, and three output ends of the three-path modulation control signal generation circuit are connected with the input end of the level conversion circuit; the three output ends of the level conversion circuit are connected with the input end of the H-bridge modulation circuit; and two output ends of the H-bridge modulation circuit are externally connected withan A-line load and a B-line load respectively. Through the hierarchical design of the three-path modulation control signal generation circuit, the level conversion circuit and the H-bridge modulationcircuit, common serial data information (D) is modulated into a three-level digital signal, so that the anti-interference capability in the data transmission process is improved, and the data transmission quality is improved.

Description

technical field [0001] The invention relates to the field of data transmission, in particular to a three-level digital signal modulation circuit and method. Background technique [0002] Traditional signal modulation methods include: Amplitude Modulation (AM), Frequency Modulation (FM) and Phase Modulation (Phase Modulation, PM). These three modulation circuits have two input signals, one is the input modulation signal, and the other is the carrier signal. The modulation circuit generates the required modulation signal under the joint action of the modulation signal and the carrier signal. These three modulation methods are the basic modulation methods commonly used. Weak interference ability and poor data transmission quality. Contents of the invention [0003] The purpose of the present invention is to provide a three-level digital signal modulation circuit, which is conducive to improving the anti-interference ability in the process of data transmission and improving t...

AI Technical Summary

Problems solved by technology

[0002] Traditional signal modulation methods include: Amplitude Modulation (AM), Frequency Modulation (FM) and Phase Modulation (Phase Modulation, PM). These three modulation circuits have two input signals, one is the input modulation signal, and the other is the carrier signal. The modulation circuit generates the required modulation signal under the joint action of the modulation signal and the carrier signal. These three modulation methods are the basic modulation methods commonly used. Weak interference ability and poor data transmission quality

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