Whole-course adjustable digital pulse width modulator based on oscillation ring circuit

Abstract

The invention relates to a whole-course adjustable digital pulse width modulator based on an oscillation ring circuit, which comprises an oscillation ring-counting comparator circuit and an output logic circuit, wherein the oscillation ring circuit is formed by connecting K stages of D triggers end to end and used for generating a reset signal required by the D trigger and output by the output logic circuit together with a multi-channel gating device and the counting comparator circuit according to an digital duty cycle control signal externally input, thereby resetting an output signal of the output D trigger to a low level; and the clock end of the output D trigger is used for controlling a high level at the input end to be transferred to the output end, and the reset signal and a clock signal act jointly for finally generating a duty cycle signal at the output end. The whole-course adjustable digital pulse width modulator can not only keep the advantages of a conventional oscillation ring structure digital pulse width modulator, but also enlarge the adjustable range of output duty cycle, thereby being very applicable to being integrated in high-frequency DC(direct current)-DC switching mode power supplies (SMPS) in power supply management systems of miniature handheld devices.

Description

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AI Technical Summary

Benefits of technology

This patented technology uses normal gates for making it easier than traditional methods like phase locked loop (PLC). It achieves high-speed and accurate regulations by providing an efficient method for generating specific duty cycles based on their desired level. Additionally, this system simplifies its construction while maintaining good performance over time due to simplified components used therein.

Problems solved by technology

This patented technical solution described in the patents describes how digital switches are commonly applied on electronic devices due to their flexibility and adaptability towards different loads' demands. While traditional analog methods have limitations in terms of cost efficiency or reduced energy usage, they offer better functionality without sacrificially increasing complexity. By implementing these techniques, digital switch technology becomes more efficient and suitable for use in many applications where there may exist multiple types of electrical sources.

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