Active-load dominant circuit for common-mode glitch interference cancellation

Abstract

“An active-load dominant circuit for common-mode glitch interference cancellation, biased between a first voltage potential and a second voltage potential with an accompanying common-mode glitch interferer. The active-load dominant circuit includes a pair of pull-up networks and a pair of active-load networks. The common-mode glitch interferer is cancelled out due to a symmetric structure of the pair of pull-up networks. At least one set signal and at least one reset signal are provided to a latch in response to a clock signal or a complemented clock signal. At least one of the set signal and the reset signal can be pulled up to the first voltage potential or pulled down to the second voltage potential. The voltage difference of the set signal and the reset signal is large enough for a latch.”

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The present invention relates to a pulse filter, and more particularly to a pulse filter capable of performing common-mode glitch interference cancellation in a half-bridge or full-bridge high-side driver.[0003]2. Description of the Related Art[0004]To describe the related art of the present invention, the relation between a pulse filter and a half-bridge or full-bridge high-side driver shall be introduced first. Please refer to FIG. 1, which shows the architecture of a typical half-bridge driver 100. As shown in FIG. 1, the typical half-bridge driver 100 at least includes a pulse generator 101, a pulse filter 102, and a latch 103.[0005]The pulse generator 101 is used for generating a clock (CLK) signal and a complemented clock (CLKB) signal. The pulse filter 102 is used for cancelling a common-mode glitch interference accompanying the power lines of VBOOT and HBOUT, and generating a set signal and a reset signal to the...

AI Technical Summary

Benefits of technology

"The present invention provides an effective and robust means of glitch interference cancellation for a half-bridge or full-bridge high-side driver. It also introduces a novel active-load dominant circuit capable of generating a large voltage swing for driving a latch without dc power consumption. The invention further provides a solution for common-mode glitch interference cancellation by canceling out the interferer using a pair of pull-up and active-load networks. The large voltage swing is achieved without the need for a dc conducting path, which reduces power consumption and die area. Overall, the invention offers improved performance and efficiency for high-side driver circuits."

Problems solved by technology

As a result, the certain period the capacitor takes to reach a stable state causes a glitch period.

This may also cause the latch 103 malfunction.

As a result, the issues of voltage dropt, power consumption, and die area of a pulse filter are then tangled in the design process.

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