Digital Display Buffer Circuit for Rising-Edge Glitch Removal
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Solution Overview
Problem
Existing digital display control buffers generate glitches at the rising edge of upstream signals, affecting the duty ratio and increasing the risk of signal conversion errors.
Innovation Solution
A digital display control buffer circuit incorporating a glitch removal circuit with a flip-flop unit and filtering unit to control a switch device based on falling edge signals, shortening the delay in turning off the switch and eliminating glitches.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the DDC buffer monitors upstream signal and sends it to downstream using conventional design, then communication between upstream and downstream is achieved, but a large glitch is generated at the rising edge of the upstream signal
Solution Approach 1:
The patent applies preliminary action by detecting the rising edge of the upstream signal in advance and preemptively turning off the first switch device before the glitch can occur. The detection circuit identifies the rising edge transition, and the control circuit responds by disabling the switch device that would otherwise allow the glitch to propagate to the downstream circuit, thus preventing the harmful effect before it happens.
2Reliability
If the switch device is turned off promptly to eliminate glitch, then signal integrity is improved, but the delay in turning off the switch device must be reduced
Solution Approach 1:
The detection circuit performs preliminary detection of the rising edge signal transition, triggering the control circuit to turn off the switch device before the glitch can affect the downstream signal. This preliminary detection and response mechanism minimizes the effective switching delay by initiating the turn-off action as soon as the rising edge is detected, rather than waiting for the glitch to manifest.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The glitch removal circuit effectively reduces the delay in switching off the switch device, preventing glitches and maintaining signal integrity by ensuring timely control of the switch device, thus improving signal quality.
Implementation Method 1
the glitch removal circuit is used to output a control signal to the control end of the first switch device when a first signal outputted by the output end of the second comparison unit is a falling edge
Implementation Method 2
a filtering unit, wherein a first input end of the filtering unit is electrically connected to the first input end of the flip-flop unit, a second input end of the filtering unit is connected to the output end of the flip-flop unit
Data Source
AI summary
The present disclosure provides a digital display control buffer circuit and a digital display control buffer apparatus. The digital display control buffer circuit at least includes a glitch removal circuit, a first comparison unit, a second comparison unit and a first switch device; a first end of the first switch device and a first input end of the second comparison unit are used to input an upstream signal of the digital display control buffer circuit, a first input end of the first comparison unit is used to input a downstream signal of the digital display control buffer circuit; the glitch removal circuit is used to output a control signal to the control end of the first switch device when a first signal outputted by the output end of the second comparison unit is a falling edge, such that the first switch device is turned off.