Post-Emphasis Output Circuit for Signal Distortion Compensation
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Solution Overview
Problem
In electronic devices, signal transmission often results in waveform distortion due to interference, leading to incorrect data transmission between components like processors and memory modules, especially when internal resistors and channel resistors are not perfectly matched.
Innovation Solution
An electronic circuit comprising a driver, delay circuit, and strength control circuit generates an emphasis signal by adjusting the amplitude of delayed signals to compensate for waveform distortion, ensuring accurate data transmission by adding emphasis components to the original signal in specific time intervals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If signals are transmitted simultaneously or concurrently within an information device, then information processing speed is improved, but interference is generated between signals causing waveform distortion
Solution Approach 1:
The patent applies preliminary anti-action by generating an emphasis signal in advance that has the opposite polarity to the expected distortion. The distortion compensation circuit pre-calculates the distortion amount based on the input signal characteristics and generates a compensation signal with inverted polarity to counteract the anticipated waveform distortion before it occurs, thereby maintaining signal integrity during concurrent transmissions
Solution Approach 2:
The patent converts the harmful waveform distortion into a benefit by measuring the actual distortion characteristics and using them to generate a compensating emphasis signal. The distortion that would normally degrade signal quality is instead used as the basis for creating a correction signal that improves overall transmission accuracy, transforming the harmful interference effect into a useful compensation mechanism
2Speed
If the waveform of a signal is distorted during transmission, then signal transmission speed may be maintained, but information accuracy deteriorates
Solution Approach 1:
The patent implements feedback by measuring the actual waveform distortion that occurs during signal transmission and using this measurement to adjust the emphasis signal generation. The distortion compensation circuit continuously monitors the signal characteristics, calculates the distortion amount, and generates compensating signals based on this feedback, thereby maintaining information accuracy while preserving transmission speed
Solution Approach 2:
The patent applies parameter changes by dynamically adjusting the amplitude and timing parameters of the emphasis signal based on the measured distortion characteristics. The circuit modifies the signal parameters (amplitude, delay time) according to the actual transmission conditions and distortion level, enabling adaptive compensation that maintains both transmission speed and information accuracy under varying operating conditions
Data Source
AI summary
An electronic circuit may include a driver, a delay circuit, a strength control circuit, and an adder circuit. The driver may generate a second signal based on a first signal. The delay circuit may delay the first signal by as much as a reference time, to generate a third signal. The strength control circuit may adjust an amplitude of the third signal to generate a fourth signal. The adder circuit may add the second signal and the fourth signal to generate a fifth signal. In a first time interval determined based on the reference time, an amplitude of the fifth signal may be greater than an amplitude of the second signal. In a second time interval except for the first time interval, the amplitude of the fifth signal may be smaller than the amplitude of the second signal. In the second time interval, the amplitude of the fifth signal may be smaller than an amplitude of the first signal.