Regulator Output Voltage Stabilization via Dynamic Current Compensation
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Solution Overview
Problem
Existing signal generation devices fail to effectively suppress fluctuations in the output voltage of regulators, particularly in high-speed communication systems, as the existing compensation techniques do not account for changes in load due to varying signal frequencies.
Innovation Solution
A signal generation device that includes an output driver, a regulator, and a current compensation circuit, which measures output voltages for different test patterns and adjusts compensation currents to maintain a predetermined difference value, using a control circuit and low-pass filter to ensure the output voltage remains stable.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing compensation techniques are used, then device complexity is reduced, but output voltage fluctuation suppression is insufficient
Solution Approach 1:
The patent implements a feedback mechanism where the output voltage of the regulator is continuously monitored and compared against a reference voltage. The difference (error signal) is fed back to the compensation circuit, which dynamically adjusts the compensation current to counteract voltage fluctuations. This closed-loop feedback system ensures output voltage stability while maintaining reasonable device complexity through efficient error signal processing.
Solution Approach 2:
The compensation circuit is designed to automatically detect and correct output voltage fluctuations without external intervention. The error signal generation and compensation current adjustment occur autonomously within the circuit, allowing the system to self-regulate and maintain stable output voltage across varying load conditions caused by different signal frequencies.
2Reliability
If compensation current is dynamically adjusted, then output voltage fluctuation is suppressed, but control circuit complexity increases
Solution Approach 1:
The patent dynamically changes the compensation current parameter based on the detected output voltage fluctuations. By adjusting the magnitude and direction of the compensation current in response to error signals, the system adapts to varying load conditions caused by different signal frequencies, effectively suppressing output voltage fluctuations while using a relatively simple control mechanism.
3Measurement precision
If test patterns with different logic transition frequencies are used, then voltage fluctuation measurement accuracy is improved, but measurement time increases
Solution Approach 1:
The patent uses multiple test patterns with different logic transition frequencies to measure voltage fluctuations under various operating conditions. By selecting specific test patterns that represent typical operating scenarios rather than testing all possible conditions, the system achieves sufficient measurement accuracy for practical purposes while minimizing the total measurement time required.
Data Source
AI summary
A signal generation device outputs a signal based on a predetermined pattern with a logic transition to a predetermined external device. The signal generation device comprises an output driver which outputs respective signals based on at least two test patterns different in the frequency of the logic transition respectively to the predetermined external device, a regulator which supplies power to the output driver, a current compensation circuit which generates a compensation current, and a control circuit which adjusts a value of the compensation current. The control circuit adjusts, for each test pattern, the value of the compensation current such that a difference value calculated based on output voltages of the regulator becomes a determination criteria value or less.