Drive-Sense Circuit Feedback for Power Supply Ripple Suppression
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Solution Overview
Problem
Current power supply signal conditioning systems face challenges in effectively managing and monitoring power signals due to variations and deleterious effects such as voltage sag and harmonic glitches, which affect the quality of the power supply and are not adequately addressed by existing technologies.
Innovation Solution
The implementation of a drive-sense circuit (DSC) that simultaneously drives and senses power signals, using a power source circuit and a power signal change detection circuit to detect changes and generate representative signals, allowing for adaptive processing and injection of signals to counteract these effects, thereby conditioning the power supply signal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional power supply systems are used without active conditioning, then the system complexity is low, but the power signal quality deteriorates due to voltage sag and harmonic glitches
Solution Approach 1:
The patent implements a feedback mechanism where the drive-sense circuit continuously monitors the power signal characteristics and dynamically adjusts the injected signal to counteract detected disturbances. The circuit senses voltage sag and harmonic glitches in real-time and generates compensating signals fed back into the power line, thereby maintaining power signal quality through closed-loop control without requiring complex external conditioning systems.
Solution Approach 2:
The drive-sense circuit performs self-service by simultaneously driving and sensing the power signal through the same circuit path. It autonomously detects power quality issues and generates its own compensating signals without requiring separate monitoring or conditioning equipment. The circuit uses its own drive signal as the basis for sensing and generates the corrective action internally, reducing overall system complexity while improving reliability.
2Reliability
If a drive-sense circuit is implemented for power signal conditioning, then power signal quality is improved, but the device complexity increases
Solution Approach 1:
The patent merges the drive and sense functions into a single integrated circuit path. The same circuit that drives the load also serves as the sensing path for detecting power signal disturbances. By combining these functions in one circuit rather than using separate drive and monitor circuits, the patent reduces overall device complexity while maintaining the ability to improve power supply stability through active conditioning.
3Reliability
If active signal injection is used to counteract power disturbances, then power delivery reliability is improved, but the energy consumption increases
Solution Approach 1:
The drive-sense circuit implements partial action by injecting compensating signals only when and where needed to counteract specific power disturbances. Rather than continuously applying full-power conditioning, the circuit monitors power quality and activates signal injection selectively based on detected conditions such as voltage sag or harmonic glitches. This approach improves power delivery reliability only when disturbances occur, minimizing unnecessary energy consumption during normal operation.
Data Source
AI summary
A power supply signal conditioning system includes a power supply, one or more loads, and a drive-sense circuit (DSC). The power supply is operably coupled to one or more loads. When enabled, the power supply configured to output a power supply signal having a DC (direct current) voltage component and a ripple voltage component that is based on conversion of an AC (alternating current) signal in accordance with generating the power supply signal. The DSC is operably coupled to the power supply. When enabled, the DSC is configured simultaneously to sense the power supply signal and, based on sensing of the power supply signal, adaptively to process the power supply signal in accordance with reducing or eliminating the ripple voltage component of the power supply signal to generate a conditioned power supply signal to service the one or more loads.