Energy Tracking Circuit Using Comparator for DC-DC Converter
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Solution Overview
Problem
Conventional energy measurement techniques in electronic systems often interfere with circuit operation and reduce efficiency, making it difficult to accurately measure energy consumption over a wide range of voltage values.
Innovation Solution
A circuit and system that includes a DC-DC converter and a comparator to track energy consumption by monitoring the output drive signal of the DC-DC converter, allowing for accurate measurement of energy transferred to a load without affecting the power supply circuitry, using an energy accumulator to accumulate discrete energy transfers over time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional energy measurement techniques are used, then energy consumption can be measured, but circuit operation is interfered with and efficiency is reduced
Solution Approach 1:
The patent introduces a comparator as an intermediary component that monitors the output driver signal without directly interfering with the power supply circuitry. The comparator detects voltage levels that indicate energy transfer states and generates measurement signals, allowing energy measurement while isolating the measurement process from the main power circuit operation.
Solution Approach 2:
The patent replaces conventional direct electrical measurement methods with a signal-based measurement approach. Instead of directly measuring current or power in the main circuit, the system uses voltage level detection through a comparator to infer energy transfer states, substituting direct electrical measurement with indirect signal monitoring.
2Measurement precision
If conventional energy measurement techniques are used, then energy consumption can be measured, but measurement accuracy over wide voltage range is reduced
Solution Approach 1:
The patent segments the energy measurement process into discrete voltage level detections. The comparator identifies specific voltage thresholds that correspond to different energy transfer states (such as charging, discharging, or idle states of the energy storage device). By measuring energy as a sum of discrete state transitions rather than continuous measurement, the system achieves accurate measurement across a wide voltage range of up to six orders of magnitude.
Solution Approach 2:
The patent changes the measurement parameter from direct continuous power measurement to discrete voltage level detection. The comparator monitors voltage levels and identifies transitions between predefined voltage thresholds, converting the measurement problem into a series of binary state detections that are accurate across varying voltage conditions.
Data Source
AI summary
A circuit, system, and method for tracking energy use in a electronic circuit. A circuit includes a DC-DC converter and a comparator. The DC-DC converter is configured to maintain a desired output voltage by switching energy to an energy storage device based on an output voltage of the energy storage device. The DC-DC converter includes an output driver configured to source current to the energy storage device. The comparator is coupled to the DC-DC converter. The comparator is configured to identify a drive state of the output driver, and to generate a signal indicative of amount of energy transferred from the DC-DC converter to a load circuit. The signal corresponds to the identified drive state.