Low Power Oscillator Comparator Circuit Design
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional oscillators have complex structures and high power consumption, necessitating a simpler circuit design that reduces area and power usage in electronic systems.
Innovation Solution
A comparator with a current mirror module, comparison module, and buffering and outputting module is used, along with a low power consumption oscillator that includes a capacitor and current bias module, where the comparator outputs low or high voltages to control charging and discharging of the capacitor based on threshold voltages, effectively reducing the number of comparators and simplifying the circuit structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional oscillators use two comparators with separate high and low threshold comparisons, then the oscillation function is reliable, but the circuit structure becomes complex and power consumption increases
Solution Approach 1:
The patent combines the functions of two separate comparators into a single comparator by integrating both high threshold comparison and low threshold comparison operations. The comparator includes a first comparison unit for low threshold comparison and a second comparison unit for high threshold comparison, both operating within one comparator structure. This merging reduces the number of discrete comparator components from two to one, simplifying the overall circuit structure while maintaining the reliable oscillation function through coordinated operation of the integrated comparison units.
Solution Approach 2:
The single comparator is designed to perform multiple functions: it compares the capacitor voltage against both the high threshold voltage and the low threshold voltage, and controls both the charging and discharging operations. The comparator's output signal serves multiple purposes by triggering different operations based on which threshold is crossed. This multi-functional design eliminates the need for separate dedicated comparators for each threshold, reducing component count and circuit complexity while preserving complete oscillation functionality.
2Measurement precision
If conventional oscillators use two comparators for threshold comparison, then the oscillation control is precise, but the power consumption increases
Solution Approach 1:
The patent merges two separate comparator circuits into one integrated comparator structure that performs both high threshold and low threshold comparisons. By consolidating the comparison operations into a single device with shared components and power supply, the total power consumption is reduced compared to operating two independent comparators. The integrated design allows for more efficient power distribution and reduces redundant power consumption while maintaining precise threshold detection capabilities through its dual comparison units.
3Area of stationary object
If conventional oscillators use a simple structure with basic comparator functions, then the circuit area is reduced, but the power consumption increases
Solution Approach 1:
The patent achieves area reduction by merging two comparators into one integrated structure, consolidating their functional blocks and shared components into a single compact unit. This integration eliminates the need for separate physical spaces for two independent comparator circuits, thereby reducing the overall chip area occupied by the oscillator. Simultaneously, the reduced component count and interconnections lower the static and dynamic power consumption, resolving the trade-off between area and power consumption that plagues conventional simple oscillator designs.
Data Source
AI summary
A comparator includes a current mirror module, a comparison module and a buffering and outputting module. The current mirror module provides a bias current to the comparison module. The comparison module comprises a positive input end, a first negative input end and a second negative input end, the positive input end connects to an external terminal, the first negative input end and the second negative input end input a low threshold voltage and a high threshold voltage, respectively. The comparison module compares a voltage of the positive input end to the low threshold voltage and the high threshold voltage, and outputs a comparison result to the buffering and outputting module.