Reference Voltage Circuit With Periodic Charge Compensation
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Solution Overview
Problem
Conventional reference voltage generating circuits consume excessive power and fail to dynamically maintain the voltage level of the reference voltage in real time, affecting the stability and accuracy of analog to digital converters.
Innovation Solution
A reference voltage generating circuit that includes a charge supply circuit providing a first reference voltage during a first period and a voltage supply circuit providing a second reference voltage during a second period, with the voltage supply circuit not providing the second reference voltage during the first period to reduce power consumption and stabilize the voltage level.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the power supply circuit continuously supplies power to maintain the reference voltage level, then the voltage stability is improved, but the power consumption increases
Solution Approach 1:
The patent implements periodic charge compensation by detecting the voltage level of the reference voltage and selectively activating the charge compensation circuit only when the voltage drops below a threshold. This periodic action replaces continuous power supply, maintaining voltage stability while significantly reducing power consumption during normal operation.
Solution Approach 2:
The reference voltage generating circuit monitors its own voltage level and automatically triggers charge compensation when needed. The circuit uses the operational amplifier to detect voltage drops and activates the charge compensation circuit autonomously, eliminating the need for continuous external power intervention while maintaining stability.
2Measurement precision
If the charge compensation circuit performs compensation after the analog to digital converter operates, then the conversion accuracy is maintained, but the voltage level fluctuation cannot be reduced in real time
Solution Approach 1:
The patent uses an operational amplifier to continuously monitor the reference voltage level before the analog-to-digital converter operates. When the voltage drops below a threshold, the system proactively triggers charge compensation in advance, preventing voltage fluctuations that would affect conversion accuracy rather than correcting them after the fact.
Solution Approach 2:
The operational amplifier provides continuous feedback on the reference voltage level to the charge compensation control circuit. This feedback mechanism enables real-time detection of voltage drops and immediate activation of charge compensation, achieving both high conversion accuracy and real-time response by closing the control loop.
Data Source
AI summary
The present invention provides a reference voltage generating circuit. The reference voltage generating circuit includes a charge supply circuit providing a first reference voltage during a first period; and a voltage supply circuit providing a second reference voltage during a second period. The voltage supply circuit does not provide the second reference voltage during the first period.