Charge Pump Regulation Circuit Adaptive Frequency Control
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Solution Overview
Problem
Existing charge pump regulation circuits are inefficient due to constant high frequency operation, leading to non-optimal power usage and noise in power supply, and lack a cost-effective and miniaturized solution for adaptive frequency and amplitude regulation.
Innovation Solution
A regulation circuit that analyzes the temporal activity of the charge pump to adjust the clock frequency and amplitude digitally, using a detector and pump clock generator to increase or decrease frequency and amplitude only when necessary, allowing for a space-saving and cost-efficient design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the charge pump operates at high frequency continuously, then the output voltage stability is improved, but the power consumption increases and power efficiency decreases
Solution Approach 1:
The patent implements dynamic frequency adjustment of the charge pump oscillator based on real-time detection of output voltage conditions. The frequency can be increased when voltage stability is needed and decreased when power efficiency is prioritized, allowing the system to adapt to varying operational requirements rather than operating at a fixed high frequency
Solution Approach 2:
The patent changes the operating frequency parameter of the charge pump dynamically. By adjusting the oscillator frequency based on detected voltage conditions, the system can optimize between stability and power consumption by varying this key parameter rather than maintaining a constant high frequency
2Speed
If the charge pump operates at high frequency, then the response speed to load changes is improved, but the power supply noise increases
Solution Approach 1:
The system dynamically adjusts the charge pump frequency based on actual load conditions and voltage stability requirements. When the system is idle or conditions are stable, the frequency is reduced to minimize noise. When rapid response is needed, the frequency increases accordingly, creating an optimal balance between response speed and noise generation
3Measurement precision
If multiple differential amplifiers are implemented for frequency adaptation, then the voltage regulation precision is improved, but the device area and cost increase
Solution Approach 1:
The patent extracts the essential frequency adaptation function from a complex multi-amplifier system and implements it through a simpler detector circuit that monitors voltage conditions and controls the oscillator frequency. This reduces the device area while maintaining the ability to achieve precise voltage regulation through frequency adjustment
Solution Approach 2:
Instead of using multiple physical differential amplifiers, the patent uses a detector that copies or replicates the voltage comparison function in a more compact form, then uses this detected information to control the oscillator frequency, achieving similar regulation precision with reduced hardware
Data Source
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AI summary
The present invention relates to a regulation circuit for a charge pump (12) and to a method of regulating a charge pump. The regulation circuit (10) comprises - a detector (22) operable to analyze a temporal activity of the charge pump, and - a pump clock generator (24) coupled to an output (25) of the detector and having an output (26) coupled to a clock input (13) of the charge pump to vary a pump clock frequency (50) of the charge pump in dependence of the analysis of the detector, or - a supply or voltage generator coupled to an output of the detector and having an output coupled to the charge pump to vary an amplitude of a clock signal within the charge pump in dependence of the analysis of the detector.