Charge Pump Circuit Control System with Level Detector and Ring Oscillator
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Solution Overview
Problem
Traditional charge pump circuit control systems waste energy due to repeated precharge and charge sharing operations, leading to inefficient voltage boosting and unnecessary energy consumption.
Innovation Solution
A charge pump circuit control system with a level detector, ring oscillator, and charge pump circuit, where the level detector generates a control signal that is used by the ring oscillator to produce clock signals, and a latch is designed to coordinate charging/discharging operations, ensuring charge sharing occurs only once after precharging, thereby eliminating redundant operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the level detector control signal is used to directly control the charge pump circuit operations, then the control logic is simple, but repeated precharge and charge sharing operations occur causing energy waste
Solution Approach 1:
The patent introduces a ring oscillator as an intermediary component between the level detector and the charge pump circuit. The ring oscillator receives the control signal from the level detector and generates multiple clock signals that coordinate the operations of multiple charge pump circuits, preventing direct control that would cause repeated operations and energy waste.
Solution Approach 2:
The ring oscillator generates periodic clock signals (ROA, ROB, etc.) that control the charge pump circuits to operate in a coordinated periodic manner. This ensures that precharge and charge sharing operations occur in a controlled sequence rather than repeatedly, reducing energy consumption while maintaining voltage regulation.
2Reliability
If multiple charge pump circuits operate simultaneously to reduce cost and extend life, then component stress is reduced, but coordination control becomes complex leading to repeated operations
Solution Approach 1:
The patent divides the control function into segments by using the ring oscillator to generate multiple separate clock signals (ROA, ROB, etc.) for different charge pump circuits. This segmentation allows each charge pump circuit to operate independently with its own clock signal, simplifying the coordination control while maintaining reliable operation and distributing stress across multiple circuits.
3Measurement precision
If the charge pump circuit performs frequent voltage boosting operations to maintain output voltage, then voltage regulation is effective, but energy consumption increases
Solution Approach 1:
The patent implements a feedback mechanism where the level detector continuously monitors the output voltage (VPP or VBB) and generates a control signal based on the detected voltage level. This feedback ensures that voltage boosting operations are performed only when necessary to maintain the preset voltage level, achieving effective voltage regulation while minimizing unnecessary energy consumption.
Data Source
AI summary
The invention discloses a charge pump circuit control system comprising a level detector, a ring oscillator, and a charge pump circuit. The level detector detects the variation of the output voltage of the charge pump circuit for generating a control signal. The ring oscillator generates a plurality of clock signals according to the control signal, and the charge pump circuit generates the output voltage according to the plurality of clock signals.