Charge Pump Voltage Stability During Mode Switching
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Solution Overview
Problem
Conventional charge pump circuits face instability and noise issues when changing boosting modes during operation, leading to unstable voltage generation.
Innovation Solution
A charge pump method that involves generating a first boosted voltage by a first boosting mode, changing the capacitor voltage level in preparation for a mode change, and then generating a second boosted voltage by a second boosting mode, using a switch controller and capacitors to manage the voltage levels and prevent excessive output.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the boosting mode is changed during operation of a charge pump circuit, then the voltage generation level can be adjusted to meet different driving voltage requirements, but a great deal of noise is generated momentarily leading to unstable operation
Solution Approach 1:
The patent applies preliminary action by preparing the capacitor voltage level before the boosting mode change occurs. The controller detects when a mode change is needed and proactively adjusts the capacitor voltage to the appropriate level beforehand. This prevents the instability and noise that would occur during abrupt mode transitions, as the capacitor is already at the correct voltage level when the boosting mode changes.
Solution Approach 2:
The patent implements feedback by having the controller continuously detect the current boosting mode and capacitor voltage level, then adjust the switching signals accordingly. The controller monitors the operational state and provides feedback control to maintain stable operation during and after mode changes, ensuring the capacitor voltage remains at the appropriate level for the current boosting mode.
2Adaptability or versatility
If the capacitor voltage level is changed during operation, then the boosting mode can be switched to generate different voltage levels, but noise is generated momentarily during the transition
Solution Approach 1:
The controller proactively changes the capacitor voltage level before the boosting mode switch occurs. By detecting the upcoming mode change and adjusting the capacitor voltage in advance through controlled charging or discharging, the system avoids abrupt voltage transitions that generate noise. The capacitor is prepared at the correct voltage level before the mode change, eliminating momentary noise during the transition.
3Reliability
If the charge pump circuit operates with fixed capacitor voltage levels, then the circuit operation remains stable, but the voltage generation cannot be adjusted to meet different driving voltage requirements
Solution Approach 1:
The patent applies dynamics by making the capacitor voltage level adjustable rather than fixed. The controller dynamically changes the capacitor voltage level according to the detected boosting mode, allowing the circuit to adapt to different voltage generation requirements. This dynamic adjustment is performed in a controlled manner that maintains stability, combining the benefits of fixed-level stability with adjustable versatility.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach allows for stable voltage generation even when the boosting mode changes during operation, preventing noise and ensuring the boosted voltage remains within target levels.
Implementation Method 1
a first capacitor and a second capacitor which are provided inside a charge pump circuit
Data Source
AI summary
A charge pumping method includes: generating a first boosted voltage by boosting an input voltage by a boosting mode of a first multiplier; changing the level of a voltage charged in at least one capacitor provided in the inside of a charge pump circuit, in preparation for a change in the boosting mode; and generating a second boosted voltage by boosting the input voltage by a boosting mode of a second multiplier.