Charge Recycling Clock Booster for Fewer Charge Pump Stages
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Solution Overview
Problem
Conventional charge pumps require multiple stages to achieve a target voltage, leading to increased resistance and inefficiency, as they discharge stored charges to ground instead of recycling them for recharging.
Innovation Solution
The electronic device employs a charge recycling mechanism with a clock booster and a secondary booster, where the secondary booster's charges are routed back to the clock booster for precharging, reducing the number of stages and energy loss by avoiding discharge to ground.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stress or pressure
If conventional charge pumps use multiple stages to achieve target voltage, then the target voltage is achieved, but the resistance increases and efficiency decreases
Solution Approach 1:
The patent recovers charges that would otherwise be discarded to ground during the charge pump operation. The recovered charges are reused to precharge capacitors in subsequent cycles, reducing the energy that would be wasted and allowing for fewer stages to achieve the same voltage multiplication.
Solution Approach 2:
The charge pump system uses its own output charges to service its own input requirements by precharging the input capacitors. This self-service mechanism reduces the external power source demand and allows the system to operate more efficiently with fewer stages.
2Duration of action of moving object
If charges are discharged to ground in conventional charge pumps, then the charging cycle completes, but energy is lost and charging duration increases
Solution Approach 1:
Instead of discarding charges to ground, the patent recovers them and stores them for reuse. This recovery process eliminates energy loss and reduces the time required for subsequent charging cycles since capacitors start from a precharged state.
Solution Approach 2:
The patent maintains continuous useful action by recycling charges that would otherwise be lost. The recovered charges are immediately put to use in precharging capacitors, ensuring that energy is continuously utilized rather than being lost in discrete discharge events.
3Power
If multiple stages are used in charge pumps, then target voltage is achieved, but power source demand increases
Solution Approach 1:
The charge pump system precharges its own input capacitors using recovered charges from previous cycles, reducing the power demand on the external power source. This self-service capability allows the system to maintain voltage multiplication with fewer stages and lower overall power consumption.
Solution Approach 2:
By recovering and reusing charges that would be discarded, the system reduces the total energy that needs to be supplied by the power source. This charge recycling mechanism decreases power source demand while maintaining the same voltage output with fewer stages.
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 reduces the number of stages needed to produce a target voltage, decreases resistance, and enhances charging efficiency by recycling charges, thereby reducing the duration and demand on the power source.
Implementation Method 1
a clock booster configured to boost the input voltage to an intermediate voltage
Implementation Method 2
a secondary booster configured to receive the intermediate voltage and further boost the intermediate voltage to a target output voltage
Implementation Method 3
recycle the charges from the secondary booster back to the clock booster to precharge the clock booster
Data Source
AI summary
An electronic device includes: a clock booster including a doubler capacitor, the clock booster configured to precharge the doubler capacitor to store a boosted intermediate voltage greater than an input voltage; a secondary booster including a booster capacitor, the secondary booster configured to use charges stored on the doubler capacitor to generate a stage output greater than the boosted intermediate voltage; and a connecting switch connected to the clock booster and the secondary booster, the connecting switch configured to electrically connect the doubler capacitor and the booster capacitor during a recycling duration for discharging a recycled charge from the booster capacitor to the doubler capacitor through the connecting switch, wherein the recycling duration is after generating the stage output.