Charge Pump Driving Circuit Reducing Short Circuit Current
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Solution Overview
Problem
Charge pump circuits experience significant power consumption due to short circuit currents when transistors switch, which is not effectively addressed by existing technologies.
Innovation Solution
A charge pump driving circuit with a control signal generator producing specific control signals and a driving signal generator that minimizes direct current paths between the supply and ground terminals, using a configuration where transistors are conductive at different time intervals to prevent short circuit currents, thereby reducing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If transistors are used to control capacitor connections in charge pump circuits, then voltage multiplication is achieved, but short circuit current flows from supply terminal to ground terminal during switching, increasing power consumption
Solution Approach 1:
The patent applies dynamics by making the transistor conduction timing adjustable and optimized. The control circuit dynamically adjusts the conduction timing of switching transistors to ensure they are non-conductive during periods when short circuit current would flow, while still maintaining proper capacitor charging and voltage multiplication functionality. This dynamic timing control resolves the contradiction by adapting transistor operation to minimize energy loss while preserving power multiplication capability.
Solution Approach 2:
The patent employs periodic action through controlled periodic switching of transistors. The switching transistors are activated in periodic cycles that are synchronized with the charge pump operation, ensuring they conduct only when necessary for capacitor charging and remain non-conductive during periods that would generate short circuit current. This periodic switching pattern enables voltage multiplication while systematically eliminating continuous power loss.
2Productivity
If transistor switching frequency is increased to improve charge pump efficiency, then voltage generation speed increases, but short circuit current occurs more frequently, increasing power consumption
Solution Approach 1:
The patent applies dynamics by making the transistor conduction timing adjustable and optimized. The control circuit dynamically adjusts the conduction timing of switching transistors to ensure they are non-conductive during periods when short circuit current would flow, while still maintaining proper capacitor charging and voltage multiplication functionality. This dynamic timing control resolves the contradiction by adapting transistor operation to minimize energy loss while preserving power multiplication capability.
Solution Approach 2:
The patent employs periodic action through controlled periodic switching of transistors. The switching transistors are activated in periodic cycles that are synchronized with the charge pump operation, ensuring they conduct only when necessary for capacitor charging and remain non-conductive during periods that would generate short circuit current. This periodic switching pattern enables voltage multiplication while systematically eliminating continuous power loss.
Data Source
AI summary
A charge pump driving circuit for generating a driving pulse signal to drive a charge pump circuit is disclosed. The charge pump driving circuit includes a control signal generator and a driving signal generator. The control signal generator generates a first control signal, a second control signal, and a third control signal, in which the third control signal transits in the first place, the first control signal transits next, and the second control signal transits last. The driving signal generator, controlled by the first control signal, the second control signal and the third control signal, generates the driving pulse signal, in which the driving signal generator has a rare short circuit current flowing from a supply terminal providing a supply voltage to a ground terminal providing a ground voltage.