Dual Pump Voltage Provision Circuit for Fast Low-Ripple Boosting
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Solution Overview
Problem
Existing voltage provision circuits face a trade-off between voltage ripple and setup time when boosting supply voltage, as they typically rely on a single reference voltage or pump, leading to inefficiencies in achieving desired voltage levels.
Innovation Solution
Implementing a voltage provision circuit with a first pump circuit and a second pump circuit, each with different driving capabilities, to boost the supply voltage to target levels during separate time periods using distinct reference voltages or feedback signals, thereby avoiding high ripple and achieving rapid voltage elevation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single pump circuit is used to boost supply voltage, then the circuit complexity is low, but the voltage ripple increases and setup time is extended
Solution Approach 1:
The voltage boosting function is segmented into two separate pump circuits operating at different time periods. The first pump circuit operates during a first time period to provide initial voltage boosting, and the second pump circuit operates during a second time period to provide additional voltage boosting. This temporal segmentation allows each pump to operate with optimized parameters, reducing overall setup time while maintaining manageable circuit complexity through controlled operation sequences.
2Device complexity
If a single pump circuit is used to boost supply voltage, then the device complexity is low, but the voltage ripple becomes high
Solution Approach 1:
The voltage boosting process is divided into two segmented phases using separate pump circuits. The first pump circuit generates a first output voltage during a first time period, and the second pump circuit generates a second output voltage during a second time period. This segmentation allows each pump to be optimized for its specific operating window, reducing voltage ripple by preventing the overlapping operations that cause interference and ripple accumulation.
Solution Approach 2:
The patent implements periodic action by operating the first and second pump circuits in alternating time periods. The first pump circuit operates during a first time period, then the second pump circuit operates during a second time period. This periodic, non-overlapping operation eliminates the harmful interactions and voltage ripple that would result from simultaneous pump operations, while still achieving the desired voltage boosting effect.
3Measurement precision
If different reference voltages are used for voltage boosting, then the voltage level control precision is improved, but the device complexity increases
Solution Approach 1:
The voltage control system is segmented into two independent control paths, each with its own reference voltage. The first pump circuit uses a first reference voltage for precise control during the first time period, and the second pump circuit uses a second reference voltage for precise control during the second time period. This segmented approach allows high precision control to be achieved in each phase without requiring the entire system to handle multiple reference voltages simultaneously, thus managing complexity through temporal separation.
Data Source
AI summary
A circuit is disclosed. The circuit includes a first pump circuit configured to receive a first reference voltage and provide an output voltage at a first level based on the first reference voltage. The circuit includes a second pump circuit configured to receive a second reference voltage and provide the output voltage at a second level based on the second reference voltage. The first reference voltage is lower than the second reference voltage, and the first level is lower than the second level.