Dual Pump Voltage Provision Circuit for Fast Boost and Low Ripple
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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
A voltage provision circuit with a first pump circuit and a second pump circuit, each with different driving capabilities, operates during respective time periods to quickly boost supply voltage to a target level while minimizing voltage ripple, using either different or the same reference voltages.
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 setup time is long and voltage ripple is high
Solution Approach 1:
The voltage provision circuit is segmented into multiple pump circuits (first pump circuit and second pump circuit), each with different driving capabilities. The first pump circuit with higher driving capability quickly boosts voltage during initial phase, while the second pump circuit with lower driving capability maintains voltage during steady state. This segmentation resolves the contradiction by enabling fast setup time through the first pump circuit while keeping overall circuit complexity manageable through modular design.
2Device complexity
If a single pump circuit is used to boost supply voltage, then the circuit complexity is low, but the voltage ripple is high
Solution Approach 1:
The voltage provision circuit is segmented into multiple pump circuits (first pump circuit and second pump circuit), each with different driving capabilities. The first pump circuit with higher driving capability quickly boosts voltage during initial phase, while the second pump circuit with lower driving capability maintains voltage during steady state. This segmentation resolves the contradiction by enabling fast setup time through the first pump circuit while keeping overall circuit complexity manageable through modular design.
Solution Approach 2:
The pump circuits operate in periodic phases: the first pump circuit operates during an initial time period to quickly establish voltage, then the second pump circuit takes over during a subsequent time period to maintain voltage with minimal ripple. This periodic operation pattern allows the system to achieve low voltage ripple during steady state while maintaining reasonable circuit complexity.
3Loss of time
If multiple pump circuits with different driving capabilities are used, then the setup time is reduced and voltage ripple is minimized, but the device complexity increases
Solution Approach 1:
The voltage provision circuit dynamically switches between different pump circuits based on operational phase. During voltage boosting phase, the first pump circuit with higher driving capability is activated to reduce setup time. During steady-state operation, the second pump circuit with lower driving capability is activated to minimize voltage ripple. This dynamic configuration resolves the contradiction by optimizing performance for each phase while managing overall complexity through controlled switching.
Solution Approach 2:
The system changes operational parameters by switching between different pump circuits with different driving capabilities. The first pump circuit provides high driving capability during initial voltage establishment, while the second pump circuit provides lower driving capability during steady state. This parameter change approach enables fast setup time and low voltage ripple while managing circuit complexity through parameter optimization rather than structural complexity.
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.