Fractional Output Voltage Multiplier Circuit
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Solution Overview
Problem
Existing DC voltage converters, such as charge pump devices, face challenges in efficiently generating higher output voltages while managing power consumption and peak current requirements, particularly in applications like data storage circuits and RFID communication.
Innovation Solution
The proposed solution involves a DC voltage multiplier circuit that operates in multiple modes, utilizing capacitors and a fractional output control circuit to shift and accumulate voltage across terminals, enabling efficient voltage multiplication and fractional output control to optimize voltage levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stress or pressure
If a DC voltage multiplier charges capacitors and stacks voltages to produce higher output voltage, then the output voltage is improved, but the power consumption and peak current requirements increase
Solution Approach 1:
The circuit dynamically switches between charging mode and voltage stacking mode through control signals. The first switch connects the capacitor to the input voltage source for charging, while the second switch connects the capacitor to the output node for voltage stacking. This dynamic switching optimizes power consumption by ensuring capacitors are only charged when necessary and only stacked when the output voltage threshold is reached
Solution Approach 2:
The control circuit monitors the voltage across each capacitor and the output voltage to determine when to switch between charging and stacking operations. When a capacitor reaches the target voltage, the control circuit activates the second switch to stack the voltage. This feedback mechanism prevents excessive charging and reduces peak current requirements by timing the stacking operation optimally
2Stress or pressure
If a DC voltage multiplier uses multiple capacitors and switches to stack voltages, then the output voltage is improved, but the device complexity increases
Solution Approach 1:
The voltage multiplication process is segmented into independent capacitor units, each capable of being charged and stacked independently. The first capacitor can be charged and stacked separately from the second capacitor, allowing modular operation. This segmentation reduces complexity by breaking down the overall voltage multiplication into manageable, independent stages rather than requiring a single complex circuit
Solution Approach 2:
The control circuit performs multiple functions: it monitors capacitor voltages, determines when stacking is needed, activates appropriate switches, and manages the charging and discharging cycles. The same control circuitry manages both capacitors and both switching operations, reducing the need for separate control mechanisms for each function and thereby reducing overall device complexity
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 effective generation of higher output voltages with reduced power consumption and peak current requirements, enhancing the performance of DC voltage converters in various applications.
Implementation Method 1
a first capacitor. In a first mode, the DC voltage multiplier charges the first capacitor from an input voltage source having a first voltage to store a voltage potential between first and second terminals of the first capacitor
Implementation Method 2
the DC voltage multiplier shifts a voltage of the second terminal of the first capacitor up to a second voltage and connects the first terminal to an output node. The shifting of the second terminal to the second voltage causes the first terminal to be shifted to a third voltage, which accounts for an accumulation of voltage from V1 and V2
Implementation Method 3
The connecting of the second capacitor causes the first terminal of the first capacitor to be pulled down to a voltage between the first and third voltages when the second terminal is shifted up to the second voltage
Data Source
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AI summary
Various circuits, apparatuses and methods are disclosed for generating a DC voltage conversion. In an example embodiment, an apparatus includes a DC voltage multiplier having a first capacitor. In a first mode, the first capacitor is charged to store a first voltage between first and second terminals of the capacitor. In a second mode, the DC voltage multiplier shifts a voltage of the second terminal up to a second voltage, thereby shifting the first terminal to a third voltage. The apparatus also includes a fractional output control circuit that when enabled, connects a second capacitor between the first terminal of the first capacitor and the ground reference voltage. The connecting of the second capacitor causes the first terminal of the first capacitor to be pulled down to a voltage between the first and third voltages when the second terminal is shifted up to the second voltage.