Bootstrap Circuit with Adjustable Capacitors for Memory Voltage Boost
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Solution Overview
Problem
Existing bootstrap circuits for stepping up voltage in memory devices have complex configurations and lack the ability to easily adjust the boost voltage, which complicates their implementation and efficiency.
Innovation Solution
A simplified bootstrap circuit design incorporating transistors, capacitors, and resistors with adjustable resistance and capacitance values, allowing for precise control of the boost voltage, and including a diode to prevent reverse current and a resistor to suppress surge voltage, is proposed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional bootstrap circuit is used to step up voltage, then the boost voltage is generated, but the circuit configuration becomes complicated and the boost voltage cannot be easily adjusted
Solution Approach 1:
The patent applies the dynamics principle by making the capacitor values adjustable rather than fixed. The first and second capacitors can be dynamically changed in value to adjust the boost voltage output, allowing the circuit to adapt to different voltage requirements without redesigning the entire circuit structure.
Solution Approach 2:
The patent implements parameter changes by varying the capacitance values of the first and second capacitors. By changing these key parameters, the boost voltage can be precisely controlled and adjusted according to different application requirements, resolving the contradiction between adaptability and complexity.
2Manufacturing precision
If the capacitance values of the first and second capacitors are increased, then the boost voltage can be precisely controlled, but the circuit size and complexity increase
Solution Approach 1:
Instead of using large fixed capacitors that would increase circuit size, the patent employs adjustable capacitors that can dynamically change their values. This allows precise control of the boost voltage without permanently increasing the circuit's physical size or complexity.
Solution Approach 2:
The patent achieves precise voltage control by changing the capacitance parameters of the first and second capacitors. By adjusting these parameters rather than increasing their fixed values, the circuit maintains compact size while achieving the required precision in boost voltage control.
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
The solution enables a straightforward and efficient generation of a boost voltage higher than the power supply voltage, with adjustable ranges for resistors and capacitors to fine-tune the output, enhancing the circuit's applicability and performance in memory devices.
Implementation Method 1
a first capacitor having a first end connected to the first node and a second end to which a first boost pulse is applied; a second capacitor having a first end connected to the second node and a second end to which a second boost pulse having the opposite polarity to the first boost pulse is applied
Data Source
AI summary
Bootstrap circuit includes: a first transistor of first conductivity type having a first main electrode, a second main electrode and a control electrode connected to a first power supply terminal, a first node, and a second node, respectively; a second transistor of the first conductivity type having a first main electrode, a second main electrode, and a control electrode connected to the first power supply terminal, the second node and the first node, respectively; a first capacitor having a first end connected to the first node and a second end where a first boost pulse is applied; a second capacitor having a first end connected to the second node and a second end where a second boost pulse having opposite polarity to the first boost pulse is applied; and a boost output terminal which outputs boost voltage higher than first power supply voltage supplied to the first power supply terminal.