Dual-Loop Voltage Generation for Precise High-Voltage Control
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Solution Overview
Problem
Existing semiconductor memory devices require high-voltage components for generating precise high voltages, which increase circuit area and production costs, and are prone to poor voltage regulation and precision due to temperature and pressure variations.
Innovation Solution
A voltage generating circuit utilizing comparators, boost and output circuits, and feedback mechanisms to control boost and drive voltages independently, reducing the need for high-voltage components and enhancing precision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If high-voltage components (such as potentiometers) are arranged in the voltage generating circuit to generate high voltage with high precision, then the precision of high voltage is improved, but the circuit area increases and production cost increases
Solution Approach 1:
The patent extracts and removes high-voltage components (potentiometers) from the voltage generating circuit. By using a charge pump circuit to generate high voltage directly without requiring potentiometers for voltage division, the circuit area is reduced while maintaining voltage generation precision through the feedback control mechanism involving comparators and voltage regulation.
Solution Approach 2:
The patent replaces mechanical high-voltage components (potentiometers) with an electronic charge pump circuit system. The charge pump uses electronic switching and capacitive energy transfer to generate high voltage, substituting the mechanical adjustment and voltage division approach with an electronic feedback-controlled approach that reduces component count and circuit area.
2Measurement precision
If high-voltage components (such as potentiometers) are arranged in the voltage generating circuit to generate high voltage with high precision, then the precision of high voltage is improved, but production cost increases
Solution Approach 1:
The patent removes expensive high-voltage components (potentiometers) from the circuit, thereby reducing production cost. The charge pump circuit uses standard electronic components that are more cost-effective to manufacture and assemble, while the precision voltage generation is achieved through electronic feedback control rather than precision mechanical components.
Solution Approach 2:
The patent employs a charge pump circuit with switching elements and capacitors that are cheaper and more readily available than precision potentiometers. While individual components may have shorter lifetimes, the overall system cost is reduced, and the circuit can be easily replaced or renewed without complex precision component calibration.
3Power
If high-voltage components are used in the voltage generating circuit, then high voltage can be generated, but the linearity of voltage regulation is poor and precision is reduced under high temperature and high pressure conditions
Solution Approach 1:
The patent implements a feedback control mechanism using comparators that continuously monitor the high voltage output and adjust the charge pump operation accordingly. The first comparator monitors the high voltage from the charge pump, and the second comparator monitors the regulated voltage, creating a closed-loop system that maintains linearity and precision even under varying temperature and pressure conditions by dynamically compensating for environmental effects.
Solution Approach 2:
The patent divides the voltage regulation function into two independent stages: the first comparator and charge pump for high voltage generation, and the second comparator and output circuit for precision voltage regulation. This segmentation allows each stage to be optimized independently, with the first stage handling high voltage generation and the second stage ensuring precision and linearity, thereby improving overall reliability under extreme conditions.
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 circuit achieves precise voltage generation with reduced component usage, minimizing circuit area and production costs while maintaining stability across varying conditions.
Implementation Method 1
The boost circuit is coupled to the first comparator and the first output node, and is controlled by the first control signal to output a boost voltage to the first output node
Implementation Method 2
The output circuit is coupled to the first output node, the second output node and the second comparator, receives the boost voltage, and is controlled by the second control signal to convert the boost voltage into a drive voltage and output the drive voltage to the second output node
Implementation Method 3
The first comparator compares a first reference voltage with a first feedback voltage generated based on a first output node, and generates a first control signal according to the comparison result
Data Source
AI summary
A voltage generating circuit includes a first comparator, a boost circuit, a second comparator and an output circuit. The first comparator compares a first reference voltage with a first feedback voltage generated based on a first output node, and generates a first control signal accordingly. The boost circuit is controlled by the first control signal to output a boost voltage to the first output node. The second comparator compares a second reference voltage with a second feedback voltage generated based on a second output node, and generates a second control signal accordingly. The output circuit receives the boost voltage, and is controlled by the second control signal to convert the boost voltage into a drive voltage and output it to the second output node. The boost voltage is determined by the first reference voltage, the drive voltage is determined by the second reference voltage.