Voltage Driver for Non-Volatile Memory Using Matching Transistors
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Solution Overview
Problem
Existing voltage drivers for non-volatile memory lack the ability to provide precise and adaptive operating voltages for different working modes, such as program, erase, and read modes, which requires specialized design to manage varying operating cycles and voltages effectively.
Innovation Solution
A voltage driver design incorporating a voltage divider and matching transistors of the same conductivity type, which generates bias voltages to produce an output voltage that matches target voltages by using a combination of voltage sources and bias voltages, ensuring accurate and efficient voltage delivery to non-volatile memory cells based on their operational mode.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a conventional voltage driver design is used, then the circuit structure is simple, but the voltage precision and adaptability for different working modes are insufficient
Solution Approach 1:
The voltage driver is segmented into multiple functional modules: voltage division module, bias voltage generation module, and output control module. Each module performs a specific function, allowing precise voltage control while maintaining clear structural organization that manages complexity.
Solution Approach 2:
The voltage driver circuit is designed to provide multiple output voltages (Vout1, Vout2, Vout3) suitable for different working modes (program, erase, read) using a unified circuit architecture. The same circuit structure adapts to different modes by adjusting bias voltages and transistor operations, achieving multi-functionality without requiring separate dedicated circuits for each mode.
2Adaptability or versatility
If a specialized voltage driver is designed for each working mode, then the voltage accuracy for each mode is improved, but the device complexity increases
Solution Approach 1:
A single voltage driver circuit provides tailored voltage outputs for program mode (Vout1), erase mode (Vout2), and read mode (Vout3) through unified transistor pairs (M1-M2, M3-M4, M5-M6) and shared voltage division networks. The circuit achieves mode-specific voltage precision by controlling bias voltages and transistor operations rather than using separate dedicated circuits for each mode.
Solution Approach 2:
The voltage driver dynamically adjusts its output characteristics based on the required working mode by changing bias voltages (VB1-VB4) and controlling transistor switching states. This dynamic adaptation allows the same circuit structure to optimize voltage delivery for different operational requirements without physical reconfiguration.
3Adaptability or versatility
If multiple voltage sources are used to provide different operating voltages, then the adaptability for different working modes is improved, but the device complexity and power consumption increase
Solution Approach 1:
Multiple voltage sources (VCC1-VCC6) are merged into a unified voltage driver architecture that shares common components including voltage division networks, transistor pairs, and control logic. This consolidation reduces redundant circuitry and power consumption while maintaining the capability to deliver different voltage levels for different working modes through coordinated operation of the integrated components.
Data Source
AI summary
A voltage driver includes a voltage divider, a first transistor and a second transistor. The voltage divider is connected with a first voltage source and a second voltage source, and generates a first bias voltage. A drain terminal of the first transistor is connected with a third voltage source. A gate terminal of the first transistor is connected with the voltage divider to receive the first bias voltage. A drain terminal of the second transistor is connected with a source terminal of the first transistor. A gate terminal of the second transistor receives a second bias voltage. A source terminal of the second transistor is connected with a fourth voltage source. The first transistor and the second transistor are of the same conductivity type and match each other. The source terminal of the first transistor generates an output voltage.