High Voltage Generator Circuit Temperature Compensation
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Solution Overview
Problem
Conventional flash memory devices face challenges in maintaining a stable high voltage for source lines, which affects program operations due to variations in peripheral temperature, leading to inefficiencies in Hot Carrier Injection and overall device performance.
Innovation Solution
A high voltage generator circuit that adjusts the high voltage in response to peripheral temperature variations, combined with a source line decoder circuit and control circuit, ensures a stable high voltage is applied to source lines, compensating for voltage drops and maintaining optimal operating conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional high voltage generator circuit is used, then the circuit structure is simple, but the high voltage applied to source lines becomes unstable due to peripheral temperature variations
Solution Approach 1:
The patent implements a feedback mechanism where the high voltage generator circuit monitors the actual high voltage output and compares it with a reference voltage. Based on the comparison result, the circuit automatically adjusts the high voltage output to maintain stability despite temperature variations. This closed-loop feedback system ensures reliable high voltage application without requiring complex external temperature compensation circuits.
Solution Approach 2:
The high voltage generator circuit incorporates self-adjustment capabilities through internal temperature sensing and automatic compensation mechanisms. The circuit detects its own operating conditions and self-corrects voltage drift without external intervention, maintaining stable high voltage output across varying temperatures while keeping the overall device structure relatively simple.
2Productivity
If the high voltage is not stabilized, then the circuit operation is simple, but the program operation efficiency decreases due to variations in Hot Carrier Injection
Solution Approach 1:
The feedback control mechanism continuously monitors high voltage stability and adjusts the generator output to maintain optimal voltage levels for Hot Carrier Injection. This ensures consistent program operation efficiency across temperature ranges without requiring overly complex circuitry, achieving a balance between productivity and device complexity.
Solution Approach 2:
The patent dynamically adjusts voltage parameters based on operating conditions to optimize Hot Carrier Injection efficiency. By modifying the high voltage output parameters in response to temperature changes, the circuit maintains peak program operation efficiency without necessitating a complete redesign of the generator architecture.
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 provides a stable high voltage to source lines, enhancing the reliability and efficiency of program operations in flash memory devices, regardless of temperature changes, thereby improving the overall performance and reliability of the devices.
Implementation Method 1
a pump circuit generating a high voltage in response to an oscillation signal; and a control circuit controlling the oscillation signal so that the high voltage varies in response to a peripheral temperature
Data Source
AI summary
A high voltage generator circuit includes a high voltage generator configured to generate a high voltage; and a control circuit configured to control the high voltage generator so as to vary the high voltage in response to variations of a peripheral temperature.