Semiconductor Driver Circuit With Negative Bias Standby Control
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Solution Overview
Problem
Semiconductor apparatus driver circuits face challenges in achieving high energy efficiency and low heat generation, particularly in mobile devices where current consumption and operation reliability need improvement.
Innovation Solution
A driver circuit design that includes a controller to generate a control voltage between two power voltages in response to a stand-by mode signal, allowing the driver to operate with a negative bias and minimize turn-off current by adjusting the preset ratio of a dividing resistance block, thereby reducing current consumption and enhancing reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the driver circuit operates with conventional voltage levels, then the operation is simple, but the current consumption is high and reliability is reduced
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the control voltage level based on operational mode. In stand-by mode, the controller raises the control voltage to a level higher than the power voltage, creating a negative bias condition that minimizes turn-off current. This voltage parameter adjustment directly reduces current consumption while maintaining reliability, as the driver transistor operates in a controlled off-state with reduced leakage current.
2Use of energy by moving object
If the control voltage is increased to reduce turn-off current, then current consumption is reduced, but the complexity of voltage control increases
Solution Approach 1:
The controller is designed to perform multiple functions: it generates the control voltage for the driver transistor, adjusts the voltage level based on operational mode (normal or stand-by), and manages the power voltage distribution. By integrating these functions into a single controller unit, the patent reduces overall system complexity despite the advanced voltage control requirements. The controller universally handles both voltage generation and mode-dependent adjustment, eliminating the need for separate control circuits.
3Use of energy by moving object
If the driver circuit uses fixed voltage levels, then the circuit design is simple, but energy efficiency is poor
Solution Approach 1:
The patent implements dynamics by transitioning from fixed voltage levels to dynamic voltage adjustment. The controller continuously monitors the operational mode and dynamically adjusts the control voltage accordingly. In normal operation, the control voltage operates at standard levels for full performance, while in stand-by mode, it dynamically raises the voltage to create negative bias. This dynamic adaptation optimizes energy efficiency across different operational states while the modular circuit design keeps implementation manageable.
Data Source
AI summary
Provided is a driver circuit of a semiconductor apparatus that is capable of operating with improved reliability and consuming less current. The driver circuit comprises a driver configured to generate an internal voltage using a power voltage in response to a control voltage and a controller configured to change the control voltage to a level higher than a level of the power voltage in response to a stand-by mode signal.