Voltage Regulator Bypass Circuit for Low-Resistance Output
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Solution Overview
Problem
Existing voltage regulators that switch between normal and voltage bypass modes require large circuit areas and complex detection mechanisms due to the need for analog-to-digital conversion, leading to increased cost and power consumption.
Innovation Solution
A voltage regulator design incorporating an amplifier, voltage setting circuit, and power transistor, where the voltage setting circuit increases the driving voltage in voltage bypass mode to reduce conduction resistance, allowing the output voltage to equal the operating power source without the need for complex detection mechanisms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If an analog-to-digital conversion circuit is used to detect and adjust output voltage level, then the output voltage can be precisely controlled, but the circuit area increases and power consumption increases
Solution Approach 1:
The patent extracts and removes the complex analog-to-digital conversion circuit from the voltage regulator system. Instead of using ADC for voltage detection, the invention employs a simplified detection mechanism that directly monitors voltage levels without conversion, thereby eliminating the power consumption and area overhead associated with ADC while maintaining sufficient detection precision for voltage regulation.
Solution Approach 2:
The patent replaces the expensive and power-intensive ADC circuit with a simpler, lower-cost detection mechanism. The simplified circuit uses basic voltage comparison and feedback elements that consume significantly less power and occupy minimal area, achieving the required detection function without the overhead of complex conversion hardware.
2Measurement precision
If an analog-to-digital conversion circuit is used to detect and adjust output voltage level, then the output voltage can be precisely controlled, but the circuit complexity increases
Solution Approach 1:
The patent extracts and removes the complex analog-to-digital conversion circuit from the voltage regulator system. Instead of using ADC for voltage detection, the invention employs a simplified detection mechanism that directly monitors voltage levels without conversion, thereby eliminating the power consumption and area overhead associated with ADC while maintaining sufficient detection precision for voltage regulation.
Solution Approach 2:
The patent inverts the conventional approach by not using ADC to convert analog voltage to digital for processing. Instead, it maintains the detection in the analog domain using simple comparators and feedback circuits, avoiding the complexity of digital conversion and processing while achieving effective voltage control through analog feedback mechanisms.
3Reliability
If the driving voltage on the output terminal is increased in voltage bypass mode, then the conduction resistance of the power transistor decreases, but the circuit needs to dynamically adjust voltage levels
Solution Approach 1:
The patent implements dynamic voltage adjustment through a voltage setting circuit that automatically modifies the driving voltage level based on the operational mode. In voltage bypass mode, the circuit dynamically increases the driving voltage to minimize conduction resistance, while in normal regulation mode, it operates at standard voltage levels. This dynamic adaptation is achieved through mode-detection logic that controls the voltage setting circuit accordingly.
Solution Approach 2:
The patent changes the driving voltage parameter dynamically based on operational mode. The voltage setting circuit adjusts the voltage level applied to the power transistor gate, increasing it in bypass mode to reduce on-resistance and improve current handling capability, while maintaining appropriate voltage levels in regulation mode for precise control. This parameter modulation optimizes performance across different operating conditions.
Data Source
AI summary
A voltage regulator, including an amplifier, a voltage setting circuit and a power transistor, is provided. The amplifier includes a first current source and a second current source. The amplifier has two input terminals to respectively receive a reference voltage and a feedback voltage. The first current source is coupled between the operating power source and an output terminal of the amplifier, and provides a first current to the output terminal. The second current source is coupled between the output terminal and a reference ground terminal, and draws a second current from the output terminal. The voltage setting circuit is coupled to the output terminal, and increases a driving voltage on the output terminal according to the first current in a voltage bypass mode. The power transistor receives the driving voltage and generates an output voltage according to the driving voltage based on the operating power source.