Voltage Regulator Temperature Compensation for Stable Output
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Solution Overview
Problem
Existing voltage regulator circuitry struggles to maintain stable output voltage across a wide range of operating temperatures, leading to inefficiencies and increased power consumption due to high quiescent current and process variations.
Innovation Solution
The proposed solution involves the use of pass gate circuitry, process tracker circuitry, and temperature compensation circuitry to generate and compensate the output voltage. The temperature compensation circuitry generates an offset voltage with a positive temperature dependency to counteract the negative temperature dependency of the process tracker circuitry, thereby stabilizing the output voltage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional voltage regulator circuitry is used, then the output voltage can be generated, but the output voltage becomes unstable across wide temperature ranges
Solution Approach 1:
The patent changes the temperature dependency parameter of the offset voltage to be positive (increasing with temperature) to compensate for the negative temperature dependency of the process tracker circuitry. This parameter change enables the output voltage to remain stable across wide temperature ranges by counteracting temperature-induced variations.
Solution Approach 2:
The patent implements a feedback mechanism where the offset voltage is adjusted based on temperature conditions to compensate for process variations. The temperature compensation circuitry monitors and adjusts the offset voltage to maintain stable output voltage, creating a closed-loop system that responds to temperature changes.
2Reliability
If temperature compensation circuitry is added, then output voltage stability improves, but device complexity increases
Solution Approach 1:
The patent segments the voltage regulator into distinct functional blocks: pass gate circuitry, process tracker circuitry, and temperature compensation circuitry. This segmentation allows each block to perform a specific function independently, making the overall complex system manageable and enabling targeted optimization of each segment.
Solution Approach 2:
The offset voltage serves multiple functions: it compensates for process tracker variations, provides temperature compensation, and maintains output voltage stability. By making the offset voltage multi-functional, the patent reduces the need for separate compensation circuits, thereby limiting the increase in device complexity.
3Reliability
If process tracker circuitry is used, then voltage regulation is achieved, but power consumption increases due to high quiescent current
Solution Approach 1:
The patent introduces dynamic adjustment of the offset voltage based on operating conditions, allowing the circuit to adapt its power consumption characteristics. The temperature compensation circuitry dynamically modifies the offset voltage to maintain regulation while minimizing quiescent current, especially during transient conditions.
Solution Approach 2:
The patent changes the operating parameters of the process tracker circuitry by introducing temperature-dependent offset voltage adjustment. This parameter change allows the circuit to maintain voltage regulation while reducing power consumption by optimizing the operating point based on temperature conditions.
Data Source
AI summary
An example apparatus includes: pass gate circuitry having a first terminal and a second terminal; process tracker circuitry having a first terminal and a second terminal, the first terminal of the process tracker circuitry coupled to the first terminal of the pass gate circuitry; and temperature compensation circuitry having a first terminal and a second terminal, the first terminal of the temperature compensation circuitry coupled to the second terminal of the process tracker circuitry, and the second terminal of the temperature compensation circuitry coupled to the second terminal of the pass gate circuitry.