Temperature-Dependent Voltage Regulator with PTAT Circuit
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Solution Overview
Problem
Conventional voltage regulators in portable electronic devices consume excessive power due to constant operation at high voltage levels, even when circuitry functions properly at lower voltages, leading to reduced battery life and increased power consumption.
Innovation Solution
A temperature-dependent voltage regulator that incorporates a proportional to absolute temperature (PTAT) circuit to adjust the reference voltage or regulating current based on temperature, ensuring optimal voltage supply to circuitry while minimizing power consumption by varying output voltage with temperature.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If voltage regulators operate at constant high voltage levels to ensure proper circuitry function, then reliability is improved, but power consumption increases
Solution Approach 1:
The voltage regulator dynamically adjusts its output voltage based on temperature-dependent circuitry requirements. The PTAT circuit generates a temperature-proportional signal that modulates the reference voltage or regulating current, causing the output voltage to vary with temperature. This dynamic adjustment ensures circuitry receives appropriate voltage levels while minimizing power consumption when lower voltages suffice.
Solution Approach 2:
The regulator changes the output voltage parameter as a function of temperature. The PTAT circuit causes the reference voltage or regulating current to vary with temperature, which directly changes the output voltage parameter. This parameter change allows the system to operate at lower voltages when temperature-dependent circuitry requires it, reducing power consumption while maintaining reliability.
2Use of energy by moving object
If voltage regulators reduce output voltage to minimize power consumption, then energy efficiency is improved, but circuitry reliability may deteriorate
Solution Approach 1:
The PTAT circuit provides temperature feedback to the voltage regulator control mechanism. By monitoring temperature and using it to adjust the reference voltage or regulating current, the system receives feedback about thermal conditions that affect circuitry operation. This feedback ensures voltage is reduced only when temperature-dependent circuitry can reliably operate at lower voltages.
Solution Approach 2:
The output voltage parameter is changed as a controlled function of temperature rather than being arbitrarily reduced. The PTAT circuit ensures that voltage reduction follows a predictable temperature-dependent pattern, maintaining reliability by matching voltage levels to the actual thermal and operational state of the circuitry.
3Device complexity
If conventional voltage regulators maintain fixed output voltage, then device complexity is reduced, but adaptability to temperature variations deteriorates
Solution Approach 1:
The PTAT circuit acts as an intermediary between the temperature environment and the voltage regulation mechanism. Rather than directly complex temperature compensation circuits, the PTAT circuit provides a simple temperature-proportional signal that mediates the adjustment of reference voltage or regulating current, achieving temperature adaptation with minimal added complexity.
Solution Approach 2:
The system introduces controlled parameter changes in the reference voltage or regulating current based on temperature. This allows the output voltage to adapt to temperature variations through a straightforward mechanism that modifies electrical parameters rather than requiring complex structural changes to the regulator 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 temperature-dependent voltage regulator reduces power consumption and extends battery life by providing the appropriate voltage levels at different temperatures, optimizing performance and energy efficiency in portable devices.
Implementation Method 1
The regulator further comprises a proportional to absolute temperature (PTAT) circuit coupled to at least one of the output node and the input node. The PTAT circuit is configured to vary at least one of the reference voltage and the regulating current as a function of temperature.
Data Source
AI summary
Systems and methods for reducing power consumption of a voltage regulator are disclosed. In accordance with one embodiment of the present disclosure a voltage regulator comprises an input node configured to receive a reference voltage and an output node configured to output an output voltage. The output voltage is a function of the reference voltage and a regulating current. The regulator further comprises a proportional to absolute temperature (PTAT) circuit coupled to at least one of the output node and the input node. The PTAT circuit is configured to vary at least one of the reference voltage and the regulating current as a function of temperature.