Temperature-Compensated Oscillator Driver for Low-Power Operation
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Solution Overview
Problem
Conventional crystal oscillator drivers in wireless sensor networks experience high power consumption due to large temperature variations, which reduces battery lifetime in devices operating from battery power.
Innovation Solution
A temperature compensated oscillator driver circuit that uses a power converter or linear regulator to adjust the supply voltage inversely proportional to temperature, reducing power consumption by mitigating increased current loads at higher temperatures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional crystal oscillator drivers are used in wireless sensor networks, then the oscillator can operate at stable frequency, but power consumption increases significantly at high temperatures due to large temperature variation
Solution Approach 1:
The patent changes the supply voltage parameter dynamically based on temperature. A temperature tracking device monitors temperature and adjusts the supply voltage to the oscillator driver inversely proportional to temperature changes. This compensates for the temperature-induced current increase, maintaining stable power consumption and frequency operation across varying temperatures.
2Reliability
If supply voltage is increased to maintain oscillator operation at high temperature, then frequency stability is improved, but power consumption increases reducing battery lifetime
Solution Approach 1:
The patent dynamically adjusts the supply voltage parameter based on temperature tracking. As temperature increases, the supply voltage is reduced inversely proportional to the temperature change, preventing excessive power consumption that would drain the battery. This maintains oscillator operation stability while extending battery lifetime.
3Duration of action of stationary object
If temperature compensation is implemented to reduce power consumption, then battery lifetime is extended, but device complexity increases due to additional temperature tracking components
Solution Approach 1:
The patent introduces a temperature tracking device as an intermediary component that monitors temperature and controls the supply voltage adjustment. This mediator enables automatic temperature compensation without requiring complex control algorithms, extending battery lifetime while adding only necessary minimal complexity.
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 effectively conserves battery life by maintaining low power consumption across varying temperatures, ensuring stable operation of wireless sensor network nodes.
Implementation Method 1
A temperature tracking device in the power converter controls the voltage level of the supply voltage to the supply input of the driver based on temperature such that the supply voltage varies inversely to the temperature of the circuit
Data Source
AI summary
A circuit includes an oscillator having a driver and a resonator. The driver receives a supply voltage at a supply input and provides a drive output to drive the resonator to generate an oscillator output signal. A power converter receives an input voltage and generates the supply voltage to the supply input of the driver. A temperature tracking device in the power converter controls the voltage level of the supply voltage to the supply input of the driver based on temperature such that the supply voltage varies inversely to the temperature of the circuit.