Integrated ADC Temperature Sensing Circuit With Lower Power
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Solution Overview
Problem
Current bipolar junction transistor (BJT) based temperature sensors have low sensitivity, require auxiliary circuits for higher accuracy, increasing complexity and cost, and consume more power, especially at lower voltages.
Innovation Solution
An analog-to-digital converting circuit with integrated impedance devices that produce a current based on temperature, reducing circuit area and power consumption while enhancing accuracy and lowering costs by eliminating the need for auxiliary circuits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If BJT circuits are used for temperature sensing, then temperature detection can be achieved, but sensitivity is low and auxiliary circuits with higher accuracy are required, resulting in increased circuit complexity and cost
Solution Approach 1:
The patent combines the temperature sensing function with the analog-to-digital converting function into a single integrated circuit. The BJT-based temperature sensor is merged with the ADC unit, eliminating the need for separate auxiliary circuits and reducing overall system complexity while maintaining measurement precision.
Solution Approach 2:
The integrated circuit performs multiple functions: temperature sensing via BJT voltage comparison and analog-to-digital conversion in the same device. This multi-functionality reduces the need for separate auxiliary circuits and lowers system complexity while maintaining accurate temperature measurement.
2Measurement precision
If BJT circuits are used for temperature sensing, then temperature detection can be achieved, but power consumption is increased, especially at lower voltages
Solution Approach 1:
By merging the temperature sensing and ADC functions into one integrated circuit, the patent reduces redundant circuitry and power consumption. The shared circuit elements and integrated architecture minimize energy usage while maintaining measurement precision.
3Measurement precision
If auxiliary circuits with higher accuracy are added to BJT temperature sensors, then measurement precision is improved, but circuit complexity and cost increase
Solution Approach 1:
The patent merges the temperature sensing and ADC functions into a single integrated circuit, eliminating the need for separate auxiliary circuits. This integration maintains measurement precision while reducing overall circuit complexity.
Solution Approach 2:
The integrated circuit performs both temperature sensing and ADC functions in one device, providing multi-functionality that reduces the need for additional auxiliary circuits and lowers system complexity.
4Measurement precision
If BJT circuits are used for temperature sensing, then temperature detection can be achieved, but circuit area is increased
Solution Approach 1:
The patent combines the temperature sensing and ADC circuits into a single integrated structure, reducing the total circuit area required. The merged design eliminates redundant components and optimizes space utilization while maintaining measurement precision.
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 improves temperature sensing accuracy and reduces power consumption and costs by integrating impedance devices into the analog-to-digital converting circuit, enhancing sensitivity and efficiency.
Implementation Method 1
The first impedance device receives a first reference voltage and produces a current according to a temperature
Data Source
AI summary
The present invention relates to an analog-to-digital converting circuit with temperature sensing and the electronic device thereof. The present invention uses a first impedance device to receive a reference voltage and produces an input current according to a temperature. An analog-to-digital converting unit is coupled to the first impedance device and produces a digital output signal according to the input current. Thereby, according to the present invention, by integrating the first impedance device into the analog-to-digital converting circuit, the circuit area and the power consumption can be lowered, which further reduces the cost and improves the accuracy of temperature sensing.