Digital Temperature Sensing Circuit With Switchable Code Resolution
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Solution Overview
Problem
Existing digital temperature sensing circuits in memory systems face challenges in ensuring the reliability of temperature codes, which are sensitive to accuracy and resolution, affecting the overall performance of the memory system.
Innovation Solution
A digital temperature sensing circuit that includes a temperature voltage generator, a code voltage generator, and a mode selector, allowing for output of temperature codes with varying resolutions based on selected modes, enabling fast or slow modes with different bit lengths to optimize accuracy and speed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the digital temperature sensing circuit uses a fixed high-resolution mode, then the measurement precision is improved, but the productivity is reduced due to longer conversion time
Solution Approach 1:
The circuit dynamically switches between first and second conversion modes based on operational requirements. The mode selector circuit changes the resolution of the temperature code output (e.g., between 10-bit and 12-bit modes) to adapt to different speed-accuracy tradeoff needs, making the system flexible rather than fixed
2Productivity
If the digital temperature sensing circuit uses a fixed low-resolution mode, then the productivity is improved, but the measurement precision is reduced
Solution Approach 1:
The circuit allows dynamic selection between different resolution modes. When high speed is needed, the system operates in lower resolution mode; when high accuracy is needed, it switches to higher resolution mode, optimizing performance for different operational scenarios
3Adaptability or versatility
If the circuit provides multiple resolution modes, then the adaptability is improved, but the device complexity is increased
Solution Approach 1:
The temperature sensing circuit is designed to perform multiple functions by incorporating a mode selector that enables different conversion modes within the same circuit architecture. The same basic sensing circuit can operate in both high-speed low-resolution mode and high-accuracy high-resolution mode, making the device versatile without requiring separate circuits for each mode
Solution Approach 2:
The conversion process is segmented into different stages or modes. The circuit divides the temperature sensing function into distinct operational phases (first conversion mode and second conversion mode), each optimized for specific requirements, allowing the system to switch between them based on needs
Data Source
AI summary
The digital temperature sensing circuit includes a temperature voltage generator configured to generate a temperature voltage varying with a temperature in response to a first reference voltage, divide a supply voltage in response to a second reference voltage, and generate a high voltage and a low voltage, a code voltage generator configured to divide the second reference voltage based on the high voltage and the low voltage and output divided voltages having different voltage levels, and a mode selector supplied with the temperature voltage and the divided voltages, and configured to output a first code or a second code in response to a mode select signal, wherein the first code and the second code have different numbers of bits.