Temperature sensing device, temperature sensing method and system on chip
By controlling the RC time constants of resistors and capacitors through resistor-capacitor digital-to-analog converter (CDAC) and successive approximation register (SAR) logic circuitry, the challenges of low power consumption and small-area temperature sensing are solved, achieving accurate temperature sensing and reduced power consumption.
CN122408993APending Publication Date: 2026-07-17SAMSUNG ELECTRONICS CO LTD
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- SAMSUNG ELECTRONICS CO LTD
- Filing Date
- 2025-12-30
- Publication Date
- 2026-07-17
AI Technical Summary
Technical Problem
Existing resistive temperature sensors present challenges in low-power and small-area applications, as they struggle to effectively sense temperature and require additional calibration.
Method used
The design employs a resistor-capacitor digital-to-analog converter (CDAC) and incorporates successive approximation register (SAR) logic circuitry. It senses temperature and generates temperature code data by controlling the RC time constants of resistors and capacitors.
Benefits of technology
It realizes a low-power, small-area temperature sensing device that can be driven under low supply voltage and can accurately sense temperature without additional calibration.
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Figure CN122408993A_ABST
Abstract
提供了温度感测装置、温度感测方法和片上系统。温度感测装置包括：第一感测电路，第一感测电路具有选择性地连接到第一电阻器的第一电容器电路；第二感测电路，第二感测电路具有选择性地连接到第二电阻器的第二电容器电路；比较器电路，比较器电路被配置为基于第一节点的第一电压和第二节点的第二电压的比较输出比较信号；以及逐次逼近寄存器（SAR）逻辑电路，被配置为输出以逐次逼近寄存器方式基于比较信号而获得的数字数据。第一感测电路被配置为基于第一控制信号用电源电压对多个第一电容器中的至少一个第一电容器进行充电，并且基于第二控制信号通过第一电阻器和第一节点将多个第一电容器中的至少一个第一电容器放电至接地电压。
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