Temperature sensor with Δ base-emitter voltage amplification and digital curvature correction
By combining a switched capacitor amplifier and a digital bandgap reference in the temperature sensor, the problems of unstable ADC resolution and reference voltage in analog-to-digital conversion are solved, achieving high-precision, low-power temperature measurement.
CN116124310BActive Publication Date: 2026-05-26ANALOG DEVICES INT UNLTD CO
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- ANALOG DEVICES INT UNLTD CO
- Filing Date
- 2022-11-11
- Publication Date
- 2026-05-26
Smart Images
Figure CN116124310B_ABST
Abstract
This disclosure relates to a temperature sensor with Δ base-emitter voltage amplification and digital curvature correction. The invention provides systems, apparatus, and methods related to temperature sensors for use in electronic devices. An example temperature sensor apparatus includes: an analog temperature sensor circuit for generating a plurality of voltages indicating temperature; an analog-to-digital converter (ADC) disposed downstream of the analog temperature sensor circuit; a switched-capacitor amplifier circuit disposed before the ADC, the switched-capacitor amplifier circuit including a single-ended amplifier to amplify the plurality of voltages relative to a common voltage; a first switch coupled between the analog temperature sensor circuit and the switched-capacitor amplifier circuit to provide a sampling period and an integration period; and digital computing circuitry for calculating a temperature value based on the plurality of amplified voltages.
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