Trimmed Temperature Sensor Circuit for Precise Signal Adjustment

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Solution Overview

Problem

Existing electronic systems face challenges in accurately adjusting internal operations based on temperature and light sensing, as current sensor circuits struggle to generate precise temperature sensing signals that can adapt to varying environmental conditions.

Innovation Solution

A temperature sensor system incorporating a first and second trimming resistor, a driving voltage regulator, and a variable voltage generation circuit, which adjusts resistance values based on trimming codes to generate a temperature sensing signal that accurately reflects environmental changes.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If a temperature sensor uses fixed resistance values in existing sensor circuits, then the circuit structure is simple, but the temperature sensing signal precision is insufficient under varying environmental conditions

Engineering Contradiction:

Improvetemperature sensing signal precisionVSAvoidsensor circuit structure

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The patent applies dynamics by replacing fixed resistance values with variable trimming resistors that can be adjusted based on environmental conditions. The first trimming resistor (R1) and second trimming resistor (R2) allow dynamic adjustment of the temperature sensing signal characteristics, enabling the circuit to adapt to varying temperatures and improve measurement precision without requiring a completely complex redesign of the sensor structure.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent implements parameter changes by modifying resistance values of trimming resistors to optimize temperature sensing performance. By changing the resistance parameters of R1 and R2 through trimming operations, the circuit can compensate for environmental variations and maintain high measurement precision across different operating conditions while keeping the overall circuit structure relatively simple.

Inventive Principle:

Principle #35Parameter changes

2Adaptability or versatility

If a temperature sensor uses trimming resistors to adjust voltage levels, then the adaptability to varying temperatures is improved, but the device complexity increases

Engineering Contradiction:

Improveadaptability to varying temperaturesVSAvoidsensor circuit structure

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent applies preliminary action by pre-configuring trimming resistors (R1 and R2) with adjustable resistance values that can be set before operation to match specific environmental conditions. This preliminary adjustment capability allows the temperature sensor to adapt to varying temperatures effectively, while the trimming mechanism itself adds only moderate complexity to the circuit structure.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS12590848B2Temperature sensor and electronic system for executing trimming operations

Publication Date: 2026.03.31 SK HYNIX INC

AI summary

A temperature sensor includes a first trimming resistor having a first resistance value that is trimmed based on a first trimming code and configured to adjust a gate voltage, a MOS transistor turned on based on the gate voltage and configured to drive a variable voltage having a voltage level set for each sensing temperature, and a second trimming resistor connected to the MOS transistor, the second trimming resistor having a second resistance value that is trimmed based on a second trimming code.