Sensor Circuit Internal Voltage Code Calibration
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Solution Overview
Problem
Existing sensor circuits in electronic devices face challenges in accurately adjusting internal operations based on varying temperature and light intensity conditions due to limitations in calibration methods, leading to inefficiencies in speed and activation control.
Innovation Solution
A sensor circuit comprising a sensing voltage generating circuit, comparison signal generating circuit, and voltage code calibrating circuit that compares sensing voltages with reference voltages to calibrate voltage codes, allowing for precise adjustments in reference voltage levels and optimizing internal operation speed and activation based on sensing conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If existing sensor circuits use traditional calibration methods, then the device structure remains simple, but sensing accuracy is insufficient for varying temperature and light intensity conditions
Solution Approach 1:
The patent merges the calibration function into the existing sensor circuit by integrating a voltage code calibrating circuit that uses the same sensing voltage generating circuit and comparison signal generating circuit. This combination allows the calibration operation to be performed within the existing circuit framework without adding separate calibration hardware, thus improving sensing accuracy while maintaining structural simplicity.
Solution Approach 2:
The sensor circuit performs self-calibration by using its own sensing voltage and comparison signal generating circuits to calibrate the voltage codes. The calibration is achieved through internal operations where the sensing circuit compares sensing voltages under different conditions (temperature and light intensity) and adjusts the voltage codes accordingly, eliminating the need for external calibration equipment or complex separate calibration circuits.
2Measurement precision
If sensor circuits perform accurate calibration for different sensing conditions, then sensing accuracy improves, but current consumption increases
Solution Approach 1:
The calibration operation is performed periodically or at specific moments rather than continuously. The voltage code calibrating circuit executes calibration based on comparison signals generated under specific sensing conditions (such as when temperature or light intensity changes significantly), rather than continuously adjusting, thereby achieving accurate sensing across varying conditions while minimizing unnecessary current consumption during stable operating periods.
3Productivity
If the sensor circuit adjusts internal operations based on sensing conditions, then operational efficiency improves, but the complexity of control increases
Solution Approach 1:
The sensor circuit dynamically adjusts its operation based on real-time sensing conditions by calibrating voltage codes according to temperature and light intensity variations. The comparison signal generating circuit continuously monitors sensing voltages and triggers calibration operations when conditions change, enabling the circuit to adapt its control mechanism dynamically rather than requiring complex predetermined control logic for every possible condition.
Data Source
AI summary
A sensor circuit includes a sensing voltage generating circuit configured to generate a sensing voltage set to have a voltage level corresponding to a sensing condition. The sensor circuit also includes a comparison signal generating circuit configured to compare the sensing voltage with at least one reference voltage to generate at least one comparison signal. The sensor circuit further includes a voltage code calibrating circuit configured to calibrate at least one voltage code for adjusting a voltage level of the reference voltage, based on the at least one comparison signal.