TECHNIQUES FOR CURRENT SOURCE ERROR CANCELLATION IN TEMPERATURE SENSOR
卷宗概要
发明人
Michael Keith Mayes; David Edward Bliss; Todd Stuart Kaplan
IPC 分类
CPC 分类
Various techniques are described to accurately measure a ratio between the two currents supplied by a current source in a BJT temperature sensor. In an approach, a resistor is included between the current source and the emitter terminal of the BJT. An analog-to-digital converter (ADC) measures the voltage across the resistor R for each of the two currents. These voltages are used to determine current ratios, which are then used to determine a temperature of the BJT. The techniques are not limited to use with BJTs and are applicable to other semiconductor devices including diodes.
原文（中文）
Various techniques are described to accurately measure a ratio between the two currents supplied by a current source in a BJT temperature sensor. In an approach, a resistor is included between the current source and the emitter terminal of the BJT. An analog-to-digital converter (ADC) measures the voltage across the resistor R for each of the two currents. These voltages are used to determine current ratios, which are then used to determine a temperature of the BJT. The techniques are not limited to use with BJTs and are applicable to other semiconductor devices including diodes.