公开(公告)号：US09335223B2

公开(公告)日：2016-05-10

申请号：US13866301

申请日：2013-04-19

Applicant: Texas Instruments Incorporated

Inventor： Mikel K. Ash ,  Krishnaswamy Nagaraj ,  Paul Kimelman ,  Steve Vu

IPC: G01K7/01 ,  G01K7/16

CPC classification number: G01K7/01

Abstract: Methods and circuits for measuring the temperature of a transistor are disclosed. An embodiment of the method includes, providing a current into a circuit, wherein the circuit is connected to the transistor. A variable resistance is connected between the base and collector of the transistor. The circuit has a first mode and a second mode, wherein the current in the first mode flows into the base of the transistor and through the resistance and the current in the second mode flows into the emitter of the transistor. Voltages in both the first mode and the second mode are measured using different resistance settings. The temperature of the transistor is calculated based on the difference between the different voltages.

Abstract translation: 公开了用于测量晶体管的温度的方法和电路。 该方法的实施例包括：向电路提供电流，其中电路连接到晶体管。 可变电阻连接在晶体管的基极和集电极之间。 电路具有第一模式和第二模式，其中第一模式中的电流流入晶体管的基极并通过电阻，并且第二模式中的电流流入晶体管的发射极。 使用不同的电阻设置来测量第一模式和第二模式中的电压。 基于不同电压之间的差值来计算晶体管的温度。

公开(公告)号：US09310823B2

公开(公告)日：2016-04-12

申请号：US14263136

申请日：2014-04-28

Applicant: Texas Instruments Incorporated

Inventor： Xiao Pu ,  Krishnaswamy Nagaraj ,  Yue Hu

IPC: G05F1/10 ,  G05F3/22 ,  G05F3/30

CPC classification number: G05F3/222 ,  G05F3/30

Abstract: A voltage reference circuit includes a bipolar transistor and a circuit configured to measure the ratio of emitter current to base current of the bipolar transistor. The output voltage of the voltage reference circuit is compensated as a function of the measured ratio.

Abstract translation: 电压参考电路包括双极晶体管和被配置为测量双极晶体管的发射极电流与基极电流的比率的电路。 电压参考电路的输出电压作为测量比的函数进行补偿。

公开(公告)号：US20160056831A1

公开(公告)日：2016-02-25

申请号：US14462916

申请日：2014-08-19

Applicant: Texas Instruments Incorporated

Inventor： Joonsung Park ,  Krishnaswamy Nagaraj ,  Mikel Ash

IPC: H03M1/20 ,  H03M1/46

CPC classification number: H03M1/20 ,  H03M1/162 ,  H03M1/38 ,  H03M1/462

Abstract: An enhanced resolution successive-approximation register (SAR) analog-to-digital converter (ADC) is provided that includes a digital-to-analog converter (DAC), a comparator and enhanced resolution SAR control logic. The DAC includes analog circuitry that is configured to convert an M-bit digital input to an analog output. The comparator includes a plurality of coupling capacitors. The enhanced resolution SAR control logic is configured to generate an M-bit approximation of an input voltage and to store a residue voltage in at least one of the coupling capacitors. The residue voltage represents a difference between the input voltage and the M-bit approximation of the input voltage. The enhanced resolution SAR control logic is further configured to generate an N-bit approximation of the input voltage based on the stored residue voltage, where N>M.

Abstract translation: 提供了增强分辨率逐次逼近寄存器（SAR）模数转换器（ADC），其包括数模转换器（DAC），比较器和增强分辨率SAR控制逻辑。 DAC包括配置为将M位数字输入转换为模拟输出的模拟电路。 比较器包括多个耦合电容器。 增强分辨率SAR控制逻辑被配置为产生输入电压的M位近似值，并将剩余电压存储在至少一个耦合电容器中。 残余电压表示输入电压和输入电压的M位近似之间的差。 增强分辨率SAR控制逻辑还被配置为基于存储的残留电压来产生输入电压的N位近似，其中N> M。