公开(公告)号：US20220382304A1

公开(公告)日：2022-12-01

申请号：US17395680

申请日：2021-08-06

Applicant: Texas Instruments Incorporated

Inventor： Ryan Wade Selby ,  Shobha Subramanian ,  Hussain Attarwala ,  Keith Eric Sanborn ,  Mihail Gurevitch

IPC: G05D23/20 ,  H05B3/00 ,  H05B1/02 ,  G05D22/02

Abstract: Various examples are provided of low power, rapid response on-device heaters and methods of calibrating the device within a linear operating region, which is reached and maintained through control of the on-device heater. A system to be calibrated includes a sensor to measure the temperature and relative humidity of the system, a heater coupled to the sensor, a heater controller coupled to the heater to control the heater to heat the system, and a processor coupled to the sensor and the heater controller. The processor controls the heater based on temperature measured by the sensor to perform a calibration process for the system including calculating a calibration factor, and to determine whether to abort the calibration process based on relative humidity measured by the sensor indicating that the system is outside the linear operating region.

公开(公告)号：US20230096883A1

公开(公告)日：2023-03-30

申请号：US17491395

申请日：2021-09-30

Applicant: Texas Instruments Incorporated

Inventor： Andrew Nicholas Mason ,  Shobha Subramanian ,  Hussain Kutbuddin Attarwala ,  Ryan Wade Selby

IPC: G01K1/024 ,  G01K1/02 ,  G01K3/00 ,  G01K7/01 ,  G08B21/18

Abstract: An example apparatus includes: a temperature sensor including a temperature output, a register including an input and an output, the input coupled to the temperature output, a subtraction circuit including a first subtraction input, a second subtraction input, and a subtraction output, the first subtraction input coupled to the input of the register, the second subtraction input coupled to the output of the register, a timing circuit including a cycle time input, a shift output, and a direction output, and a division circuit including a division input, a shift input, a direction input, and a divided output, the division input coupled to the subtraction output, the shift input coupled to the shift output, the direction input coupled to the direction output.