公开(公告)号：US09753138B1

公开(公告)日：2017-09-05

申请号：US15097707

申请日：2016-04-13

Applicant: Microsoft Technology Licensing, LLC

Inventor： Dane Snow ,  Barry Thompson ,  Mustansir Mukadam ,  Stefan Wurster ,  Shaun McCarthy

IPC: H04N5/374 ,  G01S17/08 ,  G01K13/00 ,  G01J3/46 ,  H04N13/02 ,  H04N5/3745 ,  H04N5/378

CPC classification number: G01S17/08 ,  G01J3/46 ,  G01K7/01 ,  G01K13/00 ,  G11C27/026 ,  H04N5/37455 ,  H04N5/37457 ,  H04N5/378 ,  H04N13/207 ,  H04N13/246

Abstract: A transducer such as a translinear proportional-to-absolute-temperature sensor uses two amplifiers, where each amplifier is used in a variety of modes. The first amplifier generates a measurement voltage though feedback in an analog circuit. The second amplifier samples and integrates the measurement in a switched-capacitor mode, and the output is stored on a capacitor. Then the first amplifier is set to measure its offset. The offset is sampled and integrated by the second amplifier, and the output is stored on a second capacitor. Then the first and second amplifiers are set to buffer the voltages stored on the capacitors. The measurement can then be offset-adjusted by digital or analog means. The adjusted measurement is then available to be used for calibration of, e.g., an image sensor. Other transducers, such as pressure sensors, strain sensors, gyroscopes, magnetometers, accelerometers, and xyz positioning sensors may employ the same dual amplifier approach.