公开(公告)号：US20180360359A1

公开(公告)日：2018-12-20

申请号：US15622846

申请日：2017-06-14

Applicant: Analog Devices Global

Inventor： John Jude O'Donnell ,  Colin G. Lyden ,  Michael C.W. Coln

IPC: A61B5/1455 ,  G01J1/46 ,  G01J1/08 ,  A61B5/00

Abstract: A photometry device can include a first LED to emit light to a target in response to a first current through the first LED, a second LED to emit light to the target in response to a second current through the second LED, and an inductor, coupled to the first and second LEDs, to store energy associated with at least one of the first and second currents.

公开(公告)号：US20190339730A1

公开(公告)日：2019-11-07

申请号：US15969175

申请日：2018-05-02

Applicant: Analog Devices Global Unlimited Company

Inventor： Michael C.W. Coln ,  Michael Mueck ,  Quan Wan ,  Sandeep Monangi

IPC: G05F3/26 ,  H03F1/02 ,  H03F1/30 ,  H03F3/45 ,  H03M1/46 ,  H03M1/12

Abstract: A low-noise, low-power reference voltage circuit can include an operational transconductance amplifier (OTA) with inputs coupled to a temperature-compensated voltage, such as can be provided by source-coupled first and second field-effect transistors (FETs) having different threshold voltages. A capacitive voltage divider can teed back a portion of a reference voltage output by the OTA to the inputs of the OTA to help establish or maintain the temperature-compensated voltage across the inputs of the OTA. A switching network can be used, such as initialize the capacitive voltage divider or other capacitive feedback circuit, such as during power-down cycles, or when resuming powered-on cycles. A switch can interrupt current to the OTA during the power-down cycles to save power. The cycled voltage reference circuit can provide a reference voltage to an ADC reservoir capacitor. Powering down can occur during analog input signal sampling, during successive approximation routine (SAR) conversion, or both.

公开(公告)号：US20210067160A1

公开(公告)日：2021-03-04

申请号：US17080785

申请日：2020-10-26

Applicant: Analog Devices Global Unlimited Company

Inventor： Ying Zhao ,  Alan O'Donnell ,  Michael James Twohig ,  Olly J. Kierse ,  James Sheeran ,  Michael C.W. Coln ,  Paul W. Stevens ,  Bruce A. Hecht ,  Padraig Fitzgerald ,  Mark Schirmer

IPC: H03K17/94 ,  H01L25/16 ,  H01H59/00

Abstract: Optically isolated micromachined (MEMS) switches and related methods are described. The optically isolated MEMS switches described herein may be used to provide isolation between electronic devices. For example, the optically isolated MEMS switches of the types described herein can enable the use of separate grounds between the receiving electronic device and the control circuitry. Isolation of high-voltage signals and high-voltage power supplies can be achieved by using an optical isolator and a MEMS switch, where the optical isolator controls the state of the MEMS switch. In some embodiments, utilizing optical isolators to provide high voltages, the need for electric high-voltage sources such as high-voltage power supplies and charge pumps may be removed, thus removing the cause of potential damage to the receiving electronic device. In one example, the optical isolator and the MEMS switch may be co-packaged on the same substrate.

公开(公告)号：US20190288686A1

公开(公告)日：2019-09-19

申请号：US16137640

申请日：2018-09-21

Applicant: Analog Devices Global Unlimited Company

Inventor： Ying Zhao ,  Alan O'Donnell ,  Michael James Twohig ,  Olly J. Kierse ,  James Thomas Sheeran ,  Michael C.W. Coln ,  Paul W. Stevens ,  Bruce A. Hecht ,  Padraig Fitzgerald Fitzgerald ,  Mark Schirmer

IPC: H03K17/94 ,  H01H59/00 ,  H01L25/16

Abstract: Optically isolated micromachined (MEMS) switches and related methods are described. The optically isolated MEMS switches described herein may be used to provide isolation between electronic devices. For example, the optically isolated MEMS switches of the types described herein can enable the use of separate grounds between the receiving electronic device and the control circuitry. Isolation of high-voltage signals and high-voltage power supplies can be achieved by using an optical isolator and a MEMS switch, where the optical isolator controls the state of the MEMS switch. In some embodiments, utilizing optical isolators to provide high voltages, the need for electric high-voltage sources such as high-voltage power supplies and charge pumps may be removed, thus removing the cause of potential damage to the receiving electronic device. In one example, the optical isolator and the MEMS switch may be co-packaged on the same substrate.

公开(公告)号：US20170331489A1

公开(公告)日：2017-11-16

申请号：US15150910

申请日：2016-05-10

Applicant: Analog Devices Global

Inventor： Dennis A. Dempsey ,  Michael C.W. Coln

IPC: H03M1/78 ,  H01L49/02 ,  H01L23/34 ,  H03F3/45 ,  H03M1/06

Abstract: Many electronic circuits rely on the ratio of one component to other components being well defined. Current flow in component can warm the component causing its electrical properties to change, for example the resistance of a resistor may increase due to self-heating as a result of current flow. The present disclosure provides a way to reduce temperature variation between components so as to reduce electrical mismatch between them or the consequences of such mismatch. This is important as even a change of resistance of, for example, 20-50 ppm in a resistor can result in non-linearity exceeding the least significant bit value of a 16 bit digital to analog converter.