公开(公告)号：US20200076447A1

公开(公告)日：2020-03-05

申请号：US16399056

申请日：2019-04-30

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Santhosh Kumar Gowdhaman ,  Divya Kaur

IPC: H03M1/78 ,  H01L27/08 ,  G01R19/165

Abstract: A voltage detector circuit is disclosed. The voltage detector circuit includes a ladder selector that includes a first node, a second node and a selector node. The voltage detector circuit also includes a first resistive ladder that includes a first string of resistors coupled between a sensing input node and the first node of the ladder selector and a first set of transistors. An input node of each transistor in the first set of transistors is coupled to a respective intermediate node between two resistors in a subset of resistors in the first string of resistors and an output node of each transistor in the first set of transistors is coupled to a sensing output node. The voltage detector circuit also includes a second resistive ladder that includes a second string of resistors coupled between the sensing input node and the second node of the ladder selector and a second set of transistors.

公开(公告)号：US09853657B2

公开(公告)日：2017-12-26

申请号：US15489124

申请日：2017-04-17

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Eeshan Miglani ,  Karthikeyan Gunasekaran ,  Santhosh Kumar Gowdhaman ,  Shagun Dusad

IPC: H03M3/00 ,  H03M1/06 ,  H03M1/00 ,  H03M1/74 ,  H03M7/30 ,  H03M1/12

CPC classification number: H03M3/50 ,  H03M1/00 ,  H03M1/001 ,  H03M1/0626 ,  H03M1/0665 ,  H03M1/12 ,  H03M1/747 ,  H03M3/30 ,  H03M3/34 ,  H03M3/422 ,  H03M3/458 ,  H03M7/3004

Abstract: The disclosure provides a delta sigma modulator that includes a first input port and a second input port. These ports receive a differential input signal. A DAC is coupled to the first input port and the second input port, and receives a differential feedback signal and a plurality of selection signals. A loop filter generates a differential filtered signal in response to a differential error signal. The differential error signal is proportional to a difference in the differential input signal and the differential feedback signal. A quantizer generates a quantized output signal in response to the differential filtered signal. A modified DWA block coupled between the quantizer and the DAC, generates the plurality of selection signals in response to a chop clock, a regular clock, the quantized output signal and a plurality of selection index signals. A selection index signal is dependent on previously generated plurality of selection signals.

公开(公告)号：US11018686B2

公开(公告)日：2021-05-25

申请号：US16913189

申请日：2020-06-26

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Santhosh Kumar Gowdhaman ,  Divya Kaur

IPC: H03M1/78 ,  G01R19/165 ,  H01L27/08

Abstract: A device for monitoring voltage in a battery-operated system, the device including: a ladder selector configured to select between a first resistive ladder and a second resistive ladder; the first resistive ladder includes: a first string of resistors coupled between a sensing input node and a first node of the ladder selector; and a first set of transistors configured to tap intermediate nodes of a set of resistors in the first string of resistors; the second resistive ladder includes: a second string of resistors coupled between the sensing input node and a second node of the ladder selector; and a second set of transistors configured to tap intermediate nodes of a set of resistors in the second string of resistors; and wherein a selected transistor in one of the first set of transistors or the second set of transistors is turned on, and non-selected transistors of the first set of transistors and the second set of transistors are turned off to set a threshold voltage for a sensing output node.

公开(公告)号：US20170222658A1

公开(公告)日：2017-08-03

申请号：US15489124

申请日：2017-04-17

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Eeshan Miglani ,  Karthikeyan Gunasekaran ,  Santhosh Kumar Gowdhaman ,  Shagun Dusad

IPC: H03M3/00 ,  H03M7/30 ,  H03M1/74 ,  H03M1/06 ,  H03M1/00

CPC classification number: H03M3/50 ,  H03M1/00 ,  H03M1/001 ,  H03M1/0626 ,  H03M1/0665 ,  H03M1/12 ,  H03M1/747 ,  H03M3/30 ,  H03M3/34 ,  H03M3/422 ,  H03M3/458 ,  H03M7/3004

Abstract: The disclosure provides a delta sigma modulator that includes a first input port and a second input port. These ports receive a differential input signal. A DAC is coupled to the first input port and the second input port, and receives a differential feedback signal and a plurality of selection signals. A loop filter generates a differential filtered signal in response to a differential error signal. The differential error signal is proportional to a difference in the differential input signal and the differential feedback signal. A quantizer generates a quantized output signal in response to the differential filtered signal. A modified DWA block coupled between the quantizer and the DAC, generates the plurality of selection signals in response to a chop clock, a regular clock, the quantized output signal and a plurality of selection index signals. A selection index signal is dependent on previously generated plurality of selection signals.

公开(公告)号：US20200328756A1

公开(公告)日：2020-10-15

申请号：US16913189

申请日：2020-06-26

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Santhosh Kumar Gowdhaman ,  Divya Kaur

IPC: H03M1/78 ,  G01R19/165 ,  H01L27/08

Abstract: A device for monitoring voltage in a battery-operated system, the device comprising: a ladder selector configured to select between a first resistive ladder and a second resistive ladder; the first resistive ladder comprising: a first string of resistors coupled between a sensing input node and a first node of the ladder selector; and a first set of transistors configured to tap intermediate nodes of a set of resistors in the first string of resistors; the second resistive ladder comprising: a second string of resistors coupled between the sensing input node and a second node of the ladder selector; and a second set of transistors configured to tap intermediate nodes of a set of resistors in the second string of resistors; and wherein a selected transistor in one of the first set of transistors or the second set of transistors is turned on, and non-selected transistors of the first set of transistors and the second set of transistors are turned off to set a threshold voltage for a sensing output node.

公开(公告)号：US10735020B2

公开(公告)日：2020-08-04

申请号：US16399056

申请日：2019-04-30

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Santhosh Kumar Gowdhaman ,  Divya Kaur

IPC: H03M1/78 ,  G01R19/165 ,  H01L27/08

Abstract: A voltage detector circuit including a ladder selector that includes a first node, a second node and a selector node. The voltage detector circuit also includes a first resistive ladder that includes a first string of resistors coupled between a sensing input node and the first node of the ladder selector and a first set of transistors. An input node of each transistor in the first set of transistors is coupled to a respective intermediate node between two resistors in a subset of resistors in the first string of resistors and an output node of each transistor in the first set of transistors is coupled to a sensing output node. The voltage detector circuit also includes a second resistive ladder that includes a second string of resistors coupled between the sensing input node and the second node of the ladder selector and a second set of transistors.

公开(公告)号：US09660665B2

公开(公告)日：2017-05-23

申请号：US15226436

申请日：2016-08-02

Applicant: Texas Instruments Incorporated

Inventor： Eeshan Miglani ,  Karthikeyan Gunasekaran ,  Santhosh Kumar Gowdhaman ,  Shagun Dusad

IPC: H03M3/00 ,  H03M1/74 ,  H03M1/12 ,  H03M1/00

CPC classification number: H03M3/50 ,  H03M1/00 ,  H03M1/001 ,  H03M1/0626 ,  H03M1/0665 ,  H03M1/12 ,  H03M1/747 ,  H03M3/30 ,  H03M3/34 ,  H03M3/422 ,  H03M3/458 ,  H03M7/3004

Abstract: The disclosure provides a delta sigma modulator that includes a first input port and a second input port. These ports receive a differential input signal. A DAC is coupled to the first input port and the second input port, and receives a differential feedback signal and a plurality of selection signals. A loop filter generates a differential filtered signal in response to a differential error signal. The differential error signal is proportional to a difference in the differential input signal and the differential feedback signal. A quantizer generates a quantized output signal in response to the differential filtered signal. A modified DWA block coupled between the quantizer and the DAC, generates the plurality of selection signals in response to a chop clock, a regular clock, the quantized output signal and a plurality of selection index signals. A selection index signal is dependent on previously generated plurality of selection signals.