公开(公告)号：US20170272084A1

公开(公告)日：2017-09-21

申请号：US15070810

申请日：2016-03-15

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： KUNHEE CHO ,  DANIELLE GRIFFITH ,  JAMES MURDOCK ,  PER TORSTEIN ROINE

IPC: H03L5/00 ,  H03B5/08 ,  H04W84/18 ,  H03B5/32

CPC classification number: H03L5/00 ,  H03B1/00 ,  H03B5/00 ,  H03B5/08 ,  H03B5/32 ,  H03B5/36 ,  H03B2201/031 ,  H03L1/022 ,  H03L1/028 ,  H03L7/099 ,  H04W84/18

Abstract: A circuit includes an oscillator having a driver and a resonator. The driver receives a supply voltage at a supply input and provides a drive output to drive the resonator to generate an oscillator output signal. A power converter receives an input voltage and generates the supply voltage to the supply input of the driver. The power converter varies the supply voltage based on an adjust command supplied to a command input of the power converter. A detector monitors a voltage level of the oscillator output signal. A controller sets the adjust command to the power converter to control the supply voltage to the supply input of the driver such that the voltage level of the oscillator output signal is set at or above a predetermined threshold voltage.

公开(公告)号：US20160182021A1

公开(公告)日：2016-06-23

申请号：US14581183

申请日：2014-12-23

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： PER TORSTEIN ROINE

IPC: H03K3/03

CPC classification number: H03K3/0315

Abstract: A circuit includes a ring oscillator that includes a plurality of delay stages coupled in series to generate an output frequency for the ring oscillator. A capacitive array is operatively coupled between a supply rail and a power rail for each of the delay stages to supply power to the delay stages. The capacitive array selectively adjusts the output frequency of the ring oscillator via a capacitive setting of the capacitive array.

Abstract translation: 电路包括环形振荡器，其包括串联耦合的多个延迟级以产生环形振荡器的输出频率。 电容阵列可操作地耦合在用于每个延迟级的电源轨和电源轨之间以向延迟级供电。 电容阵列通过电容阵列的电容设置选择性地调节环形振荡器的输出频率。

公开(公告)号：US20150333694A1

公开(公告)日：2015-11-19

申请号：US14584726

申请日：2014-12-29

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： DANIELLE GRIFFITH ,  PER TORSTEIN ROINE ,  JAMES MURDOCK ,  RYAN SMITH

IPC: H03B5/06 ,  H03B5/36

CPC classification number: H03B5/06 ,  H03B5/362 ,  H03B5/364 ,  H03B5/368

Abstract: A circuit includes a crystal oscillator to generate an output frequency for a circuit. A driving oscillator generates a startup signal having a driving frequency that is provided to activate the crystal oscillator. The driving frequency of the startup signal is varied over a range of frequencies that encompass the operating frequency of the crystal oscillator to facilitate startup of the crystal oscillator.

Abstract translation: 电路包括用于产生电路的输出频率的晶体振荡器。 驱动振荡器产生具有提供以激活晶体振荡器的驱动频率的启动信号。 启动信号的驱动频率在包含晶体振荡器的工作频率的频率范围内变化以便于启动晶体振荡器。

公开(公告)号：US20220283207A1

公开(公告)日：2022-09-08

申请号：US17824505

申请日：2022-05-25

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： RAJAT CHAUHAN ,  DANIELLE GRIFFITH ,  PER TORSTEIN ROINE ,  JAMES MURDOCK ,  BERNHARD RUCK

IPC: G01R19/257 ,  H03M1/66 ,  G01R31/3835

Abstract: One example relates to a monitoring circuit that includes a capacitive digital-to-analog converter that receives a binary code, a reference voltage, a monitored voltage, and a ground reference, the capacitive digital-to-analog converter outputting an analog signal based on the binary code, the reference voltage, the monitored voltage, and the ground reference. The monitoring circuit further includes a comparator including a first input coupled to receive the analog signal and a second input coupled to the reference voltage, the comparator comparing the analog signal to the reference voltage and outputting a comparator signal based on the comparison. The monitoring circuit yet further includes a binary code generator that generates the binary code based on the comparator signal, the binary code approximating a magnitude of the monitored voltage.

公开(公告)号：US20190094275A1

公开(公告)日：2019-03-28

申请号：US15717219

申请日：2017-09-27

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： RAJAT CHAUHAN ,  DANIELLE GRIFFITH ,  PER TORSTEIN ROINE ,  JAMES MURDOCK ,  BERNHARD RUCK

IPC: G01R19/257 ,  G01R31/36 ,  H03M1/66

Abstract: One example relates to a monitoring circuit that includes a capacitive digital-to-analog converter that receives a binary code, a reference voltage, a monitored voltage, and a ground reference, the capacitive digital-to-analog converter outputting an analog signal based on the binary code, the reference voltage, the monitored voltage, and the ground reference. The monitoring circuit further includes a comparator including a first input coupled to receive the analog signal and a second input coupled to the reference voltage, the comparator comparing the analog signal to the reference voltage and outputting a comparator signal based on the comparison. The monitoring circuit yet further includes a binary code generator that generates the binary code based on the comparator signal, the binary code approximating a magnitude of the monitored voltage.

公开(公告)号：US20170272032A1

公开(公告)日：2017-09-21

申请号：US15070742

申请日：2016-03-15

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： KUNHEE CHO ,  DANIELLE GRIFFITH ,  JAMES MURDOCK ,  PER TORSTEIN ROINE

IPC: H03B5/04 ,  H03B5/36

CPC classification number: H03B5/04 ,  H03B5/00 ,  H03B5/08 ,  H03B5/32 ,  H03B5/36 ,  H03L1/00 ,  H03L1/022 ,  H03L1/028 ,  H03L5/00

Abstract: A circuit includes an oscillator having a driver and a resonator. The driver receives a supply voltage at a supply input and provides a drive output to drive the resonator to generate an oscillator output signal. A power converter receives an input voltage and generates the supply voltage to the supply input of the driver. A temperature tracking device in the power converter controls the voltage level of the supply voltage to the supply input of the driver based on temperature such that the supply voltage varies inversely to the temperature of the circuit.