Patents by Inventor Danielle Griffith
Danielle Griffith has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
-
Patent number: 11852663Abstract: 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.Type: GrantFiled: May 25, 2022Date of Patent: December 26, 2023Assignee: TEXAS INSTRUMENTS INCORPORATEDInventors: Rajat Chauhan, Danielle Griffith, Per Torstein Roine, James Murdock, Bernhard Ruck
-
Publication number: 20230188093Abstract: In examples, an electronic device comprises an oscillator circuit configured to provide an output signal and a controller coupled to the oscillator circuit. The controller is configured to receive first and second target rates; dynamically adjust a frequency accuracy of the output signal based on the first target rate; and dynamically adjust an amplitude of the output signal based on the second target rate.Type: ApplicationFiled: December 9, 2022Publication date: June 15, 2023Inventors: Hagen GRAF, Danielle GRIFFITH
-
Publication number: 20220283207Abstract: 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.Type: ApplicationFiled: May 25, 2022Publication date: September 8, 2022Inventors: RAJAT CHAUHAN, DANIELLE GRIFFITH, PER TORSTEIN ROINE, JAMES MURDOCK, BERNHARD RUCK
-
Patent number: 11416015Abstract: A reference generator provides a reference output voltage that is continuously available while providing certain efficiencies of a duty-cycled voltage regulator. The reference output voltage is generated by a sample-and-hold circuit that is coupled to a voltage regulator. On command, the sample-and-hold circuit samples a low dropout voltage regulator that may be referenced by a bandgap circuit. During hold periods of the sample-and-hold circuit, the voltage regulator, in particular the bandgap circuit, may be disabled in order to conserve power. A sample cycle by the sample-and-hold circuit may be triggered by a signal received from a configurable finite state machine. The reference generator is effectively duty cycled in a manner that conserves available battery power, while still providing a constant reference output that is always available. The reference generator is especially suited for low-power, battery operated applications.Type: GrantFiled: July 1, 2020Date of Patent: August 16, 2022Assignee: Texas Instruments IncorporatedInventors: James Murdock, Danielle Griffith, Per Torstein Roine
-
Patent number: 11372032Abstract: 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.Type: GrantFiled: September 27, 2017Date of Patent: June 28, 2022Assignee: TEXAS INSTRUMENTS INCORPORATEDInventors: Rajat Chauhan, Danielle Griffith, Per Torstein Roine, James Murdock, Bernhard Ruck
-
Patent number: 11005419Abstract: 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.Type: GrantFiled: October 23, 2019Date of Patent: May 11, 2021Assignee: Texas Instruments IncorporatedInventors: Kunhee Cho, Danielle Griffith, James Murdock, Per Torstein Roine
-
Publication number: 20200401174Abstract: A reference generator provides a reference output voltage that is continuously available while providing certain efficiencies of a duty-cycled voltage regulator. The reference output voltage is generated by a sample-and-hold circuit that is coupled to a voltage regulator. On command, the sample-and-hold circuit samples a low dropout voltage regulator that may be referenced by a bandgap circuit. During hold periods of the sample-and-hold circuit, the voltage regulator, in particular the bandgap circuit, may be disabled in order to conserve power. A sample cycle by the sample-and-hold circuit may be triggered by a signal received from a configurable finite state machine. The reference generator is effectively duty cycled in a manner that conserves available battery power, while still providing a constant reference output that is always available. The reference generator is especially suited for low-power, battery operated applications.Type: ApplicationFiled: July 1, 2020Publication date: December 24, 2020Inventors: James Murdock, Danielle Griffith, Per Torstein Roine
-
Patent number: 10719096Abstract: A reference generator provides a reference output voltage that is continuously available while providing certain efficiencies of a duty-cycled voltage regulator. The reference output voltage is generated by a sample-and-hold circuit that is coupled to a voltage regulator. On command, the sample-and-hold circuit samples a low dropout voltage regulator that may be referenced by a bandgap circuit. During hold periods of the sample-and-hold circuit, the voltage regulator, in particular the bandgap circuit, may be disabled in order to conserve power. A sample cycle by the sample-and-hold circuit may be triggered by a signal received from a configurable finite state machine. The reference generator is effectively duty cycled in a manner that conserves available battery power, while still providing a constant reference output that is always available. The reference generator is especially suited for low-power, battery operated applications.Type: GrantFiled: August 26, 2016Date of Patent: July 21, 2020Assignee: TEXAS INSTRUMENTS INCORPORATEDInventors: James Murdock, Danielle Griffith, Per Torstein Roine
-
Publication number: 20200059197Abstract: 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.Type: ApplicationFiled: October 23, 2019Publication date: February 20, 2020Inventors: Kunhee Cho, Danielle Griffith, James Murdock, Per Torstein Roine
-
Patent number: 10491155Abstract: 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.Type: GrantFiled: March 15, 2016Date of Patent: November 26, 2019Assignee: TEXAS INSTRUMENTS INCORPORATEDInventors: Kunhee Cho, Danielle Griffith, James Murdock, Per Torstein Roine
-
Publication number: 20190094275Abstract: 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.Type: ApplicationFiled: September 27, 2017Publication date: March 28, 2019Inventors: RAJAT CHAUHAN, DANIELLE GRIFFITH, PER TORSTEIN ROINE, JAMES MURDOCK, BERNHARD RUCK
-
Patent number: 10069501Abstract: 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.Type: GrantFiled: March 15, 2016Date of Patent: September 4, 2018Assignee: TEXAS INSTRUMENTS INCORPORATEDInventors: Kunhee Cho, Danielle Griffith, James Murdock, Per Torstein Roine
-
Publication number: 20180059697Abstract: A reference generator provides a reference output voltage that is continuously available while providing certain efficiencies of a duty-cycled voltage regulator. The reference output voltage is generated by a sample-and-hold circuit that is coupled to a voltage regulator. On command, the sample-and-hold circuit samples a low dropout voltage regulator that may be referenced by a bandgap circuit. During hold periods of the sample-and-hold circuit, the voltage regulator, in particular the bandgap circuit, may be disabled in order to conserve power. A sample cycle by the sample-and-hold circuit may be triggered by a signal received from a configurable finite state machine. The reference generator is effectively duty cycled in a manner that conserves available battery power, while still providing a constant reference output that is always available. The reference generator is especially suited for low-power, battery operated applications.Type: ApplicationFiled: August 26, 2016Publication date: March 1, 2018Inventors: James Murdock, Danielle Griffith, Per Torstein Roine
-
Patent number: 9853651Abstract: Systems and methods of low power docking of sleep mode radios are disclosed herein. In an example embodiment, a crystal oscillator is purposefully mistuned to achieve lower power consumption, and then synchronized using a high frequency crystal oscillator. In an alternative embodiment, the input offset voltages of the comparator in an RC oscillator are cancelled, which allows low power operation and high accuracy performance when tuned to the high frequency crystal. A lower power comparator may be used with higher input offset voltages but still achieve higher accuracy. The RC circuit is switched back and forth on opposite phases of the output, cancelling the offset voltage on the inputs of the comparator.Type: GrantFiled: February 10, 2017Date of Patent: December 26, 2017Assignee: TEXAS INSTRUMENTS INCORPORATEDInventors: Arun Paidimarri, Danielle Griffith, Alice Wang
-
Patent number: 9819368Abstract: A system and method integrates signal filters in a multiband transceiver. A preferred embodiment comprises an amplifier with a first tunable capacitor coupled to a signal input and a tunable filter. The tunable filter comprises an input stage with a first pair of inductors arranged in a dipole configuration and a second tunable capacitor coupled in parallel to the first pair of inductors and an output stage inductively coupled to the input stage, the output stage includes a second pair of inductors also arranged in a dipole configuration and a third tunable capacitor coupled in parallel to the second pair of inductors. The inductors are realized using bond wire or any other high Q material. The first tunable capacitor, the second tunable capacitor, and the third tunable capacitor can be tuned using a master-slave tuning configuration to adjust the operating frequency of the amplifier and the tunable filter to enable frequency band compatibility with multiple communications protocols.Type: GrantFiled: November 5, 2009Date of Patent: November 14, 2017Assignee: TEXAS INSTRUMENTS INCORPORATEDInventors: Naveen Krishna Yanduru, Gregory Eric Howard, Danielle Griffith, Srinivasan Venkatraman
-
Patent number: 9812948Abstract: A method of operating a power up circuit is disclosed. The method includes receiving an input voltage and creating a plurality of sample voltages from the input voltage. One of the sample voltages is selected and compared to a reference voltage. The power up circuit produces a brown-out signal in response to the step of comparing.Type: GrantFiled: March 23, 2015Date of Patent: November 7, 2017Assignee: TEXAS INSTRUMENTS INCORPORATEDInventors: Per Torstein Roine, Stefan Dannenberger, Danielle Griffith
-
Patent number: 9812960Abstract: Methods and apparatus for DC-DC power controller with low standby current and fast transient response. In an example arrangement, an apparatus includes a voltage converter outputting a direct current output voltage, configured to increase the output voltage responsive to an enable control signal; at least one feedback comparator configured to output a first control signal, the feedback comparator being active responsive to an edge at a clock signal input; an adjustable frequency oscillator for outputting a first clock signal; and a fast transient detect circuit configured to output a second signal asynchronously upon detecting a rapid change greater than a voltage threshold in the output voltage; the voltage converter receiving the enable control signal when either the first clock signal is active, or the second signal is active and the output voltage is less than a reference voltage. Additional apparatus and methods are disclosed.Type: GrantFiled: December 29, 2015Date of Patent: November 7, 2017Assignee: TEXAS INSTRUMENTS INCORPORATEDInventors: Keith Edmund Kunz, Vipul Kumar Singhal, Rajat Chauhan, Per Torstein Røine, Danielle Griffith
-
Publication number: 20170272084Abstract: 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.Type: ApplicationFiled: March 15, 2016Publication date: September 21, 2017Inventors: KUNHEE CHO, DANIELLE GRIFFITH, JAMES MURDOCK, PER TORSTEIN ROINE
-
Publication number: 20170272032Abstract: 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.Type: ApplicationFiled: March 15, 2016Publication date: September 21, 2017Inventors: KUNHEE CHO, DANIELLE GRIFFITH, JAMES MURDOCK, PER TORSTEIN ROINE
-
Publication number: 20170187286Abstract: Methods and apparatus for DC-DC power controller with low standby current and fast transient response. In an example arrangement, an apparatus includes a voltage converter outputting a direct current output voltage, configured to increase the output voltage responsive to an enable control signal; at least one feedback comparator configured to output a first control signal, the feedback comparator being active responsive to an edge at a clock signal input; an adjustable frequency oscillator for outputting a first clock signal; and a fast transient detect circuit configured to output a second signal asynchronously upon detecting a rapid change greater than a voltage threshold in the output voltage; the voltage converter receiving the enable control signal when either the first clock signal is active, or the second signal is active and the output voltage is less than a reference voltage. Additional apparatus and methods are disclosed.Type: ApplicationFiled: December 29, 2015Publication date: June 29, 2017Inventors: Keith Edmund Kunz, Vipul Kumar Singhal, Rajat Chauhan, Per Torstein Røine, Danielle Griffith