Patents by Inventor Dipankar Nag
Dipankar Nag 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).
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Publication number: 20240044954Abstract: The present application relates to current sensing circuitry (100) that comprises a differential amplifier (110) comprising first and second inputs configured to sense a current across a sense resistance, and an output configured to output a current sense signal. The circuitry (100) further comprises a first current source, a second current source and a switch network operable in: a first phase in which the first current source is connected to the first input and disconnected from the output, and the second current source is connected to the output and disconnected from the first input; and a second phase in which the first current source is connected to the output and disconnected from the first input, and the second current source is connected to the first input and disconnected from the output.Type: ApplicationFiled: October 11, 2023Publication date: February 8, 2024Applicant: Cirrus Logic International Semiconductor Ltd.Inventors: Dipankar NAG, Peter HSU, Kapil R. SHARMA, Gordon J. BATES, Simon R. FOSTER, Mark J. MCCLOY-STEVENS
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Patent number: 11835554Abstract: The present application relates to current sensing circuitry (100) that comprises a differential amplifier (110) comprising first and second inputs configured to sense a current across a sense resistance, and an output configured to output a current sense signal. The circuitry (100) further comprises a first current source, a second current source and a switch network operable in: a first phase in which the first current source is connected to the first input and disconnected from the output, and the second current source is connected to the output and disconnected from the first input; and a second phase in which the first current source is connected to the output and disconnected from the first input, and the second current source is connected to the first input and disconnected from the output.Type: GrantFiled: December 21, 2020Date of Patent: December 5, 2023Assignee: Cirrus Logic Inc.Inventors: Dipankar Nag, Peter Hsu, Kapil R. Sharma, Gordon J. Bates, Simon R. Foster, Mark J. McCloy-Stevens
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Publication number: 20210333310Abstract: The present application relates to current sensing circuitry (100) that comprises a differential amplifier (110) comprising first and second inputs configured to sense a current across a sense resistance, and an output configured to output a current sense signal. The circuitry (100) further comprises a first current source, a second current source and a switch network operable in: a first phase in which the first current source is connected to the first input and disconnected from the output, and the second current source is connected to the output and disconnected from the first input; and a second phase in which the first current source is connected to the output and disconnected from the first input, and the second current source is connected to the first input and disconnected from the output.Type: ApplicationFiled: December 21, 2020Publication date: October 28, 2021Applicant: Cirrus Logic International Semiconductor Ltd.Inventors: Dipankar NAG, Peter HSU, Kapil R. SHARMA, Gordon J. BATES, Simon R. FOSTER, Mark J. MCCLOY-STEVENS
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Patent number: 10819366Abstract: Various embodiments may provide a delta sigma modulator for generating a digital output voltage. The delta sigma modulator may include a capacitance-to-voltage converter for converting a sensed continuous-in-time applied capacitance signal to a delta analog output voltage signal. The modulator may also include an integrator circuit arrangement configured to generate an analog output voltage signal based on the delta analog output voltage signal. The modulator may additionally include a quantizer circuit arrangement configured to generate the digital output signal based on the analog output voltage signal. The modulator may further include a voltage digital-to-analog converter configured to generate the analog charging voltage based on the digital output signal, thereby generating the delta analog output voltage signal based on the digital output signal.Type: GrantFiled: May 24, 2017Date of Patent: October 27, 2020Assignees: Agency for Science, Technology and Research, Nanyang Technological UniversityInventors: Neelakantan Narasimman, Dipankar Nag, Kevin Tshun Chuan Chai, Tae Hyoung Kim
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Publication number: 20200328757Abstract: Various embodiments may provide a delta sigma modulator for generating a digital output voltage. The delta sigma modulator may include a capacitance-to-voltage converter for converting a sensed continuous-in-time applied capacitance signal to a delta analog output voltage signal. The modulator may also include an integrator circuit arrangement configured to generate an analog output voltage signal based on the delta analog output voltage signal. The modulator may additionally include a quantizer circuit arrangement configured to generate the digital output signal based on the analog output voltage signal. The modulator may further include a voltage digital-to-analog converter configured to generate the analog charging voltage based on the digital output signal, thereby generating the delta analog output voltage signal based on the digital output signal.Type: ApplicationFiled: May 24, 2017Publication date: October 15, 2020Inventors: Neelakantan Narasimman, Dipankar Nag, Kevin Tshun Chuan Chai, Tae Hyoung Kim
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Patent number: 9069367Abstract: A reference voltage generator is described. The reference voltage generator includes a proportional to absolute temperature (PTAT) current source, the PTAT current source being capable of providing a first current that is proportional to a temperature. The reference voltage generator further includes a current mirror comprising a first transistor and a second transistor, the current mirror configured to generate a second current proportional to the first current, wherein a ratio of the first current to the second current is equal to a ratio of a gate width of the first transistor to a gate width of the second transistor. The reference voltage generator further includes a voltage divider, the voltage divider being capable of receiving the second current, the voltage divider capable of outputting a reference voltage, the reference voltage being substantially independent from a change of the temperature.Type: GrantFiled: December 4, 2012Date of Patent: June 30, 2015Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY, LTD.Inventors: Dipankar Nag, Chewn-Pu Jou
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Patent number: 8626469Abstract: A method of calibrating a filter includes applying an input signal into the filter to generate an output signal, measuring a phase difference between the input signal and the output signal; determining a leading/lagging status of the phase difference; calculating a capacitor code (CAP_CODE) using the leading/lagging status; and calibrating the capacitor using the CAP_CODE.Type: GrantFiled: October 19, 2010Date of Patent: January 7, 2014Assignee: Taiwan Semiconductor Manufacturing Company, Ltd.Inventors: Dipankar Nag, Mei-Show Chen, Chewn-Pu Jou
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Patent number: 8344720Abstract: A reference voltage generator includes a proportional to absolute temperature (PTAT) current source and a voltage divider. The PTAT current source is capable of providing a first current that is proportional to a temperature. The voltage divider is capable of receiving a second current that is proportional to the first current. The voltage divider is capable of outputting a reference voltage. The reference voltage is substantially independent from a change of the temperature.Type: GrantFiled: April 29, 2010Date of Patent: January 1, 2013Assignee: Taiwan Semiconductor Manufacturing Company, Ltd.Inventors: Dipankar Nag, Chewn-Pu Jou
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Publication number: 20120095715Abstract: A method of calibrating a filter includes applying an input signal into the filter to generate an output signal, measuring a phase difference between the input signal and the output signal; determining a leading/lagging status of the phase difference; calculating a capacitor code (CAP_CODE) using the leading/lagging status; and calibrating the capacitor using the CAP_CODE.Type: ApplicationFiled: October 19, 2010Publication date: April 19, 2012Applicant: Taiwan Semiconductor Manufacturing Company, Ltd.Inventors: Dipankar Nag, Mei-Show Chen, Chewn-Pu Jou
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Publication number: 20110068766Abstract: A reference voltage generator includes a proportional to absolute temperature (PTAT) current source and a voltage divider. The PTAT current source is capable of providing a first current that is proportional to a temperature. The voltage divider is capable of receiving a second current that is proportional to the first current. The voltage divider is capable of outputting a reference voltage. The reference voltage is substantially independent from a change of the temperature.Type: ApplicationFiled: April 29, 2010Publication date: March 24, 2011Applicant: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY, LTD.Inventors: Dipankar NAG, Chewn-Pu JOU