Patents by Inventor Rajesh Anantharaman
Rajesh Anantharaman 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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Patent number: 11375306Abstract: This disclosure includes several different features suitable for use in circumaural and supra-aural headphones designs. Designs that include earpad assemblies that improve acoustic isolation are discussed. User convenience features that include automatically detecting the orientation of the headphones on a user's head are also discussed. Various power-saving features, design features, sensor configurations and user comfort features are also discussed.Type: GrantFiled: May 19, 2020Date of Patent: June 28, 2022Assignee: Apple Inc.Inventors: Esge B. Andersen, Miikka O. Tikander, Jared M. Kole, Daniel R. Bloom, Onur I. Ilkorur, Eugene Antony Whang, Christopher S. Erickson, Rajesh Anantharaman, Edwin J. Corona Aparicio
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Patent number: 11134328Abstract: This disclosure includes several different features suitable for use in circumaural and supra-aural headphones designs. Designs that include earpad assemblies that improve acoustic isolation are discussed. User convenience features that include automatically detecting the orientation of the headphones on a user's head are also discussed. Various power-saving features, design features, sensor configurations and user comfort features are also discussed.Type: GrantFiled: May 19, 2020Date of Patent: September 28, 2021Assignee: Apple Inc.Inventors: Jared M. Kole, Daniel R. Bloom, Audrey L. Sheng, Tian Shi Li, Eugene Antony Whang, Edward Siahaan, Phillip Qian, Alex C. Hellwig, Oliver M. Hewitt, Yuta Kuboyama, Christopher S. Erickson, Sneha Kadetotad, Edwin J. Corona Aparicio, Rajesh Anantharaman, Jacob E. Mattingley, Tsu-Hui Lin, Robert D. Zupke, Dustin A. Hatfield, Axit H. Patel
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Patent number: 10976796Abstract: Aspects of the disclosure are directed to self-capacitance measurement and cancellation. In accordance with one aspect, a self-capacitance cancellation circuit includes an input amplifier, wherein the input amplifier comprises a non-inverting input, an inverting input and an output; a coherent current source coupled to the inverting input; a feedback network coupled to the output; and a capacitance coupled to the inverting input.Type: GrantFiled: July 19, 2018Date of Patent: April 13, 2021Assignee: Qualcomm IncorporatedInventors: Rajesh Anantharaman, Ajay Taparia, Shunxi Wang
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Publication number: 20200280786Abstract: This disclosure includes several different features suitable for use in circumaural and supra-aural headphones designs. Designs that include earpad assemblies that improve acoustic isolation are discussed. User convenience features that include automatically detecting the orientation of the headphones on a user's head are also discussed. Various power-saving features, design features, sensor configurations and user comfort features are also discussed.Type: ApplicationFiled: May 19, 2020Publication date: September 3, 2020Applicant: Apple Inc.Inventors: Jared M. Kole, Daniel R. Bloom, Audrey L. Sheng, Tian Shi Li, Eugene Antony Whang, Edward Siahaan, Phillip Qian, Alex C. Hellwig, Oliver M. Hewitt, Yuta Kuboyama, Christopher S. Erickson, Sneha Kadetotad, Edwin J. Corona Aparicio, Rajesh Anantharaman, Jacob E. Mattingley, Tsu-Hui Lin, Robert D. Zupke, Dustin A. Hatfield, Axit H. Patel
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Publication number: 20200280801Abstract: This disclosure includes several different features suitable for use in circumaural and supra-aural headphones designs. Designs that include earpad assemblies that improve acoustic isolation are discussed. User convenience features that include automatically detecting the orientation of the headphones on a user's head are also discussed. Various power-saving features, design features, sensor configurations and user comfort features are also discussed.Type: ApplicationFiled: May 19, 2020Publication date: September 3, 2020Applicant: Apple Inc.Inventors: Esge B. Andersen, Miikka O. Tikander, Jared M. Kole, Daniel R. Bloom, Onur I. Ilkorur, Eugene Antony Whang, Christopher S. Erickson, Rajesh Anantharaman, Edwin J. Corona Aparicio
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Patent number: 10557724Abstract: An angular detection system including a magnet and sensors is disclosed. The magnet can be located on a rotating component and the sensors can be located on a stationary component, or vice versa. The magnet can generate a plurality of magnetic flux lines. The plurality of sensors can be located and spatially separated along the motion path of the magnet for detecting the magnetic flux densities. The strength of the magnetic flux lines sensed by a given sensor can be used to determine the location of the magnet along its motion path. The plurality of sensors can generate one or more signals indicative of the strength of the sensed magnetic field lines. Based on the strength of the magnetic flux lines, the location of the magnet, or both, the system can determine the angle of rotation of the device by using a polynomial function or a look-up table.Type: GrantFiled: September 28, 2018Date of Patent: February 11, 2020Assignee: Apple Inc.Inventors: Manoj K. Bhattacharyya, Daniel Ray Bloom, Rajesh Anantharaman
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Publication number: 20190034002Abstract: Aspects of the disclosure are directed to self-capacitance measurement and cancellation. In accordance with one aspect, a self-capacitance cancellation circuit includes an input amplifier, wherein the input amplifier comprises a non-inverting input, an inverting input and an output; a coherent current source coupled to the inverting input; a feedback network coupled to the output; and a capacitance coupled to the inverting input.Type: ApplicationFiled: July 19, 2018Publication date: January 31, 2019Inventors: Rajesh ANANTHARAMAN, Ajay TAPARIA, Shunxi WANG
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Patent number: 9857932Abstract: An analog front end circuit utilizes coherent detection within a capacitance measurement application. The analog front end circuit uses coherent detection to measure capacitance of a touch screen display. An analog excitation signal is modulated by a capacitor to be measured. The modulated signal is synchronously demodulated using a correlator, which includes a discrete mixer and a discrete integrator. The excitation signal is also input to the mixer such that the modulated signal is multiplied by the excitation signal. The excitation signal is an analog signal having a sine wave function or other waveform.Type: GrantFiled: March 31, 2017Date of Patent: January 2, 2018Assignee: QUALCOMM IncorporatedInventors: Ozan E. Erdogan, Guozhong Shen, Rajesh Anantharaman, Ajay Taparia, Behrooz Javid, Syed T. Mahmud, Rahim F. Chowdhury
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Patent number: 9846186Abstract: An analog front end circuit utilizes coherent detection within a capacitance measurement application. The analog front end circuit uses coherent detection to measure capacitance of a touch screen display. An analog excitation signal is modulated by a capacitor to be measured. The modulated signal is synchronously demodulated using a correlator, which includes a discrete mixer and a discrete integrator. The excitation signal is also input to the mixer such that the modulated signal is multiplied by the excitation signal. The excitation signal is an analog signal having a sine wave function or other waveform.Type: GrantFiled: November 3, 2014Date of Patent: December 19, 2017Assignee: QUALCOMM IncorporatedInventors: Ozan E. Erdogan, Guozhong Shen, Rajesh Anantharaman, Ajay Taparia, Behrooz Javid, Syed T. Mahmud, Rahim F. Chowdhury
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Publication number: 20170205948Abstract: An analog front end circuit utilizes coherent detection within a capacitance measurement application. The analog front end circuit uses coherent detection to measure capacitance of a touch screen display. An analog excitation signal is modulated by a capacitor to be measured. The modulated signal is synchronously demodulated using a correlator, which includes a discrete mixer and a discrete integrator. The excitation signal is also input to the mixer such that the modulated signal is multiplied by the excitation signal. The excitation signal is an analog signal having a sine wave function or other waveform.Type: ApplicationFiled: March 31, 2017Publication date: July 20, 2017Inventors: Ozan E. Erdogan, Guozhong Shen, Rajesh Anantharaman, Ajay Taparia, Behrooz Javid, Syed T. Mahmud, Rahim F. Chowdhury
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Publication number: 20150048851Abstract: An analog front end circuit utilizes coherent detection within a capacitance measurement application. The analog front end circuit uses coherent detection to measure capacitance of a touch screen display. An analog excitation signal is modulated by a capacitor to be measured. The modulated signal is synchronously demodulated using a correlator, which includes a discrete mixer and a discrete integrator. The excitation signal is also input to the mixer such that the modulated signal is multiplied by the excitation signal. The excitation signal is an analog signal having a sine wave function or other waveform.Type: ApplicationFiled: November 3, 2014Publication date: February 19, 2015Inventors: Ozan E. Erdogan, Guozhong Shen, Rajesh Anantharaman, Ajay Taparia, Behrooz Javid, Syed T. Mahmud, Chowdhury F. Rahim
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Patent number: 8878797Abstract: An analog front end circuit utilizes coherent detection within a capacitance measurement application. The analog front end circuit uses coherent detection to measure capacitance of a touch screen display. An analog excitation signal is modulated by a capacitor to be measured. The modulated signal is synchronously demodulated using a correlator, which includes a discrete mixer and a discrete integrator. The excitation signal is also input to the mixer such that the modulated signal is multiplied by the excitation signal. The excitation signal is an analog signal having a sine wave function or other waveform.Type: GrantFiled: February 23, 2012Date of Patent: November 4, 2014Assignee: Maxim Integrated Products, Inc.Inventors: Ozan E. Erdogan, Guozhong Shen, Rajesh Anantharaman, Ajay Taparia, Behrooz Javid, Syed T. Mahmud, Rahim Chowdhury
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Publication number: 20140152328Abstract: A system includes a signal generator and a correlator. The signal generator outputs a first signal to a first end of a capacitance to be measured. The correlator is connected to an output of the signal generator that outputs the first signal and to a second end of the capacitance. The correlator receives the first signal from the output of the signal generator and receives a second signal from the second end of the capacitance. The correlator correlates the first signal and the second signal and generates an output signal based on a correlation between the first signal and the second signal. The output signal is proportional to a capacitance value of the capacitance.Type: ApplicationFiled: February 4, 2014Publication date: June 5, 2014Applicant: Maxim Integrated Products, Inc.Inventors: Ozan E. Erdogan, Guozhong Shen, Rajesh Anantharaman, Ajay Taparia, Behrooz Javid, Syed T. Mahmud
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Patent number: 8659343Abstract: A mixed signal correlator utilizes coherent detection within a capacitance measurement application. In some applications, the mixed signal correlator is used to measure capacitance of a touch screen display. An external capacitor whose capacitance is measured is kept small for improved sensitivity and can be used for a variety of applications having varied integration periods for measurement. The external capacitor is kept small and can be used for varied applications by adjusting the output voltage within a range that is less than the supply voltage, and maintaining a count of the adjustments to later reconstruct an actual output voltage for the integration period. An output is a weighted sum of an analog integrator output and a digital counter output.Type: GrantFiled: February 24, 2012Date of Patent: February 25, 2014Assignee: Maxim Integrated Products, Inc.Inventors: Ozan E. Erdogan, Guozhong Shen, Rajesh Anantharaman, Ajay Taparia, Behrooz Javid, Syed T. Mahmud
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Patent number: 8643619Abstract: An analog front end circuit utilizes coherent detection within a capacitance measurement application. The analog front end circuit uses coherent detection to measure capacitance of a touch screen display. An analog excitation signal is modulated by a capacitor to be measured. The modulated signal is synchronously demodulated using a correlator, which includes an integrated mixing and integration circuit. The correlator includes a programmable impedance element that generates a time-varying conductance according to a controlling digitized waveform.Type: GrantFiled: February 24, 2012Date of Patent: February 4, 2014Assignee: Maxim Integrated Products, Inc.Inventors: Ozan E. Erdogan, Guozhong Shen, Rajesh Anantharaman, Ajay Taparia, Behrooz Javid, Syed T. Mahmud
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Patent number: 8575988Abstract: A mixed signal correlator utilizes coherent detection within a capacitance measurement application. In some applications, the mixed signal correlator is used to measure capacitance of a touch screen display. An external capacitor whose capacitance is measured is kept small for improved sensitivity and can be used for a variety of applications having varied integration periods for measurement. The external capacitor is kept small and can be used for varied applications by adjusting the output voltage within a range that is less than the supply voltage, and maintaining a count of the adjustments to later reconstruct an actual output voltage for the integration period. An output is a weighted sum of an analog integrator output and a digital counter output.Type: GrantFiled: February 24, 2012Date of Patent: November 5, 2013Assignee: Maxim Integrated Products, Inc.Inventors: Ozan E. Erdogan, Guozhong Shen, Rajesh Anantharaman, Ajay Taparia, Behrooz Javid, Syed T. Mahmud
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Publication number: 20130162586Abstract: An analog front end circuit utilizes coherent detection within a capacitance measurement application. The analog front end circuit uses coherent detection to measure capacitance of a touch screen display. An analog excitation signal is modulated by a capacitor to be measured. The modulated signal is synchronously demodulated using a correlator, which includes a discrete mixer and a discrete integrator. The excitation signal is also input to the mixer such that the modulated signal is multiplied by the excitation signal. The excitation signal is an analog signal having a sine wave function or other waveform.Type: ApplicationFiled: February 23, 2012Publication date: June 27, 2013Applicant: MAXIM INTEGRATED PRODUCTS, INC.Inventors: Ozan E. Erdogan, Guozhong Shen, Rajesh Anantharaman, Ajay Taparia, Behrooz Javid, Syed T. Mahmud, Rahim Chowdhury
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Publication number: 20120274404Abstract: A mixed signal correlator utilizes coherent detection within a capacitance measurement application. In some applications, the mixed signal correlator is used to measure capacitance of a touch screen display. An external capacitor whose capacitance is measured is kept small for improved sensitivity and can be used for a variety of applications having varied integration periods for measurement. The external capacitor is kept small and can be used for varied applications by adjusting the output voltage within a range that is less than the supply voltage, and maintaining a count of the adjustments to later reconstruct an actual output voltage for the integration period. An output is a weighted sum of an analog integrator output and a digital counter output.Type: ApplicationFiled: February 24, 2012Publication date: November 1, 2012Applicant: MAXIM INTEGRATED PRODUCTS, INC.Inventors: Ozan E. Erdogan, Guozhong Shen, Rajesh Anantharaman, Ajay Taparia, Behrooz Javid, Syed T. Mahmud
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Publication number: 20120218223Abstract: An analog front end circuit utilizes coherent detection within a capacitance measurement application. The analog front end circuit uses coherent detection to measure capacitance of a touch screen display. An analog excitation signal is modulated by a capacitor to be measured. The modulated signal is synchronously demodulated using a correlator, which includes an integrated mixing and integration circuit. The correlator includes a programmable impedance element that generates a time-varying conductance according to a controlling digitized waveform.Type: ApplicationFiled: February 24, 2012Publication date: August 30, 2012Applicant: MAXIM INTEGRATED PRODUCTS, INC.Inventors: Ozan E. Erdogan, Guozhong Shen, Rajesh Anantharaman, Ajay Taparia, Behrooz Javid, Syed T. Mahmud
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Publication number: 20120218020Abstract: A mixed signal correlator utilizes coherent detection within a capacitance measurement application. In some applications, the mixed signal correlator is used to measure capacitance of a touch screen display. An external capacitor whose capacitance is measured is kept small for improved sensitivity and can be used for a variety of applications having varied integration periods for measurement. The external capacitor is kept small and can be used for varied applications by adjusting the output voltage within a range that is less than the supply voltage, and maintaining a count of the adjustments to later reconstruct an actual output voltage for the integration period. An output is a weighted sum of an analog integrator output and a digital counter output.Type: ApplicationFiled: February 24, 2012Publication date: August 30, 2012Applicant: MAXIM INTEGRATED PRODUCTS, INC.Inventors: Ozan E. Erdogan, Guozhong Shen, Rajesh Anantharaman, Ajay Taparia, Behrooz Javid, Syed T. Mahmud