Patents by Inventor Behrooz Javid
Behrooz Javid 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: 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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Patent number: 9625507Abstract: 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: GrantFiled: February 4, 2014Date of Patent: April 18, 2017Assignee: QUALCOMM IncorporatedInventors: Ozan E. Erdogan, Guozhong Shen, Rajesh Ananthararman, Ajay Taparia, Behrooz Javid, Syed T. Mahmud
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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