Patents by Inventor Arun Jayaraman
Arun Jayaraman 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: 20210113099Abstract: Provided herein are medical sensors and related methods for measuring a real-time personal metric. The medical device may comprise an electronic device having a sensor comprising an accelerometer and a bidirectional wireless communication system electronically connected to the electronic device for sending an output signal from the sensor to an external device and receiving commands from an external controller to the electronic device.Type: ApplicationFiled: February 15, 2019Publication date: April 22, 2021Inventors: John A. ROGERS, Shuai XU, Kun Hyuck LEE, Xiaoyue NI, Angela ROBERTS, Bonnie MARTIN-HARRIS, Leora CHERNEY, Arun JAYARAMAN, Edna BABBITT, Megan O'BRIEN
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Patent number: 9055530Abstract: Systems, methods, and devices for saving power in wireless communications devices are described herein. In some aspects, an apparatus includes a memory unit configured to store wake-up information associated with a wake-up time duration for receiving a beacon signal, and includes a processor operationally coupled to the memory unit. The wake-up time duration identifies a time for the processor to wake-up before an expected arrival time of the next beacon signal. The processor may be configured to retrieve the wake-up information from the memory, and vary, over a period of time, the wake-up time duration based on the wake-up information.Type: GrantFiled: December 18, 2012Date of Patent: June 9, 2015Assignee: QUALCOMM IncorporatedInventors: Sandip HomChaudhuri, Jason A. Young, Arun Jayaraman
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Publication number: 20140064166Abstract: Systems, methods, and devices for saving power in wireless communications devices are described herein. In some aspects, an apparatus includes a memory unit configured to store wake-up information associated with a wake-up time duration for receiving a beacon signal, and includes a processor operationally coupled to the memory unit. The wake-up time duration identifies a time for the processor to wake-up before an expected arrival time of the next beacon signal. The processor may be configured to retrieve the wake-up information from the memory, and vary, over a period of time, the wake-up time duration based on the wake-up information.Type: ApplicationFiled: December 18, 2012Publication date: March 6, 2014Applicant: QUALCOMM IncorporatedInventors: Sandip HomChaudhuri, Jason A. Young, Arun Jayaraman
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Patent number: 8179372Abstract: A system and method for efficient computation in the course of locating a position on the face of a touch-screen-equipped display device by limiting the amount of computations to weighted vectors within a range substantially less than the entire range of data input from the touch screen sensors.Type: GrantFiled: September 29, 2008Date of Patent: May 15, 2012Assignee: Integrated Device Technology, Inc.Inventors: Cary L. Delano, Arun Jayaraman
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Publication number: 20120043972Abstract: A capacitive sensing circuit is provided. The capacitive sensing circuit includes a first capacitor and a charge-to-voltage converter circuit coupled to the first capacitor. The charge-to-voltage converter circuit includes a first current source that provides a first current to the first capacitor to charge the first capacitor and generate a time-varying voltage. The capacitive sensing circuit also includes a voltage-to-charge converter circuit coupled to the charge-to-voltage converter circuit, wherein the voltage-to-charge converter circuit samples the time-varying voltage and converts the time-varying voltage into a sampled charge at a predetermined sampling frequency. The capacitive sensing circuit further includes an integrator circuit coupled to the voltage-to-charge circuit, wherein the integrator circuit receives the sampled charge and integrates the sampled charge.Type: ApplicationFiled: August 20, 2010Publication date: February 23, 2012Inventor: Arun JAYARAMAN
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Publication number: 20110242045Abstract: A touch controller to be used by a touch screen device to provide a touch position is disclosed, including a plurality of capacitance sensing channels that each provide an analog signal responsive to a touch on a screen; a channel multiplexer to select at least one of the plurality of channels; an analog-to-digital converter to change the analog signal of the selected capacitance sensing channel to a digital signal; a noise detecting channel coupled to a noise analog-to-digital converter to generate a noise digital signal; a noise blocking timing generation block that combines a time shifted digital signal and a blocking signal, wherein the time shifted digital signal is formed by time shifting the digital signal and the blocking signal is related to the noise signal; a capacitance calculating block coupled to the noise blocking time generation block to calculate capacitance values for each of the capacitance sensing channels; and a position calculation unit to find the touch position on the screen based on tType: ApplicationFiled: April 6, 2010Publication date: October 6, 2011Inventors: TAE KWANG PARK, ARUN JAYARAMAN
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Patent number: 7941115Abstract: A circuit receives a first signal (for example, a baseband signal) and mixes it with a local oscillator (LO) signal, and outputs a second signal (for example, an RFOUT signal). The circuit includes multiple identical Mixer and Frequency Divider Pair (MFDP) circuits. Each MFDP can be enabled separately. Each MFDP includes a mixer and a frequency divider that provides the mixer with a local version of the LO signal. The MFDP outputs are coupled together so that the output power of the second signal (RFOUT) is the combined output powers of the various MFDPs. By controlling the number of enabled MFDPs, the output power of the second signal is controlled. Because the MFDPs all have identical layouts, accuracy of output power step size is improved. Because LO signal power within the circuit automatically changes in proportion to the number of enabled MFDPs, local oscillator leakage problems are avoided.Type: GrantFiled: September 14, 2007Date of Patent: May 10, 2011Assignee: QUALCOMM IncorporatedInventors: Sankaran Aniruddhan, Bo Sun, Arun Jayaraman, Gurkanwal Singh Sahota
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Patent number: 7872543Abstract: A bi-polar modulator that can perform quadrature modulation using amplitude modulators is described. In one design, the bi-polar modulator includes first and second amplitude modulators and a summer. The first amplitude modulator amplitude modulates a first carrier signal with a first input signal and provides a first amplitude modulated signal. The second amplitude modulator amplitude modulates a second carrier signal with a second input signal and provides a second amplitude modulated signal. The summer sums the first and second amplitude modulated signals and provides a quadrature modulated signal that is both amplitude and phase modulated. The first and second input signals may be obtained based on absolute values of first and second modulating signals, respectively. The first and second carrier signals have phases determined based on the sign of the first and second modulating signals, respectively. Each amplitude modulator may be implemented with a class-E amplifier.Type: GrantFiled: June 5, 2008Date of Patent: January 18, 2011Assignee: QUALCOMM, IncorporatedInventors: Gary John Ballantyne, Arun Jayaraman, Bo Sun, Gurkanwal Singh Sahota
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Patent number: 7764127Abstract: This disclosure describes designs for a digitally controlled oscillator (DCO). The DCO can overcome many of the shortcomings associated with conventional voltage controlled oscillators (VCOs), and may improve wireless communication devices. The described DCO may improve the frequency synthesis process, reduce noise in a wireless communication device, and allow for simplification of various components of the device.Type: GrantFiled: November 30, 2006Date of Patent: July 27, 2010Assignee: QUALCOMM, IncorporatedInventors: Bo Sun, Arun Jayaraman, Gary John Ballantyne, Gurkanwal S Sahota
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Patent number: 7750732Abstract: An efficient class-G amplifier having multiple rails is configured with parallel class AB amplifiers powered by at least one rail supplying a voltage that can be varied in response to signal characteristics, typically as sensed at an output across a load. In a specific embodiment, an analog-to-digital converter is coupled to a digital signal processor that converts signals into a programmed voltage level for setting the voltage rail.Type: GrantFiled: December 2, 2008Date of Patent: July 6, 2010Assignee: Fairchild Semiconductor CorporationInventors: Cary L. Delano, Brian B. North, Arun Jayaraman
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Publication number: 20090302963Abstract: A bi-polar modulator that can perform quadrature modulation using amplitude modulators is described. In one design, the bi-polar modulator includes first and second amplitude modulators and a summer. The first amplitude modulator amplitude modulates a first carrier signal with a first input signal and provides a first amplitude modulated signal. The second amplitude modulator amplitude modulates a second carrier signal with a second input signal and provides a second amplitude modulated signal. The summer sums the first and second amplitude modulated signals and provides a quadrature modulated signal that is both amplitude and phase modulated. The first and second input signals may be obtained based on absolute values of first and second modulating signals, respectively. The first and second carrier signals have phases determined based on the sign of the first and second modulating signals, respectively. Each amplitude modulator may be implemented with a class-E amplifier.Type: ApplicationFiled: June 5, 2008Publication date: December 10, 2009Applicant: QUALCOMM INCORPORATEDInventors: Gary John Ballantyne, Arun Jayaraman, Bo Sun, Gurkanwal Singh Sahota
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Patent number: 7564928Abstract: A system and method for designing a broadband tuner such that VCO pulling is minimized and gaps in frequency coverage are avoided, while total power consumption is reduced, is disclosed. A broadband spectrum is divided into sub-bands and various multipliers to a local oscillator output are introduced. In this fashion, the present invention allows a local oscillator within the broadband tuner to always generate signals that lie outside of the broadband spectrum for a particular broadband application. Additionally, a modulus ratio for a dual modulus prescaler with the local oscillator is maximized, thereby reducing power consumption.Type: GrantFiled: June 30, 2005Date of Patent: July 21, 2009Assignee: Conexant Systems, Inc.Inventor: Arun Jayaraman
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Publication number: 20090075689Abstract: A circuit receives a first signal (for example, a baseband signal) and mixes it with a local oscillator (LO) signal, and outputs a second signal (for example, an RFOUT signal). The circuit includes multiple identical Mixer and Frequency Divider Pair (MFDP) circuits. Each MFDP can be enabled separately. Each MFDP includes a mixer and a frequency divider that provides the mixer with a local version of the LO signal. The MFDP outputs are coupled together so that the output power of the second signal (RFOUT) is the combined output powers of the various MFDPs. By controlling the number of enabled MFDPs, the output power of the second signal is controlled. Because the MFDPs all have identical layouts, accuracy of output power step size is improved. Because LO signal power within the circuit automatically changes in proportion to the number of enabled MFDPs, local oscillator leakage problems are avoided.Type: ApplicationFiled: September 14, 2007Publication date: March 19, 2009Applicant: QUALCOMM INCORPORATEDInventors: Sankaran Aniruddhan, Bo Sun, Arun Jayaraman, Gurkanwal Singh Sahota
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Publication number: 20080129398Abstract: This disclosure describes designs for a digitally controlled oscillator (DCO). The DCO can overcome many of the shortcomings associated with conventional voltage controlled oscillators (VCOs), and may improve wireless communication devices. The described DCO may improve the frequency synthesis process, reduce noise in a wireless communication device, and allow for simplification of various components of the device.Type: ApplicationFiled: November 30, 2006Publication date: June 5, 2008Inventors: Bo Sun, Arun Jayaraman, Gary John Ballantyne, Gurkanwal S. Sahota
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Patent number: 6968020Abstract: A system and method for designing a broadband tuner such that VCO pulling is minimized and gaps in frequency coverage are avoided, while total power consumption is reduced, is disclosed. A broadband spectrum is divided into sub-bands and various multipliers to a local oscillator output are introduced. In this fashion, the present invention allows a local oscillator within the broadband tuner to always generate signals that lie outside of the broadband spectrum for a particular broadband application. Additionally, a modulus ratio for a dual modulus prescaler with the local oscillator is maximized, thereby reducing power consumption.Type: GrantFiled: June 6, 2000Date of Patent: November 22, 2005Assignee: Conexant Systems, Inc.Inventor: Arun Jayaraman
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Patent number: 6798288Abstract: A bandpass amplifier for use in a communication system is described. The amplifier includes a frequency selective network having a feedback path. The frequency selective network has first filtering circuitry for selectively passing the transmit band, and second filtering circuitry for selectively passing the receive band. The first filtering circuitry and the second filtering circuitry pass frequencies in the transmit band and reject frequencies in the receive band. A sampling analog-to-digital converter is coupled to the frequency selective network. A switching device is coupled to the sampling analog-to-digital converter for producing a continuous-time output signal. A feedback path is provided for continuously sensing and feeding back the continuous-time output signal to the frequency selective network.Type: GrantFiled: September 25, 2001Date of Patent: September 28, 2004Assignee: Tripath Technology, Inc.Inventors: Arun Jayaraman, Cary L. Delano
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Patent number: 6630899Abstract: A bandpass amplifier for use in a communication system is described. The amplifier includes a filter, a quantizer, a driver, and a feedback loop. The filter filters the input signal, thereby generating a filtered signal. The quantizer quantizes the filtered signal into one of two values, thereby generating a quantized signal. The driver amplifies the quantized signal, thereby generating the output signal. The feedback loop feeds the output signal to the filter. The quantizer has characteristics in which the quantized signal does not fluctuate between the two values when the input signal is substantially stable.Type: GrantFiled: July 18, 2001Date of Patent: October 7, 2003Assignee: Tripath Technology, Inc.Inventor: Arun Jayaraman
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Patent number: 6577189Abstract: A bandpass amplifier for use in a communication system is described. The amplifier includes first and second first-order filters, first and second multipliers, a quantizer, and a driver. In one embodiment, the first and second first-order filters are coupled in series. The first multiplier multiplies a signal from the first first-order filter by a coefficient k1, and the second multiplier multiplies a signal from the second first-order filter by a coefficient k2. The quantizer quantizes a summation of the signals from the first and second multipliers into one of two values, thereby generating a quantized signal. The driver amplifies the quantized signal, and generating an output signal. At least one of the coefficients k1 and k2 is adjusted based on a level of the output signal.Type: GrantFiled: July 18, 2001Date of Patent: June 10, 2003Assignee: Tripath Technology, Inc.Inventors: Arun Jayaraman, Cary L. Delano
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Publication number: 20020102971Abstract: A bandpass amplifier for use in a communication system is described. The amplifier includes a filter, a quantizer, a driver, and a feedback loop. The filter filters the input signal, thereby generating a filtered signal. The quantizer quantizes the filtered signal into one of two values, thereby generating a quantized signal. The driver amplifies the quantized signal, thereby generating the output signal. The feedback loop feeds the output signal to the filter. The quantizer has characteristics in which the quantized signal does not fluctuate between the two values when the input signal is substantially stable.Type: ApplicationFiled: July 18, 2001Publication date: August 1, 2002Applicant: Tripath Technology, Inc.Inventor: Arun Jayaraman
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Publication number: 20020050856Abstract: A bandpass amplifier for use in a communication system is described. The amplifier includes first and second first-order filters, first and second multipliers, a quantizer, and a driver. In one embodiment, the first and second first-order filters are coupled in series. The first multiplier multiplies a signal from the first first-order filter by a coefficient k1, and the second multiplier multiplies a signal from the second first-order filter by a coefficient k2. The quantizer quantizes a summation of the signals from the first and second multipliers into one of two values, thereby generating a quantized signal. The driver amplifies the quantized signal, and generating an output signal. At least one of the coefficients k1 and k2 is adjusted based on a level of the output signal.Type: ApplicationFiled: July 18, 2001Publication date: May 2, 2002Applicant: Tripath Technology, Inc.Inventors: Arun Jayaraman, Cary L. Delano