Inventor: Sumant Ranganathan

Address: Sunnyvale, CA
No. of patents: 32
Last patent issue date: 10/09/2012

Number	Title	Issue Date
8286013	Portable communication device with multi-tiered power save operation A system and method for providing multi-tiered power save operation in a portable communication device. A portable communication device may be operated in a first power-save mode. A power-save module of the portable communication device may, for example, provide for...	10/09/2012
8250499	Integrated circuit with on-board power utilization information A system and method for storing power utilization information in an integrated circuit and utilizing such information. Various aspects of the present invention provide an integrated circuit that comprises a first module, which stores power utilization information fo...	08/21/2012
8208462	Line driver for an adaptive hybrid circuit A second output transmission signal (“TX2”) added to a line driver is a scaled version of the main output transmission signal (“TX1”). TX2 is scaled from TX1 by a variable scale factor K. An adaptive hybrid circuit...	06/26/2012
8181045	Power control bus A circuit and method utilizing a power control data bus for implementing power control. Various aspects of the present invention provide an electrical circuit that comprises a power supply circuit that outputs electrical power. The electrical circuit may also compri...	05/15/2012
8145921	Multi-regulator power supply chip with common control bus A system and method for implementing a common control bus in a multi-regulator power supply integrated circuit. The integrated circuit may, for example, comprise first and second power regulator modules that control at least one characteristic of respective power si...	03/27/2012
8072096	Integrated circuit with multiple independent power supply zones An integrated circuit comprising multiple independent power supply zones at substantially the same voltage level and a method for utilizing such power supply zones. An integrated circuit may comprise a first module and may, for example, comprise a second module. A f...	12/06/2011
8018361	Area-efficient analog-to-digital converter The present invention relates generally to analog-to-digital converters (ADCs). Embodiments of the present invention provide novel ADC architectures directed at reducing the overall ADC area and power consumption. Embodiments of the present invention may be used in ...	09/13/2011
8000083	Scalable integrated circuit high density capacitors The present invention provides several scalable integrated circuit high density capacitors and their layout techniques. The capacitors are scaled, for example, by varying the number of metal layers and/or the area of the metal layers used to form the capacitors. The...	08/16/2011
7995679	Method and system for charge sensing with variable gain, offset compensation, and demodulation Provided are a method and system for digitizing a sensor model output signal. The system includes a filter, a demodulator coupled to the filter, a DC offset cancellation mechanism coupled to the demodulator, and an analog to digital converter (ADC). The ADC is direc...	08/09/2011
7978456	Scalable integrated circuit high density capacitors The present invention provides several scalable integrated circuit high density capacitors and their layout techniques. The capacitors are scaled, for example, by varying the number of metal layers and/or the area of the metal layers used to from the capacitors. The...	07/12/2011
7953459	Low power warning in a portable communication device based on predicted device utilization A system and method for providing a low power warning in a portable communication device based on predicted device utilization. Various aspects of the present invention may comprise monitoring power utilization for a portable communication device. A power utilizatio...	05/31/2011
7926008	Integrated circuit with on-board power utilization information A system and method for storing power utilization information in an integrated circuit and utilizing such information. Various aspects of the present invention provide an integrated circuit that comprises a first module, which stores power utilization information fo...	04/12/2011
7925906	Multi-voltage multi-battery power management unit A system and method for implementing a multi-voltage multi-battery power management integrated circuit. Various aspects of the present invention provide a power management integrated circuit. The power management IC may comprise a first regulator module that receive...	04/12/2011
7906955	On-chip current sensing methods and systems A switch regulator module includes a switch and a current sensing module. The switch has an input port and an output port. The current sensing module senses a first voltage at the input port of the switch and a second voltage at the output port of the switch. The cu...	03/15/2011
7750500	Integrated circuit with multiple independent power supply zones An integrated circuit comprising multiple independent power supply zones at substantially the same voltage level and a method for utilizing such power supply zones. An integrated circuit may comprise a first module and may, for example, comprise a second module. A f...	07/06/2010
7707434	Power control bus for carrying power control information indicating a power supply voltage variability A circuit and method utilizing a power control data bus for implementing power control. Various aspects of the present invention provide an electrical circuit that comprises a power supply circuit that outputs electrical power. The electrical circuit may also compri...	04/27/2010
7656643	Scalable integrated circuit high density capacitors The present invention provides several scalable integrated circuit high density capacitors and their layout techniques. The capacitors are scaled, for example, by varying the number of metal layers and/or the area of the metal layers used to form the capacitors. The...	02/02/2010
7573839	Line driver for an adaptive hybrid circuit A second output transmission signal (“TX2”) added to a line driver is a scaled version of the main output transmission signal (“TX1”). TX2 is scaled from TX1 by a variable scale factor K. An adaptive hybrid circuit...	08/11/2009
7548767	Low power warning in a portable communication device based on predicted device utilization A system and method for providing a low power warning in a portable communication device based on predicted device utilization. Various aspects of the present invention may comprise monitoring power utilization for a portable communication device. A power utilizatio...	06/16/2009
7509507	Multi-regulator power supply chip with common control bus A system and method for implementing a common control bus in a multi-regulator power supply integrated circuit. The integrated circuit may, for example, comprise first and second power regulator modules that control at least one characteristic of respective power si...	03/24/2009
7508188	On-chip current sensing methods and systems A switch regulator module includes a switch and a current sensing module. The switch has an input port and an output port. The current sensing module senses a first voltage at the input port of the switch and a second voltage at the output port of the switch. The cu...	03/24/2009
7477100	Method and system for single ended to differential ended demodulation Provided are a method and system for demodulating a signal. The method includes receiving the signal along first and second signal paths within a demodulator having a common starting point. Impedance values along each of the paths are changed alternately in synchron...	01/13/2009
7453943	Hybrid circuit for broadband modems A hybrid circuit that decouples gains for a transmit signal and a receive signal of a broadband modem that is coupled to a telephone line is provided. The hybrid circuit includes a multi-port transformer, a pair of line matching resistors, and a bridge circuit. The ...	11/18/2008
7348838	Method and system for DC offset cancellation from a modulated signal Provided are a method and system for removing an offset direct current (DC) component from an input waveform. The method includes multiplying the input waveform with a demodulation waveform to produce a first differential current signal. An absolute value representa...	03/25/2008
7288990	Reference buffer with dynamic current control A method can allow a system to selectively control increasing of a bias source in a reference buffer or decreasing impedance looking into a output of the reference buffer for a temporary or selective time period, which can result in an increased overall efficiency o...	10/30/2007
7282991	On-chip amplifier/line driver compensation circuit An embodiment of the present invention includes an amplifier on an integrated circuit, with the amplifier having positive and negative inputs, and positive and negative outputs. A first feedback capacitor is on the integrated circuit between the positive input and t...	10/16/2007
7259956	Scalable integrated circuit high density capacitors The present invention provides several scalable integrated circuit high density capacitors and their layout techniques. The capacitors are scaled, for example, by varying the number of metal layers and/or the area of the metal layers used to from the capacitors. The...	08/21/2007
7142036	Amplifier compensation techniques for switched capacitor circuits A system and method are used to maintain a variance in feedback factors of an amplifier between the first and second phases either below a threshold value or within a specified range. The system includes the amplifier and first through third capacitances. The amplif...	11/28/2006
7119585	Sample and hold circuit based on an ultra linear switch A sample and hold circuit including a plurality of input signal sampling switches using native NMOS transistors in combination with switched bulk PMOS transistors. The input signal sampling switches input a differential input signal and output an intermediate differ...	10/10/2006
7098735	Reference buffer with dynamic current control A method can allow a system to selectively control increasing of a bias source in a reference buffer or decreasing impedance looking into a output of the reference buffer for a temporary or selective time period, which can result in an increased overall efficiency o...	08/29/2006
7049990	Single loop feed-forward modulator with summing flash quantizer and multi-bit feedback A sigma-delta modulator includes a summing junction that receives an input signal. A plurality of integrators are arranged in series, the integrators output an integrated signal value to a multi-input quantizer. The multi-input quantizer has a plurality of comparato...	05/23/2006
6943622	Input buffer amplifier with centroidal layout An input buffer amplifier has a symmetrical centroidal layout. The input buffer amplifier includes two half differential amplifiers that have substantially identical layouts. Each half amplifier receives the input signal in-parallel, and the outputs of the different...	09/13/2005

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Inventor: Sumant Ranganathan