Qualcomm Incorporated

Wi-lan Inc.

Other

Monument Bank of Intellectual Property, LLC

Intel Corporation

Mobilian Corporation

Nextwave Broadband, Inc.

Todd Robert Sutton

Srikanth Gummadi

Chris M Rosolowski

Kuo-Chun Lee

Joseph Duncan

Houtan Dehesh

Lei Wang

Ron Porat

Bibhu P Mohanty

Noam A Ziv

Gordon P Lee

Juan Faus

Eric Ian Mikuteit

Sandeep Chaman Dhar

Hardik M Patel

Narendra Singh Mehta

Roy G Moss

Orlando Santiago

Gadi Karmi

Lennart Karl Mathe

Hua Guan

Kan Li

Cheong Kun

Marko Harry Koski

Barry R Robbins

Jan Krzys Wegrzyn

Amy Derbyshire

Guolei Yu

Walid Hosseini

Hector Freires Corleto

Rashed Hoque

Zdravko Lukic

David T Clapp

Paul E Bender

Gene Wesley Marsh

Lalan Jee Mishra

Jon James Anderson

Yair Bourlas

Michael Lee McCloud

Lindsay A Weaver, Jr

Christopher K Chun

Troy L Stockstad

Christopher Patrick

Vishal I Gupta

Frederic Bossu

Amit Mahajan

Francis M Ngai

Helena Deirdre O'Shea

Brett Christopher Walker

Christian Gregory Sporck

Chiew-Guan Tan

Christopher Kong Yee Chun

Shadi Hawawini

Srenik Suresh Mehta

Georgios Konstantinos Paparrizos

Prashanth Akula

Roy F Quick

Thomas Domenick Marra

Guoyong Guo

Ali Taha

Iulian Mirea

Giovanni Garcea

Walid M Hamdy

Sherman A Gregory

Farrokh Khatibi

Kendrick H Yuen

Joan T Waltman

Michael McGowan

Charles D Tuten

Venkat Tangirala

Katherine W White

Joshua Zazzera

Curtis Gong

Eric B Zeisel

Mukesh Bansal

Carlos Soledade

Eric L Henderson

Toni Lee Holcman

Chris Rosolowski

Qadeer A Khan

David Coronel

Marko Koski

Allan Lum

Kalpesh Shetye

Douglas A Robbins

Richard Larson

Robert C Ferguson

Steven P Stachwick

Robert C Ottinger

Qadeer Khan

Suzanne M Lueder

David Keitel

Abhijeet V Dharmapurikar

Adrian M Stenzel

Siegfried W Breitmeier

James Stump

Laddan Hashemian

Eric Mikuteit

Hector Corleto

An apparatus is disclosed for adaptive switch driving. In an example aspect, the apparatus includes a switching circuit configured to selectively be in a first state that provides an input voltage as an output voltage, be in a second state that provides a ground voltage as the output voltage, or be in a third state that causes the output voltage to change from the input voltage to the ground voltage according to a slew rate. The third state enables the switching circuit to transition from the first state to the second state. The switching circuit is also configured to adjust the slew rate of the output voltage for the third state responsive to at least one of the following: a change in a magnitude of a direct-current supply voltage or a change in a magnitude of an input current.

Adaptive switch driving

A voltage regulator circuit using predictively precharged voltage rails is generally disclosed. For example, the voltage regulator circuit may include a main switching regulator configured to provide a target voltage, the main switching regulator having a first voltage node, a precharge switching regulator configured to provide a precharge voltage, the precharge switching regulator having a second voltage node, the precharge voltage based on a difference between the target voltage and a next target voltage to be provided by the main switching regulator, and a precharge switch circuit configured to selectively couple the second voltage node to an output voltage node based upon a transition from the target voltage to the next target voltage.

Methods and apparatuses for voltage regulation using predictively charged precharge rails

A battery charging circuit includes a buck converter, a charge pump power converter, a sensor external to or internal to the battery charging circuit, and a control unit. The charge pump power converter includes an output coupled to an output of the buck converter for charging a battery. The sensor is configured to sense a total input current. The control unit receives the total input current that is sensed and compensates for a variation in an input current to the charge pump power converter based on whether the total input current meets a specified current variance.

Wireless parallel charging

A voltage regulator circuit using precharge voltage rails is generally disclosed. For example, the voltage regulator circuit may include a first voltage regulator having a voltage output, an output capacitor coupled to the voltage output, and one or more precharge voltage circuits configured to selectively couple to the voltage output, each of the one or more precharge voltage circuits comprising a capacitor coupled between an output of a precharge voltage regulator and a reference potential.

Methods and apparatuses for voltage regulation using precharge rails

Features and advantages of certain embodiments include a plurality of power supplies that work together to deliver power to a target circuit. In one embodiment, a downstream power supply provides a fast current delivery in response to load current transients and generates a feedback signal to control an upstream power supply so that the upstream and downstream power supplies work together to meet the current and voltage requirements of a target circuit across a wide range of loading conditions.

Power supplies with feedback

A circuit comprising an ECM system is provided. The circuit includes a current monitor circuit configured to monitor the ECM system to measure a set of currents supplied to a set of circuits. The circuit also includes an alert circuit configured to generate an alert based on at least one current of the set of currents in comparison to at least one threshold. The circuit further includes a throttle circuit configured to throttle a performance of at least one circuit in order to decrease the current to the at least one circuit based on the generation of the alert. The current used by the circuit may act as an analogue for the system power used. Accordingly, the current used by the circuit may be used to determine when to throttle one or more aspects of the functionality of the circuit.

Apparatus and methods for embedded current measurements for performance throttling

System, methods, and apparatus are described that facilitate signaling between devices over a single bi-directional line. In an example, the apparatus couples a first device to a second device via a single bi-directional line, indicates initiation of a first action, initiated at the first device, by sending a first single transition on the single bi-directional line from the first device to the second device, and indicates initiation of a second action, initiated at the second device, by sending a second single transition on the single bi-directional line from the second device to the first device. In another example, a first device initiates a first action, indicates initiation of the first action by generating a first event on a single bi-directional line, and receives an indication of a second action initiated at a second device by observing a second event on the single bi-directional line.

Single line PMIC-host low-level control interface

In a wireless communication system, a mobility factor is used to influence handoff. If a subscriber station has been in a low mobility state for some period of time, the system may handoff operation from a first service type to a second service type. If the mobility factor indicates that the subscriber station is moving, the system may handoff operation from the second service type back to the first service type.

Methods and apparatus for performing handoff based on the mobility of a subscriber station

Disclosed is a voltage regulator circuit configured to selectively operate the voltage regulator circuit in a first mode of operation and a second mode of operation. The voltage regulator can change operation of the voltage regulator circuit between the first mode of operation to the second mode of operation in response to a change in a sensed load condition of the voltage regulator circuit. The voltage regulator can change operation from the second mode of operation to the first mode of operation in response to the sensed load condition changing from the second load condition to the first load condition, but only when the sensed load condition has not changed in a given direction between the first load condition and the second load condition for at least a predetermined period of time T.

Voltage regulator having auto mode optimized for load profiles

Methods and apparatus for identifying a subscriber station which is in motion, determining a mobility metric indicative of a level of mobility of the subscriber station and varying or updating one or more operating parameters based on the mobility metric. An apparatus can determine a measure of mobility based on one or a combination of a plurality of factors, such as variations in signal strength, variations in a channel estimate, or variations in phase or frequency of a particular signal or signal component. The one or more measures of mobility can be combined to form a single measure of mobility, the measure of mobility can be quantized to a predetermined number of mobility levels and one or more operating parameters can be varied or adjusted based on the mobility level.

Methods and apparatus for identifying subscriber station mobility

Features and advantages of the present disclosure include a switching regulator and current measurement circuit. In one embodiment, a switching transistor in the switching regulator has a first voltage on a first terminal and a switching voltage on a second terminal. A current measurement circuit has first and second input terminals. A first switch couples the second terminal of the switching transistor to the first terminal of the current measurement circuit when the switching transistor is on, where the second input terminal of the current measurement circuit is coupled to the first terminal of the switching transistor and measurement(s) may be taken. When the switching transistor is off, the first and second input terminals of the current measurement circuit are coupled together, and measurements emulate zero current through the switching transistor.

Current measurments in switching regulators

A low standby power DC-DC converter can be powered down during standby mode. The DC-DC converter can be periodically awakened between sleep cycles to check if the output voltage needs to be recharged (refreshed). The duration of the sleep cycles can be varied to accommodate for changing load conditions that would affect the output voltage.

Reduced sleep current in power converters

The present disclosure includes circuits and methods for controlling skin temperature of an electronic device. In one embodiment, a thermal sensor is configured on a case of a handheld electronic device. The thermal sensor is coupled to a battery charger having a current limit circuit. If the sensed temperature of the case increases above a threshold, a current limit is reduced to reduce current in the battery charger.

Circuits and methods for controlling skin temperature of an electronic device

Growing community of inventors

Del Mar, CA, United States of America

Todd Robert Sutton