Patents Assigned to Conexant Systems, Inc.
  • Patent number: 8847896
    Abstract: A system for controlling a touch screen. A touch screen element having a plurality of contacts, such as one contact electrode at each of four corners. A multiplexer coupled to the touch screen element for forming a plurality of connections, such as various combinations of the contact electrodes to allow measurements to be made of the impedance of the touch screen element from the left side to the right side, from the top to the bottom, and do forth. A touch screen processor coupled to the touch screen element for determining an oscillation frequency of the touch screen element as a function of the electrode connections.
    Type: Grant
    Filed: September 9, 2010
    Date of Patent: September 30, 2014
    Assignee: Conexant Systems, Inc.
    Inventors: Mark E. Miller, George C. Sneed, Ramakrishna Y. Vadapalli, Sudhaker Anumula
  • Publication number: 20140247091
    Abstract: A circuit comprising a peak detector configured to receive a positive voltage input, a negative voltage input and a reference current source input and to output a peak signal data value. A fast attack current source control coupled to the peak detector and configured to generate a current source control signal as a function of the peak signal data value. A slow decay control coupled to the fast attack current source control and configured to reduce the current source control signal based on a predetermined or user-selected decay rate. A variable current source coupled to the fast attack current source control and configured to generate a variable current as a function of the current source control signal. Amplifier circuitry coupled to the variable current source, the amplifier circuitry configured to receive the variable current.
    Type: Application
    Filed: March 4, 2014
    Publication date: September 4, 2014
    Applicant: Conexant Systems, Inc.
    Inventors: Brian W. Friend, Lorenzo Crespi, Kyehyung Lee
  • Publication number: 20140249812
    Abstract: A system for audio processing comprising an initial background statistical model system configured to generate an initial background statistical model using a predetermined sample size of audio data. A parameter computation system configured to generate parametric data for the audio data including cepstral and energy parameters. A background statistics computation system configured to generate preliminary background statistics for determining whether speech has been detected. A first speech detection system configured to determine whether speech was present in the initial sample of audio data. An adaptive background statistical model system configured to provide an adaptive background statistical model for use in continuous processing of audio data for speech detection. A parameter computation system configured to calculate cepstral parameters, energy parameters and other suitable parameters for speech detection.
    Type: Application
    Filed: March 4, 2014
    Publication date: September 4, 2014
    Applicant: Conexant Systems, Inc.
    Inventors: Sahar E. Bou-Ghazale, Trausti Thormundsson, Willie B. Wu
  • Patent number: 8804985
    Abstract: An audio processing system that includes an audio filter having one or more elements capable of having state, such as a capacitor, an inductor or a delay. A saturation detector is configured to detect saturation of the audio filter and to generate an output when saturation of the filter is detected, such as a switch control signal. A switch is connected to the audio filter and the saturation detector, wherein the state of one or more of the elements of the audio filter is changed when the saturation detector provides the output to the switch, such as when the switch shorts the element and causes the energy stored in the element to be dissipated.
    Type: Grant
    Filed: March 3, 2011
    Date of Patent: August 12, 2014
    Assignee: Conexant Systems, Inc.
    Inventor: Christian Larsen
  • Patent number: 8797770
    Abstract: A capacitive voltage converter comprising a switched capacitor array having a voltage input and a voltage output. A skip gating control coupled to the switched capacitor array and configured to control a switching activity of the switched capacitor array. A resistance look-up table coupled to the switched capacitor array and configured to control a resistance value of the switched capacitor array.
    Type: Grant
    Filed: December 6, 2011
    Date of Patent: August 5, 2014
    Assignee: Conexant Systems, Inc.
    Inventors: Matteo Conta, Lorenzo Crespi
  • Patent number: 8779816
    Abstract: A circuit comprising 1) a master delay-locked loop comprising a phase detector for receiving a reference clock and generating an output, control logic for receiving the output from the phase detector and a delta delay input and generating a control output, a clock splitter for receiving the reference clock and generating differential clock output, a delay line for receiving the differential reference clock from the clock splitter and generating n phases of differential reference clock at output, a multiplexer for receiving the output from the delay line and the control logic output and generating a clock output, wherein the phase detector is for receiving the reference clock, and 2) a slave delay-locked loop for receiving the control logic output and a strobe input and generating a delay locked loop output.
    Type: Grant
    Filed: June 17, 2013
    Date of Patent: July 15, 2014
    Assignee: Conexant Systems, Inc.
    Inventors: Santosh Patel, Pradeep Anantula
  • Publication number: 20140176223
    Abstract: A level shifter comprising a first driver transistor for receiving an input signal. A gate-controlled transistor coupled to the first driver transistor. A second driver transistor coupled to the gate controlled transistor. An output coupled to the second driver transistor, wherein the gate-controlled transistor is for receiving a predetermined gate voltage when the output voltage exceeds a predetermined value.
    Type: Application
    Filed: February 25, 2014
    Publication date: June 26, 2014
    Applicant: CONEXANT SYSTEMS, INC.
    Inventors: Lorenzo Crespi, Christian Larsen, Lakshmi P. Murukutla, Ketan B. Patel
  • Publication number: 20140169575
    Abstract: A method for continuously estimating reverberation decay comprising receiving a sequence of audio data samples. Determining whether a plateau is present in the sequence of audio data samples. Generating one or more reverberation parameters from the sequence of audio data samples if it is determined that the plateau is present.
    Type: Application
    Filed: December 13, 2013
    Publication date: June 19, 2014
    Applicant: Conexant Systems, Inc.
    Inventors: Chris X. Gao, Govind Kannan, Youhong Lu, Trausti Thormundsson, Vilhjalmur S. Thorvaldsson
  • Publication number: 20140169249
    Abstract: Systems and methods for coexistence of WLAN and Bluetooth networks are described. At least one embodiment includes a method for operating a wireless device in both a 802.11 network and a Bluetooth network. In accordance with some embodiments, the method comprises monitoring transmission of Synchronous Connection Oriented (SCO) slots over the Bluetooth network, informing an access point (AP) in the 802.11 network not to transmit to the device before the end of an SCO slot, transmitting a power save trigger to the AP to retrieve buffered data from the AP, and transmitting data to the AP.
    Type: Application
    Filed: February 18, 2014
    Publication date: June 19, 2014
    Applicant: CONEXANT SYSTEMS, INC.
    Inventors: Menzo Wentink, Doug Berger, Trent Carter
  • Patent number: 8742901
    Abstract: This disclosure provides systems and methods for detecting a change in environmental conditions utilizing sampling circuitry configured to sample an environmental sensor while a processor remains in a low-power state or a sleep state. According to some embodiments, a pre-filter performs a simplified analysis of the sensor samples to determine if the processor should wake and perform additional analysis on stored sensor samples. Specific examples are provided for detecting motion using passive infrared detectors. Accordingly, systems and methods for reducing the power consumption of a motion detection system are provided herein.
    Type: Grant
    Filed: February 28, 2011
    Date of Patent: June 3, 2014
    Assignee: Conexant Systems, Inc.
    Inventors: Mark E. Miller, Guy Rahamim
  • Publication number: 20140133649
    Abstract: Traditionally, echo cancellation has employed linear adaptive filters to cancel echoes in a two way communication system. The rate of adaptation is often dynamic and varies over time. Disclosed are novel rates of adaptation that perform well in the presence of background noise, during double talk and with echo path changes. Additionally, the echo or residual echo can further be suppressed with non-linear processing performed using joint frequency-time domain processing.
    Type: Application
    Filed: January 21, 2014
    Publication date: May 15, 2014
    Applicant: CONEXANT SYSTEMS, INC.
    Inventors: Youhong Lu, Trausti Thormundsson, Yair Kerner, Ragnar H. Jonsson
  • Patent number: 8724790
    Abstract: Disclosed herein are systems and methods for sending and receiving facsimile transmissions in a voice-over-IP system. In certain embodiments, a facsimile machine may include a network interface and a call set up protocol client configured to interface with a call set up protocol server. The call set up protocol client may communicate with the call set up protocol server using the network interface to establish a communication channel with the public switched telephone network. The call set up protocol client may operate according to the session initiation protocol. The facsimile machine may be configured to send and receive facsimile transmissions according to the T.30 protocol. In alternative embodiments, the facsimile machine may be configured to send and receive facsimile transmissions according to the T.38 protocol.
    Type: Grant
    Filed: February 13, 2009
    Date of Patent: May 13, 2014
    Assignee: Conexant Systems, Inc.
    Inventor: Sverrir Olafsson
  • Patent number: 8723584
    Abstract: A dual-voltage receiver, comprising a voltage detector. A high voltage Schmitt trigger coupled to the voltage detector. A low voltage Schmitt trigger coupled to the voltage detector. A combined level shifter coupled to the high voltage Schmitt trigger and the low voltage Schmitt trigger, wherein the high voltage Schmitt trigger is on and the low voltage Schmitt trigger is off when the voltage detector outputs a high voltage detect signal.
    Type: Grant
    Filed: May 3, 2013
    Date of Patent: May 13, 2014
    Assignee: Conexant Systems, Inc.
    Inventors: Christian Larsen, Mark R. Tennyson
  • Patent number: 8719241
    Abstract: A database system comprising a node value stored in a first electronic data memory device sector. A lock state and access visa associated with the node value, such that if the visa is non-zero, the visa must be presented to access the node. A notification field associated with the node value, the notification field stored in a second electronic data memory device sector. An update processor configured to electronically retrieve and process the notification field if the node value is modified.
    Type: Grant
    Filed: May 31, 2011
    Date of Patent: May 6, 2014
    Assignee: Conexant Systems, Inc.
    Inventors: Carl Mikkelsen, Somasundaram Meiyappan, Aleksander Soltan
  • Publication number: 20140115006
    Abstract: A database system comprising a plurality of access keys stored in a first data memory device sector, each access key associated with a node value stored in a second data memory device sector. An access key processor configured to receive an input value and return the associated node value for the input value if the input value matches an access key stored in the first data memory device sector. The access key processor is configured to generate a revised input value if the input value does not match an access key stored in the first data memory device; a default node value stored in the second data memory device sector and associated with a portion of the input value, wherein the access key processor is configured to return the default node value as part of the revised input value.
    Type: Application
    Filed: December 30, 2013
    Publication date: April 24, 2014
    Applicant: CONEXANT SYSTEMS, INC.
    Inventors: Carl Mikkelsen, Somasundaram Meiyappan
  • Publication number: 20140111274
    Abstract: An integrated circuit comprising a plurality of metal programmable revision identification (MPRI) cells, wherein each MPRI cell further comprises a plurality of metal layers, a plurality of vias and an output.
    Type: Application
    Filed: October 24, 2013
    Publication date: April 24, 2014
    Applicant: Conexant Systems, Inc.
    Inventor: Khosrow Golshan
  • Publication number: 20140091448
    Abstract: There are provided semiconductor packages having corner pins and methods for their fabrication. Such a semiconductor package includes a leadframe and a die paddle, the leadframe having first and second edge sides meeting to form a first corner. The semiconductor package also includes edge pins arrayed substantially parallel to the first edge side and edge pins arrayed substantially parallel to the second edge side. In addition, the semiconductor package includes a first corner pin situated at the first corner, the first corner pin being electrically isolated from the die paddle.
    Type: Application
    Filed: September 27, 2013
    Publication date: April 3, 2014
    Applicant: Conexant Systems, Inc.
    Inventors: Robert W. Warren, Hyun Jane Lee, Nic Rossi
  • Patent number: 8686889
    Abstract: A system for signal processing comprising a cyclic analog to digital converter structure having a first stage and a second stage, wherein the first stage is configured to receive an input signal to perform 1.5 bits/stage ADC and to generate a first stage output signal, and the second stage is configured to receive the first stage output signal and to perform fine offset tuning using a final conversion phase. The second stage further configured to perform 1.5 bits/stage ADC and to generate a second stage output that is fed back to the first stage to iteratively generate a next 1.5 bits, until (N?3) most significant bits of N bits of data are generated. A third stage configured to generate a three least significant bits of the N bits of data using a flash ADC sampling circuit that samples a residue signal at the output of the first stage.
    Type: Grant
    Filed: September 14, 2012
    Date of Patent: April 1, 2014
    Assignee: Conexant Systems, Inc.
    Inventors: Chandrashekar A. Reddy, Yagneshwara Ramakrishna Rao Vadapalli
  • Patent number: 8682002
    Abstract: Audio transducers (headphones, speakers, microphones) inherently do not accurately reproduce the signal presented to them at the input. This can be compensated for by taking into account the transducer characteristics and transforming the input signal using a digital signal processor (DSP) to counteract the inaccuracies. However, for the compensation to take place, the DSP needs to know the characteristics of the transducer. For systems with built-in transducers (like laptops with internal speakers) the characteristics of the internal speakers can be stored on the hard-drive of the laptop and the DSP can read this data and make the appropriate compensations. Because a transducer (headphone, speaker, microphone) has its own characteristics that need to be compensated for separately, a profile is supplied to the DSP either by a database lookup based on an identification made by the user or transducer itself or by profile information stored on the transducer.
    Type: Grant
    Filed: July 1, 2010
    Date of Patent: March 25, 2014
    Assignee: Conexant Systems, Inc.
    Inventors: James Walter Wihardja, Mouna Elkhatib
  • Patent number: 8681399
    Abstract: This disclosure provides systems and methods for decoupling the mechanical drive systems of image scanners from the exposure system. A light source, such as an array of light-emitting diodes (LEDs), may be modulated in order to maintain a constant exposure for each scan-line, regardless of the document velocity. Accordingly, the present systems and methods allow for continuous document scanning at varying speeds. An automatic document feeder may dynamically adjust the velocity of a document without negatively impacting the exposure of the image scan. As the velocity of the document is changed, the modulation rate of the light source may be adjusted to maintain a constant exposure.
    Type: Grant
    Filed: November 8, 2012
    Date of Patent: March 25, 2014
    Assignee: Conexant Systems, Inc.
    Inventor: Raphael Bustin