Motorola Corporation

Intel Corporation

Freescale Semiconductor,inc.

Motorola Mobility LLC

David J Graham

Dane E Blackburn

Raul Salvi

Keith Andrew Tilley

Charles R Ruelke

Mark Rozental

Daniel J Declerck

Chin Pan Wong

David H Minasi

Moshe Ben-Ayun

Patrick Joseph Doran

Enrique Ferrer

Richard B Nicholls

Kenneth A Hansen

Richard B Meador

Jorge Ivonnet

Daniel E Brueske

Mohammed Alam

William Reinisch

Martin Thuo Karanja

Ronald H Deck

John J Parkes, Jr

Atif A Meraj

William P Alberth

James Gregory Mittel

Brian Shelton

Hasham Khushk

An apparatus of user equipment (UE) includes a radio integrated circuit (IC), an adjustable external low noise amplifier (eLNA) external to the radio IC, and processing circuitry. The radio IC includes a receive signal circuit path including an adjustable gain internal low noise amplifier (iLNA), and a transmit signal circuit path including a digital-to-analog converter (DAC) circuit configured to convert digital signals to analog baseband signals for transmitting. The processing circuitry is configured to provide digital values of the digital signals to the DAC circuit and initiate adjusting gain of one or both of the iLNA and the eLNA according to the digital values.

Detecting high TX leakage to improve linearity

A method of operating a communication device to facilitate a user to control multiple concurrent communication sessions. In operation, the communication device receives a plurality of incoming communications from a plurality of recipients, in which each recipient corresponds to at least one of the multiple concurrent communication sessions. The communication device further detects a user response from a user interface of the communication device in response to receiving the incoming communications. Next, the communication device correlates the user response with at least one of the received incoming communications or previously received communications corresponding to the recipients. Further, the communication device selects at least one of the plurality of recipients based on the correlation and sends the user response to the selected at least one of the plurality of recipients.

Method for facilitating user of a communication device to control multiple concurrent communication sessions

An automatic gain control (AGC) method and circuit () within a receiver uses a digital state machine () to implement the AGC function. independent from interaction with a host processor () and for multiple modulation protocols without duplicating circuitry. Modulation protocol and parameters for any of various gain responses are stored in a register (). Multiple states, each corresponding to a predetermined range of RF input signal strength, are stored in the register. Each state contains parameters that determine a gain control signal for controlling a variable gain amplifier (). The states are independent and may be selectively disabled to create asymmetric responses. Within any state, an adaptable number of iterations may be set to implement a different update rate or step size after a predetermined number of closed loop gain change iterations has not resulted in a transition to a state that represents a desired output gain.

Receiver with automatic gain control that operates with multiple protocols and method thereof

A frequency generation circuit includes an oscillator ( ), a comparator ( ) coupled to the oscillator, a first divider ( ) coupled to the comparator, a PLL ( ) coupled to the first divider, a second divider ( ) coupled to the PLL, a first multiplexor ( ) coupled to the second divider, a third divider ( ) coupled to the comparator and the first multiplexor, a second multiplexor ( ) coupled to the comparator and the reference clock PLL, a fourth divider ( ) coupled to the second multiplexor, a fifth divider ( ) coupled to the comparator, and a seventh divider ( ) coupled to the comparator. A method of operating a transceiver includes using the frequency generation circuit to provide a first clock signal, a second clock signal, a first reference frequency, and a second reference frequency for a first component, a second component, a third component, and a fourth component, respectively, of the transceiver.

Frequency generation circuit and method of operating a tranceiver

A multimode fast attack automatic gain control (AGC) circuit (,) includes an analog feedback loop and a digital feedback loop. The analog feedback loop is switched into the amplifier stage (,) by a first switch (,) when dynamic control of the gain attenuation is desired. The digital feedback loop is switched into the amplifier stage when attenuation is to be adjusted periodically, such as between sequentially received time slots in a time division multiple access (TDMA) mode of communication.

Multimode fast attack automatic gain control (AGC) loop for narrow band receivers

A gain controllable low noise amplifier (LNA) (,) with automatic linearity enhancement utilizes an amplifier stage (,) for amplifying a radio frequency (RF) input signal and a dynamically controllable feedback loop amplifier stage (,) for providing negative feedback to the feedback amplifier. A bias controller (,) is coupled to the dynamically controllable feedback loop amplifier stage (,) for monitoring a receiver automatic gain control (AGC) system (,) and providing a dynamic bias to the feedback loop amplifier stage (,) to improve linearity to the LNA in the presence of strong on-channel and off-channel signal conditions.

Gain controllable low noise amplifier with automatic linearity enhancement and method of doing same

A DC offset correction loop (,) utilizes a sign bit generator (,), binary search stage (,), and a digital-to-analog converter (,) in its feedback path to correct for DC offsets at the input of a gain stage (,). When a correction value is obtained, it is applied and held (,) to compensate for the DC offset. When a programming event occurs (,), such as detecting an increase in DC offset beyond a threshold, detecting a significant temperature change, or passage of time, a new DC offset correction cycle is initiated.

Method and apparatus for settling and maintaining a DC offset

A digital signal processor (100) receives a digitally vocoded signal (102), and calculates a staggered average value (404) from the frame energy of each received frame, or the product of the frame energy and a voicing value. While the staggered average value is above a threshold voice indicator value, speech is declared present.

Method for detecting speech in a vocoded signal

A fast attack Automatic Gain Control (AGC) loop (100) having a first feedback loop with selectable responses shapes and a second feedback loop with selectable responses shapes. Response shape selection is based, in part, upon fast pull-down, overshoot recovery, and normal mode loop operation.

Fast attack automatic gain control (AGC) loop for narrow band receivers

A method for acquiring rapid automatic gain control (AGC) response in a narrow band receiver teaches opening the AGC loop (100), setting the gain control signal (106) amplitude of the AGC amplifier stage (104) to a known value, altering the gain control signal (106) amplitude over time, and monitoring the narrow band receiver for an output signal (112). Upon output signal (112) detection, halting alteration of the gain control signal (106) amplitude, closing the AGC loop (100) and commencing normal operation. A particular facet of this approach suggests detecting the output (112) with a varying gain detector (116,132) after the loop (100) is closed and before normal operations are commenced.

Method for acquiring a rapid automatic gain control (AGC) response in a

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Gilbert, AZ, United States of America

David J Graham