Motorola Corporation

Matt Hayek

Greg R Black

Deven M Patel

John F Robin

Lazaar J Louis

Methods in intermediate frequency and direct conversion receivers for reducing pre-selection filter leakage and harmonic coupling to a programmable voltage controlled oscillator by mixing a receive signal at a mixer having a mixer injection frequency outside a pre-selection filter passband. In some applications, the mixer injection frequency is conditionally moved outside the pre-selection filter passband. In other applications, signal gain is increased to compensate for any loss resulting from shifting the mixer injection frequency outside the pre-selection passband.

RF receivers and methods therefor

A wireless transmitter () including an amplifier (), an automatic output controller () (AOC) having an output coupled to a control signal input. The AOC detects a second amplifier parameter that changes with a change in load impedance during a transmission, and the AOC reduces a change in transmitter output power related to the change in load impedance based on a first parameter and the detected second parameter during the same transmission during which the second parameter was detected.

Wireless transmitter having polar loop controller with current feedback and methods

A method () and apparatus () generate an input signal based on the orientation of a device. A sensor () such as a camera, a gyro, or an accelerometer detects a change in device orientation and generates a position input signal that is provided to an application program () such as a game program, a text messaging program, or a user interface program to affect an operation thereof. The input signal can, for example, affects a navigation position associated with the application program.

Device orientation based input signal generation

A method of operating an amplifier, for example, in a wireless radio transceiver, including monitoring a characteristic of the amplifier during an operating interval of the amplifier, for example, during a transmission burst, providing an open-loop control signal to the amplifier during a subsequent operating interval of the amplifier wherein the open-loop control signal based on the characteristic monitored during a previous operating interval. In one embodiment, the corrected control signals are stored in a look-up table () that is updated based on the changes in load impedance.

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Libertyville, IL, United States of America

Matt Hayek