Motorola Corporation

Gary Michael Cristiano

Albert L Nagele

Stephen John Gaynes

James Dennis Domoleczny, Sr

Dale Gerard Schwent

Scott David Beutler

Rashid M Osmani

James Robert Brunette

Robert N Weisshappel

Leonid Soren

Brian Jon Hassemer

Thomas J Walczak

Richard M Stone

Albert Leo Nagele

James Dennis Domoleczny

A novel portable electronic device including a first housing portion (106) having a first battery (135) integrally associated with the first housing portion and a second housing portion (104) having a second battery (102) operatively coupled to an external surface of the second housing portion. Also, a method for coupling power to a portable electronic device comprises steps of providing a recessed region in a first housing portion for receiving a first battery and operatively coupling a second battery to an external surface of a second housing portion.

Portable electronic device and method of coupling power thereto

Housing for a portable telephone

A novel portable electronic device comprising a first housing portion (106) having a first battery (135) integrally associated with said first housing portion and a second housing portion (104) having a second battery (102) operatively coupled to an external surface of the second housing portion. Also, a method for coupling power to a portable electronic device comprises steps of providing a recessed region in a first housing portion for receiving a first battery and operatively coupling a second battery to an external surface of a second housing portion.

Portable electronic device and method for coupling power thereto

The dual mode power amplifier apparatus of the present invention is comprised of a number of power amplifiers (101-103) coupled to a voltage convertor (104) through their collector supply lines. A mode select line (105) is connected to the voltage convertor (104) to select a digital or analog mode. The preferred embodiment of the present invention is used in a hybrid digital/analog radiotelephone. In the digital mode, the voltage convertor (104) is turned off and the voltage convertor (104) supply voltage is allowed through to the collectors of the power amplifiers (101-103). This permits the power amplifiers (101-103) to operate with optimum linearity in a digital transmission environment. In an analog environment, the voltage convertor (104) is on and supplying a reduced voltage to the power amplifiers (101-103) allowing more efficient operation in this mode.

High efficiency dual mode power amplifier apparatus

A dual mode power amplifier operable in etiher the linear mode or the saturation mode. The power amplifier, when comprising a portion of a radio transmitter, permits efficient amplification of either a frequency modulated or a composite modulated signal by operation of the amplifier in the saturation mode or the linear mode, respectively. A processor determines the modulation-type of the signal and generates a signal to cause operation of the amplifier in either the saturation mode or the linear mode.

Dual mode power amplifier for radiotelephone

Improved temperature compensated, automatic output control (AOC) circuitry for RF signal power amplifiers is described that maintains the output power within one-half dB of a selected one of eight power levels varying from nine milliwatts to five watts, a dynamic range of twenty-eight dB. The amplification of the RF signal amplifier is proportional to a drive current signal provided by a current amplifier. A half-wave rectifier is coupled to the output of final amplifiers for generating an output power signal that has a magnitude proportional to the output power. The half-wave rectifier is temperature compensated for and biased by a diode coupled to the rectifier by one resistor and coupled to supply voltage by another resistor. The output power voltage is further coupled to an amplifier having an amplification factor selected by level control signals. The amplified output power signal is coupled to a comparator which varies the drive current provided by the current amplifier in response to the voltage difference between the amplified output power signal and a reference voltage.

Temperature compensated automatic output control circuitry for RF signal

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Hoffman Estates, IL, United States of America

Gary Michael Cristiano