公开(公告)号：GB2302232B

公开(公告)日：1999-06-30

申请号：GB9611237

申请日：1996-05-30

Applicant: MOTOROLA INC

Inventor： GAYNES STEPHEN JOHN ,  DOMOLECZNY JAMES D ,  NAGELE ALBERT LEO ,  WEISSHAPPEL ROBERT N ,  BRUNETTE JAMES ROBERT ,  SCOTT DAVID BEUTLER ,  CRISTIANO GARY M

IPC: H04B1/38 ,  H01M2/10 ,  H01M2/30 ,  H04M1/02 ,  H04Q7/32 ,  H04M1/72

Abstract: 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.

公开(公告)号：GB2270434A

公开(公告)日：1994-03-09

申请号：GB9321474

申请日：1993-01-11

Applicant: MOTOROLA INC

Inventor： SCHWENT DALE G ,  OSMANI RASHID M ,  CRISTIANO GARY M

IPC: H03G3/10 ,  H03F3/04 ,  H03G3/00 ,  H03G3/20 ,  H03G3/30 ,  H03F3/24

Abstract: 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.

公开(公告)号：GB2270434B

公开(公告)日：1995-12-06

申请号：GB9321474

申请日：1993-01-11

Applicant: MOTOROLA INC

Inventor： SCHWENT DALE GERALD ,  OSMANI RASHID MASHID ,  CRISTIANO GARY M

IPC: H03G3/10 ,  H03F3/04 ,  H03G3/00 ,  H03G3/20 ,  H03G3/30 ,  H03F3/24

Abstract: 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.

公开(公告)号：GB2245789A

公开(公告)日：1992-01-08

申请号：GB9112389

申请日：1991-06-10

Applicant: MOTOROLA INC

Inventor： SCHWENT DALE G ,  OSMANI RASHID M ,  CRISTIANO GARY M

IPC: H03F3/72 ,  H04B1/04

Abstract: 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.

公开(公告)号：CA2043413C

公开(公告)日：1994-05-10

申请号：CA2043413

申请日：1991-05-28

Applicant: MOTOROLA INC

Inventor： SCHWENT DALE G ,  OSMANI RASHID M ,  CRISTIANO GARY M

IPC: H03F3/72 ,  H04B1/04 ,  H03G7/06 ,  H03F3/19

Abstract: DUAL MODE POWER AMPLIFIER FOR RADIOTELEPHONE A dual mode power amplifier operable in either 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.

公开(公告)号：CA2109410A1

公开(公告)日：1993-09-14

申请号：CA2109410

申请日：1993-01-11

Applicant: MOTOROLA INC

Inventor： SCHWENT DALE G ,  OSMANI RASHID M ,  CRISTIANO GARY M

IPC: H03G3/10 ,  H03F3/04 ,  H03G3/00 ,  H03G3/20 ,  H03G3/30

Abstract: 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.

公开(公告)号：MX9301367A

公开(公告)日：1993-09-01

申请号：MX9301367

申请日：1993-03-12

Applicant: MOTOROLA INC

Inventor： SCHWENT DALE G ,  OSMANI RASHID M ,  CRISTIANO GARY M

IPC: H03F3/04 ,  H03G3/10 ,  H03G3/00 ,  H03G3/20 ,  H03G3/30 ,  H02G7/00

Abstract: 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.

公开(公告)号：CA2109410C

公开(公告)日：1997-12-09

申请号：CA2109410

申请日：1993-01-11

Applicant: MOTOROLA INC

Inventor： OSMANI RASHID M ,  CRISTIANO GARY M ,  SCHWENT DALE G

IPC: H03G3/10 ,  H03F3/04 ,  H03G3/00 ,  H03G3/20 ,  H03G3/30 ,  H03F3/34

Abstract: 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 mod e 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 an d the voltage convertor (104) supply voltage is allowed through to the collectors of the power amplifiers (101-103). This permit s the power amplifiers (101-103) to operate with optimum linearity in a digital transmission environment. In an analog environme nt, the voltage convertor (104) is on and supplying a reduced voltage to the power amplifiers (101-103) allowing more effi cient operation in this mode.

公开(公告)号：GB2245789B

公开(公告)日：1995-03-01

申请号：GB9112389

申请日：1991-06-10

Applicant: MOTOROLA INC

Inventor： SCHWENT DALE G ,  OSMANI RASHID M ,  CRISTIANO GARY M

IPC: H03F3/72 ,  H04B1/04 ,  H03F3/24

Abstract: 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.

公开(公告)号：CA1210071A

公开(公告)日：1986-08-19

申请号：CA462541

申请日：1984-09-06

Applicant: MOTOROLA INC

Inventor： WALCZAK THOMAS J ,  STONE RICHARD M ,  CRISTIANO GARY M

IPC: H04B1/04

Abstract: 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.