-
公开(公告)号：FI97261C
公开(公告)日：1996-11-11
申请号：FI902559
申请日：1990-05-23
Applicant: MOTOROLA INC
Inventor： SCHWENT DALE G
-
公开(公告)号：FI97261B
公开(公告)日：1996-07-31
申请号：FI902559
申请日：1990-05-23
Applicant: MOTOROLA INC
Inventor： SCHWENT DALE G
Abstract: An integral phase shifting network (215,216,217) of a transmitter filter (104) provides a means to reduce the size and increase the efficiency of an antenna coupling network. The network to shift the phase of the transmitter filter (104) is printed by depositing conductive material directly on a ceramic block (230) using low-loss circuit elements and can be tuned easily by removing conductive material if required in certain applications. By utilizing an integral phase shifting network (215,216,217), either transmit filter (104) or receive filter (112) having a highly reactive and capacitive out-of-band impedance in the receive or transmit band, respectively, can be connected to a common antenna port without external transmission lines.
-
公开(公告)号：NO175800B
公开(公告)日：1994-08-29
申请号：NO902730
申请日：1990-06-20
Applicant: MOTOROLA INC
Inventor： SCHWENT DALE G
Abstract: An integral phase shifting network (215,216,217) of a transmitter filter (104) provides a means to reduce the size and increase the efficiency of an antenna coupling network. The network to shift the phase of the transmitter filter (104) is printed by depositing conductive material directly on a ceramic block (230) using low-loss circuit elements and can be tuned easily by removing conductive material if required in certain applications. By utilizing an integral phase shifting network (215,216,217), either transmit filter (104) or receive filter (112) having a highly reactive and capacitive out-of-band impedance in the receive or transmit band, respectively, can be connected to a common antenna port without external transmission lines.
-
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
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.
-
Patent Agency Ranking
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
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
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：CA2084990A1
公开(公告)日：1992-11-04
申请号：CA2084990
申请日：1992-04-08
Applicant: MOTOROLA INC
Inventor： RICH RANDALL W , SCHWENT DALE G , OSMANI RASHID M
IPC: C07C29/09 , C07C29/86 , C07C31/20 , C07C31/22 , C07C31/27 , C07C45/50 , C07C45/81 , C07C45/85 , C07C47/02 , H01P1/205 , H01P5/18 , H03G3/20 , H04B1/04 , H04B1/38 , H04B1/40 , H04Q7/38
Abstract: A cellular telephone transmitter (100) includes a variable-gain power amplifier (102), the output of which is filtered and sampled by a filter (104) with an integral directional coupler. Filter (104) includes both a transmitter signal filter and a directional coupler on a ceramic block of one or more pieces. The directional coupler has been realized by two coupled transmission lines provided by the two holes (206 and 207) on the left side of the ceramic block, and the transmitter filter has been realized by five short-circuited coupled transmission lines provided by the five holes (201-205) on the right side of the ceramic block.
-
公开(公告)号：NO902730D0
公开(公告)日：1990-06-20
申请号：NO902730
申请日：1990-06-20
Applicant: MOTOROLA INC
Inventor： SCHWENT DALE G
Abstract: An integral phase shifting network (215,216,217) of a transmitter filter (104) provides a means to reduce the size and increase the efficiency of an antenna coupling network. The network to shift the phase of the transmitter filter (104) is printed by depositing conductive material directly on a ceramic block (230) using low-loss circuit elements and can be tuned easily by removing conductive material if required in certain applications. By utilizing an integral phase shifting network (215,216,217), either transmit filter (104) or receive filter (112) having a highly reactive and capacitive out-of-band impedance in the receive or transmit band, respectively, can be connected to a common antenna port without external transmission lines.
-
公开(公告)号：FI902559A0
公开(公告)日：1990-05-23
申请号：FI902559
申请日：1990-05-23
Applicant: MOTOROLA INC
Inventor： SCHWENT DALE G
Abstract: An integral phase shifting network (215,216,217) of a transmitter filter (104) provides a means to reduce the size and increase the efficiency of an antenna coupling network. The network to shift the phase of the transmitter filter (104) is printed by depositing conductive material directly on a ceramic block (230) using low-loss circuit elements and can be tuned easily by removing conductive material if required in certain applications. By utilizing an integral phase shifting network (215,216,217), either transmit filter (104) or receive filter (112) having a highly reactive and capacitive out-of-band impedance in the receive or transmit band, respectively, can be connected to a common antenna port without external transmission lines.
-
-
-
-
-
-
-
-
Search Results
39
records
(took 0.026 seconds)
