公开(公告)号：GB2356095A

公开(公告)日：2001-05-09

申请号：GB0017433

申请日：2000-07-14

Applicant: MOTOROLA INC

Inventor： ALBERTH WILLIAM P ,  KLOMSDORF ARMIN WERNER ,  WINKELMANN LUKE EDWARD

IPC: H03G11/08 ,  H03F1/02 ,  H03F1/56

Abstract: A transmitter amplifying arrangement for linear modulation schemes is described, in which the signal in the power amplifier 118 is amplified as a constant envelope signal, so that efficient amplification may be used, eg class C. An impedance network 120 following the amplifier is then controlled to produce the desired amplitude modulation. A pre-distortion arrangement is also described.

公开(公告)号：GB2356093A

公开(公告)日：2001-05-09

申请号：GB0017401

申请日：2000-07-14

Applicant: MOTOROLA INC

Inventor： ALBERTH WILLIAM P ,  KLOMSDORF ARMIN WERNER ,  WINKELMANN LUKE EDWARD

IPC: H03G11/04 ,  H03F1/02 ,  H03F1/56

Abstract: An envelope following amplifier arrangement for a transmitter is described, in which an impedance network 120 connected to the output of the power amplifier 118 is controlled to follow the envelope and so improve the efficiency. A pre-distortion arrangement is also described.

公开(公告)号：DE10035060A1

公开(公告)日：2001-04-12

申请号：DE10035060

申请日：2000-07-17

Applicant: MOTOROLA INC

Inventor： KLOMSDORF ARMIN ,  ALBERTH WILLIAM P ,  WINKELMANN LUKE

IPC: H03F3/24 ,  H03F1/02 ,  H03F1/32 ,  H03F3/20 ,  H03G3/20 ,  H04B1/04 ,  H03F3/21 ,  H03G3/30

Abstract: A power amplifying circuit with load adjust for control of adjacent and alternate channel power. A power amplifier amplifies an input signal to produce an amplified signal. A variable impedance network presents different impedances to the output of the power amplifier responsive to a load control signal. A peak-to-average detector provides an indication of a peak-to-average ratio of the amplified signal. A controller coupled to the peak-to-average detector and the variable impedance network produces the load control signal responsive to the indication of the peak-to-average ratio.

公开(公告)号：GB2352897A

公开(公告)日：2001-02-07

申请号：GB0017436

申请日：2000-07-14

Applicant: MOTOROLA INC

Inventor： KLOMSDORF ARMIN WERNER ,  ALBERTH WILLIAM P ,  WINKELMANN LUKE EDWARD

IPC: H03F1/02 ,  H03F1/32 ,  H03F3/24 ,  H03F3/20 ,  H03G3/20 ,  H04B1/04

Abstract: A power amplifying circuit (300) with load adjust for control of adjacent and alternate channel power. A power amplifier (172) amplifies an input signal to produce an amplified signal. A variable impedance network (174) presents different impedances to the output of the power amplifier (172) responsive to a load control signal. A detector (180) provides an indication of a peak-to-average or difference ratio of the amplified signal. A controller (184) coupled to the detector (180) and the variable impedance network (174) produces the load control signal responsive to the indication of the peak-to-average ratio or difference.

公开(公告)号：DE19857540A1

公开(公告)日：1999-07-15

申请号：DE19857540

申请日：1998-12-14

Applicant: MOTOROLA INC

Inventor： RABE DUANE ,  ALBERTH WILLIAM P ,  VANNATTA LOUIS J

IPC: H04B1/40 ,  H02J9/00 ,  H02J9/06 ,  H04B1/04 ,  H04B1/16

公开(公告)号：PL326648A1

公开(公告)日：1998-12-07

申请号：PL32664898

申请日：1998-06-03

Applicant: MOTOROLA INC

Inventor： JAHAGIRDAR KETAN R ,  ALBERTH WILLIAM P ,  HACKBART ROLLAND R ,  OSMANI RASHID M ,  CAHILL STEPHEN V

IPC: H04M1/00 ,  H04M1/02 ,  H04B1/38 ,  H04M1/22 ,  H04M1/57 ,  H04M1/663 ,  H04M1/725 ,  H04M1/73 ,  H04M11/00 ,  H04W52/02 ,  H04Q7/22

Abstract: A portable communication device (102) includes a housing (105), a first display area (130), and a second display area (132). The first display area (130) is disposed in and outwardly directed from a front (120) of the housing (105), and the second display area (132) is disposed in and outwardly directed from a side (122) of the housing (105). The housing (105) may include a housing portion (114) movable to an open position and a closed position, where the second display area (132) is covered by the housing portion (114) when positioned in one of the first and the second positions.

公开(公告)号：FI981264A

公开(公告)日：1998-12-06

申请号：FI981264

申请日：1998-06-03

Applicant: MOTOROLA INC

Inventor： JAHAGIRDAR KETAN R ,  ALBERTH WILLIAM P ,  HACKBART ROLLAND R ,  OSMANI RASHID M ,  CAHILL STEPHEN V

IPC: H04B1/38 ,  H04M1/00 ,  H04M1/02 ,  H04M1/22 ,  H04M1/57 ,  H04M1/663 ,  H04M1/725 ,  H04M1/73 ,  H04M11/00 ,  H04W52/02 ,  H04M

Abstract: A portable communication device (102) includes a housing (105), a first display area (130), and a second display area (132). The first display area (130) is disposed in and outwardly directed from a front (120) of the housing (105), and the second display area (132) is disposed in and outwardly directed from a side (122) of the housing (105). The housing (105) may include a housing portion (114) movable to an open position and a closed position, where the second display area (132) is covered by the housing portion (114) when positioned in one of the first and the second positions.