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    Method and apparatus for coupling signals
    11.
    发明专利
    Method and apparatus for coupling signals 未知

    公开(公告)号：GB2305027A

    公开(公告)日：1997-03-26

    申请号：GB9618700

    申请日：1996-09-06

    Applicant: MOTOROLA INC

    Inventor： BEUTLER SCOTT DAVID ,  CRUZ MICHAEL STEVEN ,  SKUTTA FRANK ROBERT

    IPC: H01Q1/24 ,  H01R12/50 ,  H01R13/648 ,  H01R24/40 ,  H04M1/02 ,  H04M1/215 ,  H01R23/68 ,  H01R13/658

    Abstract: A unique method and apparatus for coupling radio frequency signals from a wireless communication device to an external device by way of an I/O port (116). In particular, a connector having three adjacent conductive elements (238) couples signals to an external device wherein the first and third conductive elements (239, 241) are electrically coupled to a ground plane and wherein the second conductive element (240) is electrically coupled to a conductive path. The connector is substantially covered with a shield (230) coupled to the ground plane. A mating connector also includes a shield which is commonly grounded. The mating connector preferably includes an internally located coaxial connector and cable to minimize loss of RF communication signals. Component of the connectors (116) are selectively grounded to eliminate RF interference and establish a reliable RF ground reference to a pc board of the wireless communication device and the coaxial connector.

    Method and apparatus for coupling signals
    12.
    发明专利
    Method and apparatus for coupling signals 未知

    公开(公告)号：AU6217496A

    公开(公告)日：1997-03-13

    申请号：AU6217496

    申请日：1996-08-21

    Applicant: MOTOROLA INC

    Inventor： BEUTLER SCOTT DAVID ,  CRUZ MICHAEL STEVEN ,  SKUTTA FRANK ROBERT

    IPC: H01Q1/24 ,  H01R12/50 ,  H01R13/648 ,  H01R24/40 ,  H04M1/02 ,  H04M1/215 ,  H04B1/40 ,  H04B1/18 ,  H04B7/26 ,  H04Q7/32

    Abstract: A unique apparatus for coupling radio frequency (RF) signals from a wireless communication device (200) to an external device by way of an I/O port (116). In particular, a connector having three adjacent contact elements (238) couples signals to an external device wherein the first and third contact elements (239, 241) are electrically coupled to a ground plane (302) and wherein the second or middle contact element (240) is electrically coupled to a conductive RF signal path (344). The ground plane and the conductive path (334) are preferably on a printed circuit (pc) board which is preferably a three layer board with the conductive path (334) located between two ground planes (302, 352). The connector is substantially covered with a shield (230) coupled by legs (248) to the ground plane (302) at apertures (332). A mating connector (400) also includes a shield (430) which is commonly grounded. The mating connector preferably includes an internally located coaxial connector (412) and cable (414) to minimize loss of RF communication signals. Components of the connectors (116, 400) are selectively grounded to eliminate RF interference and establish a reliable RF ground reference to a pc board (300) of the wireless communication device and the coaxial connector. The connectors also include latching members (405) and apertures (250) for firm coupling therebetween.

    Method and Apparatus for Coupling Signals
    13.
    发明专利
    Method and Apparatus for Coupling Signals 未知

    公开(公告)号：CA2183716A1

    公开(公告)日：1997-03-09

    申请号：CA2183716

    申请日：1996-08-20

    Applicant: MOTOROLA INC

    Inventor： BEUTLER SCOTT DAVID ,  CRUZ MICHAEL STEVEN ,  SKUTTA FRANK ROBERT

    IPC: H01Q1/24 ,  H01R12/50 ,  H01R13/648 ,  H01R24/40 ,  H04M1/02 ,  H04M1/215 ,  H04Q7/32 ,  H01R13/658

    Abstract: A unique method and apparatus for coupling radio frequency signals from a wireless communication device (200) to an external device by way of an I/O port (116). In particular, a connector having three adjacent conductive elements (238) couples signals to an external device wherein the first and third conductive elements (239, 241) are electrically coupled to a ground plane (302) and wherein the second conductive element (240) is electrically coupled to a conductive path (344). The connector is substantially covered with a shield (230) coupled to the ground plane. A mating connector (400) also includes a shield (430) which is commonly grounded. The mating connector preferably includes an internally located coaxial connector (412) and cable (414) to minimize loss of RF communication signals. Component of the connectors (116, 400) are selectively grounded to eliminate RF interference and establish a reliable RF ground reference to a pc board of the wireless communication device and the coaxial connector.

    AUTOMATIC GAIN CONTROL MEANS FOR A SINGLE SIDEBAND RADIO RECEIVER
    15.
    发明专利
    AUTOMATIC GAIN CONTROL MEANS FOR A SINGLE SIDEBAND RADIO RECEIVER 未知

    公开(公告)号：HK50283A

    公开(公告)日：1983-11-11

    申请号：HK50283

    申请日：1983-11-03

    Applicant: MOTOROLA INC

    Inventor： SKUTTA FRANK ROBERT

    IPC: H03G3/20 ,  H03G3/30 ,  H04B1/30

    Abstract: 1533719 Automatic gain control MOTOROLA Inc 10 Aug 1976 [22 Oct 1975] 33293/76 Heading H3T An automatic gain control (A.G.C.) signal from the audio stage of a single side band radio receiver is slow acting when the audio signal is low but fast acting when the audio signal is above a predetermined level. As described, the ouput from the audio preamplifier is applied through a clipper circuit 40, 41 to a transistor 43 which amplifies the peaks. Negative peaks are removed by diode 54 and positive peaks are passed by transistor 61 to charge a capacitor 90, the voltage on which is the A.G.C. signal. When the output from the audio preamplifier exceeds about 2À2 volts, the clipped peaks are sufficient to turn on transistor 45 and capacitor 90 is charged rapidly through resistors 102, 103 in parallel. Capacitor 90 has a slow discharge path through resistors 91 and 92, but if the audio signal ceases, transistors 61 and 65 turn off and after a 0À8 sec. delay due to capacitor 82, transistor 70 turns on to discharge capacitor 90 rapidly. The delay prevents discharge in response to inter-syllable gaps in speech. The A.G.C. voltage on capacitor 90 is applied through germanium diode 110 and resistor 111 to control a fieldeffect transistor r.f. attenuator. When the A.G.C. voltage reaches a value corresponding to near the end of the attenuator range of control, transistor 93 turns on applying the A.G.C. signal through germanium diode 97 and resistor 96 to control the gain of the i.f. amplifier. At the same time, transistor 101 is turned off to remove resistor 102 from 11 connection with 103 to reduce the fast charging rate of capacitor 90.

    17.
    发明专利
    未知

    公开(公告)号：FR2759827B1

    公开(公告)日：2001-05-25

    申请号：FR9801198

    申请日：1998-02-03

    Applicant: MOTOROLA INC

    Inventor： VLAHOS CONSTANTINIE ,  PECKHAM DAVID S ,  SKUTTA FRANK ROBERT

    IPC: H04B1/40 ,  H03D7/12 ,  H03J1/00 ,  H04B1/26 ,  H04B1/44 ,  H04B1/16

    Abstract: A method and apparatus enables a communication device (100) to operate in multiple bands, such as GSM 900 MHz, DCS 1800 MHz, and DCS 1900 MHz bands, by eliminating the need for a mixer for each band. In a dual band GSM/DCS 1800 radiotelephone, for example, the local oscillator (LO) injection frequencies for both GSM and DCS bands are provided to a mixer (234) through the use of combination filters (222, 246). Thus, the duplexing and matching requirements to the mixer input are simplified and the signal losses are minimized. The common output ports of the GSM RX/LO combination filter and DCS RX/LO combination filter are duplexed to the input of the mixer. Also, the input impedance matching of the mixer is designed to match the impedance for the received signals in each band, as well as provide an RF trap at the IF frequency. The match at the output of the mixer is designed to match the impedance of the IF filter and provides a low impedance to RF input frequencies. Finally, a tri-band radiotelephone is also described.

    Method and apparatus for coupling signals
    18.
    发明专利
    Method and apparatus for coupling signals 未知

    公开(公告)号：GB2305027B

    公开(公告)日：2000-01-19

    申请号：GB9618700

    申请日：1996-09-06

    Applicant: MOTOROLA INC

    Inventor： BEUTLER SCOTT DAVID ,  CRUZ MICHAEL STEVEN ,  SKUTTA FRANK ROBERT

    IPC: H01Q1/24 ,  H01R12/50 ,  H01R13/648 ,  H01R24/40 ,  H04M1/02 ,  H04M1/215 ,  H01R12/16 ,  H01R13/658

    Abstract: A unique apparatus for coupling radio frequency (RF) signals from a wireless communication device (200) to an external device by way of an I/O port (116). In particular, a connector having three adjacent contact elements (238) couples signals to an external device wherein the first and third contact elements (239, 241) are electrically coupled to a ground plane (302) and wherein the second or middle contact element (240) is electrically coupled to a conductive RF signal path (344). The ground plane and the conductive path (334) are preferably on a printed circuit (pc) board which is preferably a three layer board with the conductive path (334) located between two ground planes (302, 352). The connector is substantially covered with a shield (230) coupled by legs (248) to the ground plane (302) at apertures (332). A mating connector (400) also includes a shield (430) which is commonly grounded. The mating connector preferably includes an internally located coaxial connector (412) and cable (414) to minimize loss of RF communication signals. Components of the connectors (116, 400) are selectively grounded to eliminate RF interference and establish a reliable RF ground reference to a pc board (300) of the wireless communication device and the coaxial connector. The connectors also include latching members (405) and apertures (250) for firm coupling therebetween.

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