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    Speech-noise discriminating constant pulse width squelch
    1.
    发明授权
    Speech-noise discriminating constant pulse width squelch 失效
    语音噪声识别恒定脉冲宽度SQUELCH

    公开(公告)号：US3603884A

    公开(公告)日：1971-09-07

    申请号：US3603884D

    申请日：1969-06-04

    Applicant: MOTOROLA INC

    Inventor： ZAURA PAUL J JR ,  HAWKINS GEORGE C ,  CANNALTE GARY A

    IPC: H03G3/34 ,  H04B1/10

    CPC classification number: H03G3/342

    Abstract: A squelch circuit for a receiver wherein the detected signals at the discriminator are amplified and converted to pulses of constant period or width. The pulses are detected and used to develop a control voltage to actuate an audio or transmitter switch. A decrease in the noise signal due to the presence of a proper radio frequency signal will decrease the pulse rate, increase the control voltage and actuate the switches allowing the audio signal to pass through the audio stages of the receiver and activating an associated transmitter.

    PORTABLE TELEPHONE ID CODE TRANSFER SYSTEM
    2.
    发明专利
    PORTABLE TELEPHONE ID CODE TRANSFER SYSTEM 未知

    公开(公告)号：CA1223990A

    公开(公告)日：1987-07-07

    申请号：CA469247

    申请日：1984-12-04

    Applicant: MOTOROLA INC

    Inventor： HAWKINS GEORGE C

    IPC: H04M1/673 ,  G08B5/22 ,  H04B7/26 ,  H04L9/32 ,  H04M1/00 ,  H04M1/66 ,  H04M1/727 ,  H04Q7/20 ,  H04Q7/38 ,  H04Q7/04

    Abstract: PORTABLE TELEPHONE ID CODE TRANSFER SYSTEM A wireless telephone communication system 10 is provided in which a portable unit 12 communicates with a base unit 11 over a wireless (radio) communication link 15. Access to a telephone network 15b by the portable unit 12, via the base unit 11, is permitted when the base and portable units have corresponding ID codes stored therein. The base ID code is hard wired into the base unit 11, and the portable unit 12 learns its ID code from the base unit in response to mechanically coupling the base and portable units together via plug and socket assemblies 28 and 45. The base and portable units each have associated microprocessors 22 and 40 which implement the transfer of an ID code to the portable unit from the base unit via conductors (24'-42') which are part of the plug and socket assemblies. The plug and socket assemblies, when mated also provide a connection between a battery charging supply circuit 25 in the base and a battery 46 in the portable. Reset circuits 29 and 50 are provided in the base and portable units and control the resetting of the microprocessors 22 and 40.

    PORTABLE TELEPHONE ID CODE TRANSFER SYSTEM.
    10.
    发明公开
    PORTABLE TELEPHONE ID CODE TRANSFER SYSTEM. 失效
    与传送识别码的便携电话系统。

    公开(公告)号：EP0165294A4

    公开(公告)日：1988-05-26

    申请号：EP85900311

    申请日：1984-11-19

    Applicant: MOTOROLA INC

    Inventor： HAWKINS GEORGE C

    IPC: H04M1/673 ,  G08B5/22 ,  H04B7/26 ,  H04L9/32 ,  H04M1/00 ,  H04M1/66 ,  H04M1/727 ,  H04Q7/20 ,  H04Q7/38

    CPC classification number: H04M1/727

    Abstract: A wireless telephone communication system (10) in which a portable unit (12) communicates with a base unit (11) over a wireless (radio) communication link (15). Access to a telephone network (15b) by the portable unit (12), via the base unit (11), is permitted when the base and portable units have corresponding ID codes stored therein. The base ID code is hardwired into the base unit (11), and the portable unit (12) learns its ID code from the base unit in response to mechanically coupling the base and portable units together via plug (28) and socket (45) assemblies. The base and portable units each have associated microprocessors (22 and 40) which implement the transfer of an ID code to the portable unit from the base unit via conductors (24'-42') which are part of the plug and socket assemblies. The plug and socket assemblies, when mated, also provide a connection between a battery charging supply circuit (25) in the base unit (11) and a battery (46) in the portable unit (12). Reset circuits (29 and 50) are provided in the base and portable units and control the resetting of the microprocessors (22 and 40).

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