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    51.
    发明专利
    未知

    公开(公告)号：AT432578T

    公开(公告)日：2009-06-15

    申请号：AT04719464

    申请日：2004-03-11

    Applicant: MOTOROLA INC

    Inventor： BEN-AYUN MOSHE ,  NOCHAM GABRIELA ,  ROZENTAL MARK

    IPC: H04L27/36 ,  H03F1/32 ,  H03F1/34 ,  H04L27/00

    Abstract: A wireless communication unit ( 300 ) comprises a linearised transmitter ( 325 ) having a forward path, a power amplifier ( 324 ) and a feedback loop, operably coupled to the power amplifier ( 324 ) and the forward path. The feedback loop comprises a loop adjustment function ( 442 ), and the forward path and feedback loop comprise quadrature circuits. A processor ( 322 ) applies a first training signal to a first quadrature circuit loop for routing through the forward path, power amplifier and feedback path to determine at least one first parameter setting of the loop adjustment function ( 442 ). The processor ( 322 ) also applies a second training signal to a second quadrature circuit loop to determine at least a second parameter setting of the loop adjustment function ( 442 ).

    Reduction of interference during phase training in a Cartesian transmitter
    53.
    发明专利
    Reduction of interference during phase training in a Cartesian transmitter 未知

    公开(公告)号：GB2445776A

    公开(公告)日：2008-07-23

    申请号：GB0700866

    申请日：2007-01-17

    Applicant: MOTOROLA INC

    Inventor： BEN-AYUN MOSHE ,  GROSSMAN OVADIA ,  ROZENTAL MARK

    IPC: H03F1/32 ,  H03F1/34 ,  H04L27/36

    Abstract: A linearised transmitter 400 has a power amplifier 412, a forward path and a feedback path for feeding back a portion of the output signal. During loop phase training, a processor opens the feedback switches 424 and 426, applies phase training signals to the inputs 402,430, and switches low pass filters 490,492 into the feedback path. The filters remove wideband noise that may be introduced by an interfering nearby transmitter and so improve the precision of loop phase adjustment applied to the phase shifter 442. A linearised transmitter integrated circuit is described. The transmitter may be used in TETRA equipment, mobile phones, or private mobile radios.

    A multiple wire antenna element arrangement for a communication terminal
    56.
    发明专利
    A multiple wire antenna element arrangement for a communication terminal 未知

    公开(公告)号：GB2437115A

    公开(公告)日：2007-10-17

    申请号：GB0607481

    申请日：2006-04-13

    Applicant: MOTOROLA INC

    Inventor： GROSSMAN OVADIA ,  BEN-AYUN MOSHE ,  ROZENTAL MARK

    IPC: H01Q1/24 ,  H01Q5/10 ,  H01Q21/06

    Abstract: A multiple radio frequency (RF) band antenna arrangement 1100 comprises plural resonators 1103, 1105, 1109 formed from a plurality of conductive wires where the wires are mutually adjacent. The arrangement includes plural RF channels, each of which provides RF signals between a respective radio unit and a respective resonator. At least three of the wire elements have different lengths. The wire elements provide RF signals in at least two different frequency bands. The wire elements may comprise straight 1109 and/or folded 1103 and/or branched 1105 and/or helical monopole resonator elements. The wire resonator elements may be arranged in a parallel manner with a regular base configuration on a circuit board such that they can be located within a single elongate casing. Electrical connections to the wire elements may be made using a plug and socket connector arrangement. The wire resonator elements may include elements which are driven via parasitic coupling with other elements. Each of the RF feed channels may include a control device which can switch between short and open circuit conditions for signals at frequencies outside that of the intended resonator. The arrangement is intended to provide a lightweight, compact antenna configuration which can operate efficiently in at least two widely separate broad frequency bands.

    59.
    发明专利
    未知

    公开(公告)号：DE60213439D1

    公开(公告)日：2006-09-07

    申请号：DE60213439

    申请日：2002-06-03

    Applicant: MOTOROLA INC

    Inventor： BEN-AYUN MOSHE ,  ROZENTAL MARK ,  PASTERNAK ROMAN

    IPC: H03G3/30 ,  H03G3/20

    Abstract: An automatic gain control (AGC) circuit including: a forward transmission path ( 214 ) having applied at its input an input RF signal and to provide at its output an output signal; a variable gain AGC amplifier ( 210 ) in the forward transmission path for processing the input RF signal, which amplifier has a control input 240 and is responsive to a control signal applied at its control input to vary its gain; a feedback loop ( 220 to 240 ), coupled from the output of the forward transmission path and to the control input of the AGC amplifier; an integrator ( 230, 232 ), coupled to the control input of the amplifier; a voltage source ( 234 ), coupled to the integrator and to the control input of the amplifier; and a further variable gain device ( 215 ) for varying the gain or attenuation of a signal applied to the control input of the AGC amplifier.

    60.
    发明专利
    未知

    公开(公告)号：AT334505T

    公开(公告)日：2006-08-15

    申请号：AT02730287

    申请日：2002-06-03

    Applicant: MOTOROLA INC

    Inventor： BEN-AYUN MOSHE ,  ROZENTAL MARK ,  PASTERNAK ROMAN

    IPC: H03G3/20 ,  H03G3/30

    Abstract: An automatic gain control (AGC) circuit including: a forward transmission path ( 214 ) having applied at its input an input RF signal and to provide at its output an output signal; a variable gain AGC amplifier ( 210 ) in the forward transmission path for processing the input RF signal, which amplifier has a control input 240 and is responsive to a control signal applied at its control input to vary its gain; a feedback loop ( 220 to 240 ), coupled from the output of the forward transmission path and to the control input of the AGC amplifier; an integrator ( 230, 232 ), coupled to the control input of the amplifier; a voltage source ( 234 ), coupled to the integrator and to the control input of the amplifier; and a further variable gain device ( 215 ) for varying the gain or attenuation of a signal applied to the control input of the AGC amplifier.

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