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    BIDIRECTIONAL TRANSMISSION LINE DRIVER/RECEIVER
    2.
    发明专利
    BIDIRECTIONAL TRANSMISSION LINE DRIVER/RECEIVER 未知

    公开(公告)号：CA2206246A1

    公开(公告)日：1996-08-01

    申请号：CA2206246

    申请日：1996-01-19

    Applicant: IBM

    Inventor： FRANKENY RICHARD FRANCIS ,  SMADI MITHKAL MOH D ,  BEERS GREGORY EDWARD

    IPC: G06F3/00 ,  H04L5/14 ,  H04L25/02 ,  H03K19/0175

    Abstract: A method and apparatus are disclosed for sending and receiving logic signals. A driver is connected to a first end of a transmission line with a predetermined impedance and first and second transmission line ends for communicating the logic signals. The driver has a source for sending the logic signals, and a reference generator connected to the source for setting the magnitude of the signals sent by the source. A receiver is connected to the second transmission line end, and has a transmission line terminator for sinking the signals, and a reference generator connected to the terminator for setting a bias of the terminator to establish a certain family of terminator impedance for sinking the signals. The driver reference generator and the receiver reference generator interactively match the terminator impedance to the transmission line for the set magnitude of the signals.

    3.
    发明专利
    未知

    公开(公告)号：BR9002103A

    公开(公告)日：1991-08-13

    申请号：BR9002103

    申请日：1990-05-04

    Applicant: IBM

    Inventor： FRANKENY RICHARD FRANCIS ,  HAJ-ALI-AHMADI JAVED ,  IMKEN RONALD LANN ,  WUSTRAU ROLF

    IPC: H01R13/193 ,  H01R12/88 ,  H01R24/00 ,  H05K7/14 ,  H01R9/09

    Abstract: A system for providing low insertion force electrical interconnections between high density contacts for use in interconnecting circuit packages. A housing has disposed therein one or more pre-buckled beam connectors. Each connector has a resilient insulating strip carrying a plurality of buckling beams electrically isolated from each other. The beams are aligned on the plane defining the strip in parallel with ends extending away from the strip edges in opposing directions. Means are provided for deforming the strip within the housing prior to effecting desired interconnections whereby the beams are pre-buckled. Upon urging contacts into proximity with the beam ends, the buckling force is released causing each beam's ends to be urged away from the strip into engagement with respective contacts, thereby effecting desired interconnection between contacts and through one or more beams.

    5.
    发明专利
    未知

    公开(公告)号：NO802130L

    公开(公告)日：1981-01-19

    申请号：NO802130

    申请日：1980-07-15

    Applicant: IBM

    Inventor： CLANCY DOUGLAS EUGENE ,  FRANKENY RICHARD FRANCIS ,  OLSON GEORGE PETER

    IPC: H02P8/12 ,  H02P8/32 ,  H02P25/08 ,  H02P

    Abstract: A damping control system for a three phase stepper motor. A reluctance velocity transducer is used for each of the three phases. The output of each of the transducers is proportional to the rotational velocity of the motor. Each of the transducers is rotationally phase shifted 3.75 with respect to one another and phased to the motor rotor rotationally such that the zero voltage crossings of the transducers correspond to the zero torque crossings of the motor. During damping or detenting of the motor the selected phase has current applied to it which is equal to a predetermined fixed value plus the feedback from its associated transducer. The windings on each side of the detent position have current applied to them which is proportional to the voltage from their respective feedback transducers. The voltage in each of the windings is amplified by a selected gain constant. The current in each of the windings is such that maximum torque is applied to drive the motor to the detent position with appropriate current reversals in the windings to damp out any kinetic energy in the rotor during detenting.

    7.
    发明专利
    未知

    公开(公告)号：DE69714561D1

    公开(公告)日：2002-09-12

    申请号：DE69714561

    申请日：1997-10-28

    Applicant: IBM

    Inventor： FRANKENY RICHARD FRANCIS ,  VENKATRAMANI KRISHNAMURTHY

    IPC: G06F12/08 ,  G06F13/40

    Abstract: A current source based multilevel bus driver and converter suitable to simultaneously inject precise magnitudes of current from multiple locations into common lines of a bus and then detect analog sums of the net current. The analog current sums so detected are decoded into digital equivalents corresponding to the respective current injection sources. In a typical application the current source drivers and converter are located on separate integrated circuit chips. The reference node common to all the chips allows a reference generator on each chip to precisely define bias and transmitted current levels suitable to ensure precise values of injected current and to accurately differentiate between analog current levels in each line as an aspect of conversion into digital form and attribution as to origin.

    10.
    发明专利
    未知

    公开(公告)号：DE69010397D1

    公开(公告)日：1994-08-11

    申请号：DE69010397

    申请日：1990-04-23

    Applicant: IBM

    Inventor： ARLDT BRIAN DUDLEY ,  FRANKENY RICHARD FRANCIS ,  HAJ-ALI-AHMADI JAVAD ,  IMKEN RONALD LANN ,  WUSTRAU ROLF

    IPC: H01R13/193 ,  H01R12/88 ,  H01R24/00 ,  H05K7/14 ,  H01R23/72

    Abstract: A system for providing low insertion force electrical interconnections between high density contacts for use in interconnecting circuit packages. A housing has disposed therein one or more pre-buckled beam connectors. Each connector has a resilient insulating strip carrying a plurality of buckling beams electrically isolated from each other. The beams are aligned on the plane defining the strip in parallel with ends extending away from the strip edges in opposing directions. Means are provided for deforming the strip within the housing prior to effecting desired interconnections whereby the beams are pre-buckled. Upon urging contacts into proximity with the beam ends, the buckling force is released causing each beam's ends to be urged away from the strip into engagement with respective contacts, thereby effecting desired interconnection between contacts and through one or more beams.

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