71.
    发明专利
    未知

    公开(公告)号:FR2356325A1

    公开(公告)日:1978-01-20

    申请号:FR7716040

    申请日:1977-05-17

    Applicant: IBM

    Abstract: In an extension line circuit, an off-hook condition is detected during ringing by superimposing in each ringing cycle the values of the line current existing at two sampling instants exactly one-half cycle apart, and testing whether the sum (or mean value) exceeds a given threshold. When DC current starts flowing due to the set going off-hook, the mean value of the two values will pass a threshold.

    72.
    发明专利
    未知

    公开(公告)号:FR2343378A1

    公开(公告)日:1977-09-30

    申请号:FR7702068

    申请日:1977-01-18

    Applicant: IBM

    Abstract: This invention comprises a telephone hybrid circuit having two opto-coupler arrangements for transferring voice signals from the two-wire line to a port of the switching system on one hand and from a port of the switching system to the two-wire line on the other hand. In addition, a pair of feeder circuits in the form of current sources comprising active elements are provided for feeding a constant positive direct current to one wire of the two-wire line and a negative direct current of equal magnitude to the other wire of the two-wire line. Each of the current sources includes control circuitry for maintaining a constant ratio between the current furnished by the current source and a control current common to both current sources. A control current path is connected to the output of one of the opto-coupler arrangements for generating a common control current in response to a dc signal and a superimposed voice signal received from a port of the switching system. The other opto-coupler arrangement couples the signals from the two-wire line to a port of the switching system.

    75.
    发明专利
    未知

    公开(公告)号:DE2133322A1

    公开(公告)日:1972-01-20

    申请号:DE2133322

    申请日:1971-07-05

    Applicant: IBM

    Abstract: A field-effect transistor is inserted in the series feedback path of a bipolar transistor at whose base terminal the analog input signal to be sampled is applied. The bipolar transistor is continuously maintained in its conductive state by drawing a current I0 from the emitter. The field-effect transistor is switched back and forth between its high and low impedance states by a sampling signal applied to its gate. The analog input signal is amplified, and therefore sampled, only when the field-effect transistor is in its low impedance state.

    77.
    发明专利
    未知

    公开(公告)号:DE69838327D1

    公开(公告)日:2007-10-11

    申请号:DE69838327

    申请日:1998-10-30

    Applicant: IBM

    Abstract: A scanning or positioning system with at least two degrees of freedom is provided comprising a supporting base (6) equipped with magnets (7.1), a movable platform (1) equipped with at least two electrical coils (2) and suspension elements (4) providing an elastic connection between the movable platform and the supporting base. The electrical coils (2) are positioned flat on the movable platform (1), thereby forming an essentially flat arrangement with the movable platform. Combining the flat arrangement with the flat supporting base yields a scanning or positioning system which is potentially compact, lightweight and flat and which features fast response, low power consumption and a relatively large range of motion, e.g. up to 10mm. The scanning or positioning system with at least two degrees of freedom can be used in the field of scanning probe microscopy or in the field of data storage or imaging.

    78.
    发明专利
    未知

    公开(公告)号:DE60209333D1

    公开(公告)日:2006-04-27

    申请号:DE60209333

    申请日:2002-03-15

    Applicant: IBM

    Abstract: A method for writing data to and/or reading data from locations on a surface via a tip comprises moving the tip between the locations on the surface. At each location, energy is selectively applied to the surface via the tip and the tip and the surface are selectively forced together in synchronization with the application of energy.

    THERMAL MOVEMENT SENSOR
    79.
    发明专利

    公开(公告)号:AU2003253213A1

    公开(公告)日:2004-03-19

    申请号:AU2003253213

    申请日:2003-08-22

    Applicant: IBM

    Abstract: A transducer for detecting movement of an article mounted for movement in a plane, the transducer comprising: a heater facing the plane of movement of the article and having a temperature dependent resistance; and, an edge defined in the article between regions of different thermal conductivity; wherein, as the article describes the movement, the edge moves relative to the heater producing a corresponding variation in heat loss from the heater and a corresponding variation in resistance of the heater.

    Apparatus and method for storing and reading high data capacities

    公开(公告)号:AU2002237483A1

    公开(公告)日:2002-10-08

    申请号:AU2002237483

    申请日:2002-03-14

    Applicant: IBM

    Abstract: In accordance with the present invention, there is provided an apparatus comprising a tape having an information layer on which information is storable in the form of perturbations, an array of probes that in function faces the tape such that the probes scan the surface of the tape, means for selectively forming the perturbations via the probes, means for detecting the presence of the perturbations via the probes, and drive means for moving the tape relative to the array of probes. The apparatus allows to store high data capacities at a small form factor.

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