Patents by Inventor Wolf Ohl

Wolf Ohl has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Network termination and network termination arrangement of a telecommunications network
    Patent number: 5694398
    Abstract: A network termination (NT) with a network interface (U.sub.KO), several subscriber interfaces (S.sub.O 1, S.sub.O 2), a control unit (CPU) and an internal bus (IBUS) is indicated for a telecommunications network. Information is transmitted on the network side in a frame structure by the time division multiplex method. The frame structure contains several useful information channels and one or more signaling channels. The control unit (CPU) assigns the useful information channels to the terminals in such a way, that each terminal has at least one channel available for the transmission of useful information. In addition, the network terminations (NT) of several subscribers are combined in the circuit of a network termination arrangement (NTE) outside of the subscribers' premises, and is jointly supplied by a voltage transformer (ACDC). A power supply that is independent of the telecommunications network supplies the voltage transformer (ACDC).
    Type: Grant
    Filed: May 31, 1996
    Date of Patent: December 2, 1997
    Assignee: Alcatel N.V.
    Inventors: Reinhard Doll, Siegfried Schmoll, Wolf Ohl
  • Circuit arrangement for a selective signal receiver, particularly for use in telephone systems
    Patent number: 3971897
    Abstract: Selective digital signal receiver wherein the time distances between zero crossings of the input voltage are measured with a counter. The zero-crossing counter is preceded by a circuit which, when a zero crossing occurs, is changed to the "on" state, resulting in a counting pulse for the counter, and remains in this state for a dwell time which is only little shorter than the signal-frequency half cycle. Thus, interference pulses can no longer invalidate the counting result of each signal-recognition operation.
    Type: Grant
    Filed: August 15, 1974
    Date of Patent: July 27, 1976
    Assignee: International Standard Electric Corporation
    Inventors: Wolf Ohl, Herbert Ball
  • Method for frequency-recognition in selective signal receivers for use in telecommunication, particularly telephone systems
    Patent number: 3949177
    Abstract: Selective digital signal receiver wherein the time distances between zero crossings of the input voltage are measured with a counter controlled at a clock frequency which is high compared with the signal frequency. The main check, covering a plurality of cycles and a predetermined bandwith, is always preceded by a pre-check, covering few cycles and a larger bandwidth. This allows early recognition of push-button dial signals.
    Type: Grant
    Filed: August 15, 1974
    Date of Patent: April 6, 1976
    Assignee: International Standard Electric Corporation
    Inventors: Herbert Ball, Wolf Ohl
  • Selective signal receiver for use in telecommunication systems
    Patent number: 3935395
    Abstract: A selective digital signal receiver is disclosed in which the time distances between zero crossings of the input voltages are measured with a counter which is controlled at a clock frequency higher than the signal frequency. Each measurement covers a predetermined number of cycles. The greater the number of cycles chosen, the less the bandwidth must be widened for the zero-crossing shifts caused by noise.
    Type: Grant
    Filed: August 2, 1974
    Date of Patent: January 27, 1976
    Assignee: International Standard Electric Corporation
    Inventors: Herbert Ball, Wolf Ohl