Patents Represented by Attorney J. A. Kunkle
  • Patent number: 4787025
    Abstract: A remote fan out facility used in an information handling system including a plurality of data terminals located remotely from a central processor unit. Messages transmitted from the central processing unit to one of the plurality of data terminals are modified by creating and inserting a terminal device address into the outbound messages. The messages are then transmitted to a fan out box located near the addressed terminal. The fan out box strips the terminal address from the received message, decodes the stripped address, and directs the message to the appropriate data terminal according to the stripped decoded address. By this means, a single serial transmission link can be used to connect the central processing unit to a plurality of data terminals without undue modification of an existing system.
    Type: Grant
    Filed: February 5, 1988
    Date of Patent: November 22, 1988
    Assignee: International Business Machines Corporation
    Inventors: Harry Cheselka, Gerald J. Hladik, Chris Karabatsos, Lawrence G. Mosher, Richard M. Morrison
  • Patent number: 4599520
    Abstract: An FET double boosted clock driver for producing a clock signal having an amplitude greater than the drain supply voltage. The clock output of a second clock driver is capacitively coupled to the clock output of a first clock driver. The second clock driver boosts the voltage on the source of an enhancement mode (output) FET of the first clock driver. The output FET has its gate connected to a bootstrapped node and its drain connected to a drain voltage source (VDD). A depletion mode FET forms a feedback path between the source of the output node FET and the bootstrapped node. When the bootstrapped node is bootstrapped to VDD+VT, the output FET precharges the clock output to VDD. When the potential of the clock output approaches VDD, the depletion mode FET discharges the bootstrapped node to an input clock.
    Type: Grant
    Filed: January 31, 1984
    Date of Patent: July 8, 1986
    Assignee: International Business Machines Corporation
    Inventors: John A. Gabric, Edward F. O'Neil