中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

5 records (took 0.017 seconds)

    PROGRAMMABLE COMMUNICATIONS SUBSYSTEM
    1.
    发明专利
    PROGRAMMABLE COMMUNICATIONS SUBSYSTEM 未知

    公开(公告)号：CA1118864A

    公开(公告)日：1982-02-23

    申请号：CA315395

    申请日：1978-10-31

    Applicant: IBM

    Inventor： NAGEL DENNIS M ,  O'NEAL DOUGLAS M ,  PETROSKEY PAUL W ,  VAN DEN BERG JAN W ,  WILDES DONALD V ,  WU DAVID C-K

    IPC: H04L69/14 ,  G06F13/00 ,  G06F13/22 ,  G06F13/40 ,  H04J3/16

    Abstract: PROGRAMMABLE COMMUNICATIONS SUBSYSTEM A micro processor controlled user programmable communications multiplexer subsystem (herein referred to by the symbol PCS) capable of transmitting and receiving data on any one or more of 32 communications lines simultaneously. Each line may be dynamically assigned to a variety of communication characteristics, such as line speeds, character lengths, synchronous, or asynchronous operation, and code structures as well as protocol selections. The system of the invention provides the capability for the user to write his communications programs using novel operations commands that provide code structure and protocol independence as well as communication line independence. Various hardware features and queuing techniques are employed in order to maintain high transmission rates. Variable line scanning in the Teleprocessing Time Division Multiplexer of the PCS is programmably permissible; i.e., the time base for line scanning is fixed and is a multiple of the communication line rate, although the actual line to be scanned is programmably variable. The program ability is provided by a continuously scanned storage array which contains physical line addresses of the time division multiplexer. The scanning mechanism, while running, prioritizes the transmit buffer servicing of the individual lines. BC9-77-00 DLM/TT25

    BATTERY OPERATED COMPUTER HAVING IMPROVED BATTERY GAUGE AND SYSTEM FOR MEASURING BATTERY CHARGE
    2.
    发明专利
    BATTERY OPERATED COMPUTER HAVING IMPROVED BATTERY GAUGE AND SYSTEM FOR MEASURING BATTERY CHARGE 未知

    公开(公告)号：CA2090707A1

    公开(公告)日：1993-10-17

    申请号：CA2090707

    申请日：1993-02-23

    Applicant: IBM

    Inventor： GLADSTEIN LEO ALBERT ,  JONES CHRISTOPHER D ,  LEONTIADES KYRIAKOS ,  PATEL PARITOSH D ,  PETROSKEY PAUL W

    IPC: G06F1/26 ,  G01R31/36 ,  G06F1/28

    Abstract: A digitizer tablet computer has a host processor connected to a service processor which, in turn, is connected to a digitizer controller and to a power subsystem microcontroller. A battery supplies the primary power for operating the computer but the computer is also connectable to an external source of DC power to charge the battery and to operate the computer when it is not running on battery power. The service processor includes a battery gauge the contents of which indicate how much power is left in the battery and how much time remains at the current rate of power consumption before the power runs out. The amount of remaining power in the gauge is determined by keeping track of power consumed, power added, and power lost during off periods. The use of the second derivative of a voltage versus time discharge curve creates a point from which relative accurate estimates can be made of how much longer the computer can be operated.

Patent Agency Ranking