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Portable data entry device

  • US 4,125,871 A
  • Filed: 02/07/1977
  • Issued: 11/14/1978
  • Est. Priority Date: 08/11/1975
  • Status: Expired due to Term
First Claim
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1. A portable data entry device comprising:

  • a housing of size and configuration for portable use;

    a dynamic continuously clocked serial solid state memory within said housing, said memory having a minimum useable clock rate which is a function of operating temperature, and having input and output stages;

    means on said housing for manual entry of data into said memory;

    control means on said housing for manual accessing of locations within said memory for review of data previously entered in said memory locations;

    a display on said housing for visual representation of data stored in said memory by said manual entry means;

    means within said housing for energizing said device;

    connector means on said housing for connection to a data utilization system by which data stored in said memory can be conveyed to said data utilization system; and

    clock means for providing clock signals to said memory and in which the power consumption of the clock means is related to the rate of clock signals therefrom, and including temperature sensing means for sensing an operating temperature and means for varying the rate of said clock signals in accordance with sensed operating temperature to provide clock signals of said minimum rate for the sensed operating temperature thereby to provide proper memory operation at minimum power consumption.

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