Patents Assigned to Chronolog Systems Limited
  • Analogue voltage indicator with sequence of light emitting diodes
    Patent number: 4243985
    Abstract: A circuit serves to illuminate appropriate light emitting diodes of a sequence to provide a bar graph type display of an analogue input voltage. The light emitting diodes are divided into sets with each set being associated with a respective signal processing element which may be a differential amplifier supplied with the analogue input voltage at one input terminal and a unique off-set voltage at the other. The signal processing elements handle respective contiguous ranges of the analogue voltage and the required supply voltage is reduced.
    Type: Grant
    Filed: May 4, 1978
    Date of Patent: January 6, 1981
    Assignee: Chronolog Systems Limited
    Inventor: Ian H. Quayle