Patents Assigned to Trio Kabushkik Kaisha
  • Level meter circuit
    Patent number: 4480221
    Abstract: A level meter circuit for displaying the level of an input signal by the use of a number of light emitting diodes. The circuit has a parallel circuit of a plurality of unit circuits each having a diode circuit and a current control transistor connected in series with the parallel circuit and controlled by the input signal, the level of which is to be displayed. In accordance with the input signal level to be displayed, one or more of the diodes are activated to emit light, thus providing a display of the input signal level.
    Type: Grant
    Filed: August 12, 1981
    Date of Patent: October 30, 1984
    Assignee: Trio Kabushkik Kaisha
    Inventor: Kazuo Shozima