Level meter circuit

Details Level meter circuit Level meter circuit

1981-08-12

1984-10-30

Levy, Stewart J.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Using radiant energy

340660, G01R 3100

Patent

active

044802218

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.

REFERENCES:
patent: 3818495 (1974-06-01), Sagara et al.
patent: 4004220 (1977-01-01), Kerber et al.
patent: 4065716 (1977-12-01), O'Brien
patent: 4096435 (1978-06-01), Sabe
patent: 4166245 (1979-08-01), Roberts
patent: 4241342 (1980-12-01), Merriweather

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