Digital level indicating device

Details Digital level indicating device Digital level indicating device

1987-08-19

1989-09-26

Karlsen, Ernest F.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Demand, excess, maximum or minimum

324115, 324132, G01R 1916, G01R 1508

Patent

active

048703494

ABSTRACT:
A digital level indicating device for use in compact disk players digital audio tape recorders, etc., which includes a converter circuit for converting a digital signal applied thereto to an absolute value signal representative of an absolute value of the digital signal. A peak holding circuit detects and holds a peak of the absolute value signal. A first decoder log-converts the absolute value signal. A second decoder log-converts a signal held by the peak holding circuit. Indicator means display a level of the digital signal in accordance without puts from both the first and second decoder. A selector switches the choices of resolution of the first decoder and the second decoder.

REFERENCES:
patent: 4166245 (1979-04-01), Roberts
patent: 4183025 (1980-01-01), Kutaragi et al.
patent: 4262255 (1981-04-01), Kokei et al.

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