Spectrum display apparatus

Details Spectrum display apparatus Spectrum display apparatus

1979-09-24

1981-12-22

Tokar, Michael J.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Analysis of complex waves

324121R, G01R 2316

Patent

active

043073409

ABSTRACT:
A spectrum display apparatus comprises a plurality of band-pass filters respectively having filtering bands of different center frequencies and operating to filter an input signal thereby to band-divide the input signal, a holding circuit normally passing the output signals of the band-pass filters and, upon the application thereto of a control signal, operating in response to the control signal to hold output signal voltages of the band-pass filters at the time of the control signal application, a display section having displaying elements of systems of the same number as the band-pass filters respectively corresponding to the band-pass filters, a circuit for supplying output signals of the holding circuit to the displaying elements and causing level displaying by the displaying elements of those systems corresponding respectively to the output signal levels of the band-pass filters, a control manipulation switch, and a circuit for producing the control signal and applying the same to the holding circuit during a specific time period after manipulation of the switch.

REFERENCES:
patent: 3581192 (1971-05-01), Miura
patent: 4085352 (1978-04-01), Hilton
patent: 4114095 (1978-09-01), Pankove

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