Telecommunications – Receiver or analog modulated signal frequency converter – Convertible to different type
Patent
1997-01-23
1999-01-19
Vo, Nguyen
Telecommunications
Receiver or analog modulated signal frequency converter
Convertible to different type
455260, 455313, 455131, H04B 116
Patent
active
058624635
ABSTRACT:
A shortwave amplitude modulated broadcast converter having an antenna electrically connected to an output. The antenna functions to collect shortwave electromagnetic energy. Invention further includes a preselector having an input and an output. The preselector is electrically connected to an input to the antenna at an output and functions to filter unwanted noise from the antenna signal. A mixer having at least one input and an output is electrically connected to the preselector output at an input. The mixer functions to combine the filtered antenna signal and a band select signal to an output. A variable frequency oscillator having an output is electrically connected to a mixer input. The variable frequency oscillator frictions to provide a mixing frequency to the mixer. An output amplifier, having an input and an output, is electrically connected to the mixer and an input, where the output amplifier functions to amplify the combined antenna and variable frequency oscillator signals. The combined antenna and variable frequency oscillator signals are output to a radio receiver, i.e. AM or FM. A power source may be selected from the group consisting of batteries, recharageable batteries, solar, capacitive, and electro-mechanical to provide an electrical voltage to the components.
REFERENCES:
patent: 3360730 (1967-12-01), Sims
patent: 3983487 (1976-09-01), Ohno
patent: 4001729 (1977-01-01), Weinberger
patent: 4112377 (1978-09-01), Tanner
patent: 4266295 (1981-05-01), Bach, Jr.
patent: 4490837 (1984-12-01), Buchwald
patent: 5068918 (1991-11-01), Verheijen et al.
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