ALL-CHANNEL TUNER

An all-channel tuner using varactors in the tuner circuit comprises a selector shaft which is disposed axially movably and rotatably, and which has the first gear at the rear end; the second and third gears which selectively mesh with the first gear upon axial movements of said shaft; a planetary mo...

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Bibliographic Details
Main Author KONDO M,JA
Format Patent
LanguageEnglish
Published 02.01.1973
Subjects
BASIC ELECTRONIC CIRCUITRY
ELECTRICITY
SELECTING RESONANT CIRCUITS
TUNING RESONANT CIRCUITS
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Summary:An all-channel tuner using varactors in the tuner circuit comprises a selector shaft which is disposed axially movably and rotatably, and which has the first gear at the rear end; the second and third gears which selectively mesh with the first gear upon axial movements of said shaft; a planetary motion mechanism section which couples both the gears at predetermined reduction gear ratios by the planetary motion; and a variable resistor which is coupled to the planetary mechanism, and which adjusts an applied voltage to the varactors. The tuner circuit is tuned by the change in the applied voltage of the varactors.
Bibliography:Application Number: USD3707877