Piezoelectric ceramic transformer
阅读：930发布：2022-07-23
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1. A REVERSIBLE TRANSFORMER FOR COUPLING A RELATIVELY HIGH IMPEDANCE CIRCUIT TO A RELATIVELY LOW IMPEDANCE CIRCUIT AND FOR TRANSFERRING ENERGY IN THE FORM OF ELECTRIC WAVES OF SELECTED FREQUENCIES FROM ONE SAID CIRCUIT TO THE OTHER COMPRISING: A THIN, AXIALLY POLARIZED, DISCOID, PIEZOELECTRIC, CERAMIC BODY HAVING FIRST AND SECOND PARALLEL FACES, SAID BODY ALSO HAVING SUBSTANTIALLY ITS ENTIRE PIEZOELECTRIC RESONANCE RESPONSE IN THE RADIAL MODE; A PAIR OF LIKE, SEMICIRCULAR ELECTRODES APPLIED TO SAID FIRST FACE, SAID ELECTRODES BEING SPACED APART ALONG A DIAMETRIC STRIP OF SAID FIRST FACE AND EACH OF SAID ELECTRODES COVERING SUBSTANTIALLY ONE-HALF OF THE REMAINDER OF SAID FIRST FACE; ADDITIONAL ELECTRODE MEANS OPPOSING SAID PAIR OF ELECTRODES, SAID ADDITIONAL ELECTRODE MEANS BEING APPLIED TO AND COVERING SUBSTANTIALLY THE ENTIRETY OF SAID SECOND FACE, THE RATIO OF THE IMPEDANCE BETWEEN ONE OF SAID ELECTRODES AND SAID OPPOSING ELECTRODE MEANS TO THE IMPEDANCE BETWEEN THE OTHER OF SAID ELECTRODES AND SAID OPPOSING ELECTRODE MEANS BEING APPROXIMATELY 1:1; FIRST CONDUCTING MEANS FOR ELECTRICALLY COUPLING EITHER OF SAID ELECTRODES AND SAID OPPOSING ELECTRODE MEANS TO SAID RELATIVELY HIGH IMPEDANCE CIRCUIT; AND SECOND CONDUCTING MEANS FOR ELECTRICALLY COUPLING THE OTHER OF SAID ELECTRODES AND SAID OPPOSING ELECTRODE MEANS TO SAID RELATIVELY LOW IMPEDANCE CIRCUIT, THE DIRECTION OF COUPLING THROUGH SAID TRANSFORMER BEING IMMATERIAL; SAID BODY HAVING A DIAMETER SUCH THAT WHEN SAID TRANSFORMER IS COUPLED BETWEEN SAID CIRCUITS SO AS TO RESONATE, SAID TRANSFORMER PASSES ELECTRIC WAVES OF ONLY SAID SELECTED FREQUENCIES AND MATCHES SAID HIGH IMPEDANCE CIRCUIT TO SAID LOW IMPEDANCE CIRCUIT.
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