Modulator with harmonic mixers
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United States of America Patent
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May 16, 1995
Grant Date -
N/A
app pub date -
May 23, 1994
filing date -
May 23, 1994
priority date (Note) -
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Abstract
An improved modulator circuit for mixing a modulation signal with a carrier signal includes first and second harmonic mixers which are operative to produce modulated output signals at an output frequency corresponding to both the sum and the difference of the modulation signal frequency and the even harmonic frequencies of the carrier signal frequency. In one configuration employing a 90.degree. hybrid, the output signals of the harmonic mixers are combined to produce a single sideband modulated output signal. A novel harmonic mixer circuit is also provided along with demodulator circuits and methods of modulating and demodulating modulation signals.
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