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Verfahren und Schaltung zum Reduktion von Lokaloszillatorstrahlung in einen Funksendeempfänger
Verfahren und Schaltung zum Reduktion von Lokaloszillatorstrahlung in einen Funksendeempfänger
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机译:减少无线电收发机中本地振荡器辐射的方法和电路
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摘要
A circuit and method for reducing local oscillator frequency transmission in a homodyne, or direct conversion, radio transceiver using I/Q modulation/demodulation minimizes local oscillator leakage to the antenna and its subsequent reception by the receiver by interfacing I/Q input signals to the modulator in a controlled manner so as to increase isolation during reception by presenting high impedance states to the I/Q modulator input terminals during reception thereby nulling the carrier during reception.
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