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Calibration of a frequency converter, based on dc measurements, to reduce an output dc component arising from local oscillator leakage and self-mixing
Calibration of a frequency converter, based on dc measurements, to reduce an output dc component arising from local oscillator leakage and self-mixing
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机译:基于直流测量对变频器进行校准,以减少由本地振荡器泄漏和自混频引起的输出直流分量
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摘要
A frequency converter comprises a mixer and a variable load arranged to act on at least one of an input and an output of the mixer, and a detector arranged to detect a direct current component of an output signal of the converter. A plurality of states of the variable load are sequentially set and a variation between the direct current components for each one of the plurality of states of the variable load is observed, and at least one parameter influencing the direct current component of the output signal of the frequency converter is adjusted such that the observed variation is reduced. The technique reduces a direct current component at the output of frequency converter arising from leakage of the local oscillator signal and self mixing.
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