Special multichannel radio frequency echo signal down converter for MR-EPT spectrometer
A technology of echo signal and radio frequency signal, applied in the field of MR-EPT imaging, to achieve the effect of high output signal quality, strong controllability, effective and convenient range
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[0048] A preferred embodiment of the present invention provides a dedicated multi-channel radio frequency echo signal downconverter for MR-EPT spectrometer, the input end of which is connected to the echo signal receiving coil of the MR-EPT system, and the output end is connected to the existing magnetic resonance The echo signal receiving end of the spectrometer, such as figure 1 As shown, it includes a local oscillator signal generation module, a power division module, and a frequency mixing, amplitude modulation and phase modulation unit connected in sequence, and a control module connected with the frequency mixing, amplitude modulation and phase modulation unit and the local oscillator signal generation module;
[0049] The control module controls the frequency of the local oscillator signal output by the local oscillator signal generation module, and controls the frequency mixing, amplitude modulation and phase modulation unit to adjust the amplitude and phase of the output s...
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