MR-EPT spectrometer multichannel radio frequency excitation signal up-converter
An excitation signal and radio frequency signal technology, applied in the field of MR-EPT imaging, can solve the problem that the radio frequency excitation signal generator cannot meet the MR-EPT imaging and other problems, and achieve the effect of small leakage between channels, improved stability and less interference
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0036] An MR-EPT spectrometer multi-channel RF excitation signal upconverter, including an intermediate frequency signal processing module, a local oscillator signal generation module, a frequency mixing module, a filtering module, a power division module, a control module and an amplitude modulation and phase modulation module;
[0037] The intermediate frequency signal processing module is used to input the MR-EPT spectrometer signal, and the MR-EPT spectrometer signal is an intermediate frequency signal sent in the form of a differential signal, and its frequency is about 20-64MHz, which is sent into a two-stage bandpass filter In the process, the sideband is suppressed, and after impedance matching, it is input to the subsequent mixing module and the local oscillator for mixing;
[0038] The local oscillator signal generating module is used to output the local oscillator signal under the control of the control module; the local oscillator signal generating module includes a...
Embodiment 2
[0045] This embodiment provides a specific up-converter for multi-channel radio frequency excitation signals of an MR-EPT spectrometer.
[0046] The up-converter in this embodiment includes an intermediate frequency signal processing module, a local oscillator signal generating module, a frequency mixing module, a filtering module, a power dividing module, a control module and an amplitude modulation and phase modulation module;
[0047] The intermediate frequency signal processing module includes a two-stage bandpass filter for suppressing the sidebands of the input signal, and the bandpass filter adopts a model of PBP-35N;
[0048] The local oscillator signal generating module is used to output the local oscillator signal under the control of the control module; the local oscillator signal generating module includes a reference clock signal, a phase-locked loop, an integrated phase detector and a loop filter, in order to ensure the local oscillator signal Pure, the frequency r...
PUM
Login to View More Abstract
Description
Claims
Application Information
Login to View More