High-harmonic-rejection-ratio mixer circuit
A mixing circuit and harmonic suppression technology, applied in the field of high harmonic suppression ratio mixing circuits, can solve the problems of high harmonic component signal quality influence, etc., and achieve the effect of improving the harmonic suppression ratio
Pending Publication Date: 2020-05-29
VERISILICON MICROELECTRONICS SHANGHAI +1
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Problems solved by technology
[0005] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a high harmonic rejection ratio mixing circuit, which is used to solve the problem that the high-order harmonic components in the output signal of the mixer in the prior art have an impact on the signal quality. question
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[0041] Embodiments of the present invention are described below through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation modes, and various modifications or changes can be made to the details in this specification based on different viewpoints and applications without departing from the spirit of the present invention.
[0042] see Figure 1 to Figure 5 . It should be noted that the diagrams provided in this embodiment are only schematically illustrating the basic idea of the present invention, and only the components related to the present invention are shown in the diagrams rather than the number, shape and shape of the components in actual implementation. Dimensional drawing, the type, quantity and proportion of each component can be changed arb...
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The invention provides a high-harmonic-rejection-ratio mixer circuit, and the circuit comprises a multi-phase generating module which receives a first input signal and generates eight paths of first square wave signals with a phase difference of 45 DEG; a quadrature phase generation module which is used for receiving the second input signal and generating four paths of second square wave signals with the phase difference of 90 degrees; a harmonic suppression module which is connected to the output end of the quadrature phase generation module and is used for filtering high-frequency harmonic components in the second group of square wave signals; and a frequency mixing module which is connected to the output ends of the multi-phase generation module and the harmonic suppression module and is used for mixing the output signals of the multi-phase generation module and the harmonic suppression module. According to the high-harmonic-rejection-ratio frequency mixing circuit, the harmonic suppression module is added on the basis of multi-phase frequency mixing, higher harmonic components of signals are filtered out at the input end, and therefore the harmonic rejection ratio of output signals is increased.
Description
technical field [0001] The invention relates to the technical field of wireless communication, in particular to a high harmonic suppression ratio frequency mixing circuit. Background technique [0002] In recent years, with the development of portable devices and the increase of consumption scenarios, people's demand for various wireless products is also increasing, and mixers have always occupied a very important position in wireless transceivers. At the transmitting end, the mixer is responsible for up-converting the intermediate frequency signal to the radio frequency band, thus making the antenna smaller and the device more portable; at the receiving end, the mixer needs to down-convert the useful signal from the radio frequency band To the intermediate frequency band, after digital-to-analog conversion operation, such a signal is more conducive to the analysis and processing of the received signal by using the existing powerful digital signal processing capability, and ...
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IPC IPC(8): H03D7/12
CPCH03D7/12H03D7/1441H03D7/1458H03D7/1483H03D7/165H03D7/1425H03D7/1475H03D2200/0082H04B1/0475
Inventor 李玉马鹏曾毅王胜磊钱哲弘
Owner VERISILICON MICROELECTRONICS SHANGHAI