Mixer
A mixer and intermediate frequency technology, applied in the field of integrated circuit design, can solve the problems of increasing design costs and achieve the effect of reducing the amplitude
Pending Publication Date: 2019-07-26
STAR WAVE COMM CO LTD HEFEI
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Problems solved by technology
The corresponding solution is generally to add a filter circuit after the mixer circuit, which not only increases the design cost, but also brings great pressure on the space layout.
Method used
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[0014] In order to further illustrate the features of the present invention, please refer to the following detailed description and accompanying drawings of the present invention. The accompanying drawings are for reference and description only, and are not intended to limit the protection scope of the present invention.
[0015] Such as figure 1 As shown, this embodiment discloses a mixer, including: a first mixer 11, a second mixer 12, a first power divider 21 for inputting a local oscillator signal, and a first power divider 21 for inputting an intermediate frequency signal. A second power divider 22 and a combiner 23 for outputting radio frequency signals;
[0016] The two output terminals of the first power divider 21 are respectively connected with the local oscillator terminal of the first mixer 11 and the local oscillator terminal of the second mixer 12, and the two output terminals of the second power divider 22 are connected with the first mixer respectively. The i...
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The invention discloses a mixer, and belongs to the field of integrated circuit design. The mixer comprises a first mixer, a second mixer, a first power divider for inputting a local oscillator signal, a second power divider for inputting an intermediate frequency signal and a combiner for outputting a radio frequency signal. Two output ends of the first power divider are respectively connected with a local oscillation end of the first frequency mixer and a local oscillation end of the second frequency mixer. The two output ends of the second power divider are connected with the intermediate frequency end of the first mixer and the intermediate frequency end of the second mixer respectively. The radio frequency output end of the first mixer and the radio frequency output end of the secondmixer are connected with the input end of the combiner. A local oscillator signal is subjected to phase inversion by the power divider and then is leaked to a radio frequency port of the mixer, the phase difference is 180 degrees, a part of the signal is offset in amplitude, and then the signal is output by the 0-degree combiner, so that the amplitude of the local oscillator leakage signal is reduced.
Description
technical field [0001] The invention relates to the technical field of integrated circuit design, in particular to a mixer. Background technique [0002] At present, in the microwave field, the mixer is a microwave device that is widely used. It can be said that as long as it is a microwave component, most of them need a frequency mixing circuit, so the mixer is one of the essential components. one. [0003] In recent years, with the wide application of mixers, the requirements on the functions and indicators of mixers have become more and more stringent. The commonly used mixers in the past cannot avoid the leakage of local oscillator signals in use. The corresponding solution is generally to add a filter circuit after the frequency mixing circuit, which not only increases the design cost, but also brings great pressure on the space layout. Contents of the invention [0004] The object of the present invention is to provide a mixer to reduce the amplitude of the leakage...
Claims
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IPC IPC(8): H03D7/16
CPCH03D7/165
Inventor 陈剑虹张青刘宏胜倪红香胡万云
Owner STAR WAVE COMM CO LTD HEFEI