Mixer and mixing method
AssigneeGwangju Institute of Science and Technology
InventorsMinjae Lee, Dongju Lee
Life of this patent
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Abstract
Disclosed herein is a mixer. The mixer may include an MLO switching unit configured to include at least three MLO switches provided in odd numbers and configured to branch a signal from an input stage and to receive respective MLO signals and an LO switching unit configured to include pairs of LO switches connected in parallel to output sides of the MLO switches, wherein each of the pairs of LO switches corresponds to each of the MLO switches. Each of the pairs of LO switches is connected to the positive and negative intermediate frequency (IF) output sides so that the output sides of each of the pairs of LO switches alternately apply output signals to the positive and negative IF output sides when LO signals are sequentially input to each of the pairs of LO switches.
Claims12
A mixer, comprising:
- a master local oscillator (MLO) switching unit configured to comprise at least three MLO switches provided in odd numbers and configured to branch a signal from an input stage and to receive respective MLO signals;
- and
- a local oscillator (LO) switching unit configured to comprise pairs of LO switches connected in parallel to output sides of the MLO switches, wherein each of the pairs of LO switches corresponds to each of the MLO switches and output sides of each of the pairs of LO switches are connected to respective positive and negative intermediate frequency (IF) output sides,
- wherein each of the pairs of LO switches is connected to the positive and negative IF output sides so that the output sides of each of the pairs of LO switches alternately apply output signals to the positive and negative IF output sides when LO signals are sequentially input to each of the pairs of LO switches,
- wherein a signal having a frequency of 2fLOeff/n is input to the MLO switch,
- wherein a signal having a frequency of fLOeff/n is input to the LO switch,
- wherein “n” is the number of MLO switches, and
- wherein a flicker noise is up-converted into the frequency of fLOeff/n.
A mixer, comprising:
- an odd number of at least master local oscillator (MLO) switches configured to branch a high frequency signal and receive respective MLO signals;
- and
- pairs of local oscillator (LO) switches connected in parallel to output sides of the MLO switches and each configured to comprise each of the MLO switches,
- wherein output sides of each of the pairs of LO switches are respectively connected to separated positive and negative intermediate frequency (IF) output sides so that the output sides of the LO switches alternately output respective output signals to the positive and negative IF output sides, and
- wherein a flicker noise is up-converted in a signal similar to a sine wave signal.
A mixing method, comprising:
- inputting a high frequency signal;
- inputting master local oscillator (MLO) signals, each having a frequency of 2fLOeff/n, to MLO switches in a cascode way and inputting local oscillator (LO) signals, each having a frequency of fLOeff/n, to LO switches so that an output signal having a frequency of fLOeff is output to an intermediate frequency (IF) output side;
- and
- up-converting a flicker noise into a signal having the frequency of fLOeff/n,
- wherein the “n” is a number of MLO switches.
Dependencies are inferred from the claim text.