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US 9,793,935 B2Granted
Multi-mixer system and method for reducing interference within multi-mixer system
AssigneeMediatek Inc.
InventorsYing-Tsang Lu, Yen-Hung Kuo, Yuan-Yu Fu, Chinq-Shiun Chiu
Life of this patent
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Abstract
A multi-mixer system includes an amplifier module and a plurality of channels. The amplifier module is arranged for receiving signals from an antenna or antenna arrays to generate a plurality of radio frequency (RF) input signals. The plurality of channels are coupled to the amplifier module, wherein the plurality of channels receive the RF input signals, respectively, and each of the channels includes a mixer for mixing one of the RF input signals with a local oscillating signal to generate a mixed signal. In addition, at least one of the channels includes an interference reduction circuit positioned between the amplifier module and the mixer.
Claims26
A multi-mixer system, comprising:
- an amplifier module, for receiving signals from at least an antenna to generate a plurality of radio frequency (RF) input signals;
- and
- a plurality of channels coupled to the amplifier module, wherein the plurality of channels receive the RF input signals, respectively, and each of the channels comprises a mixer for mixing one of the RF input signals with a local oscillating signal to generate a mixed signal;
- wherein at least one of the channels comprises an interference reduction circuit configured between the amplifier module and the mixer;
- wherein the at least one of the channels comprises a first sub-channel and a second sub-channel for receiving the same RF input signal, the first sub-channel comprises a first mixer and the interference reduction circuit configured between the amplifier module and the first mixer, the second sub-channel comprises a second mixer, and oscillation signals used by the first mixer and the second mixer have a same frequency, and only one of the first sub-channel and the second sub-channel is enabled to generate the mixed signal;
- wherein when the oscillating signal used by the first mixer or the second mixer satisfies a specific condition, the first sub-channel is enabled to generate the mixed signal, and the second sub-channel is disabled;
- and when the oscillating signal used by the first mixer or the second mixer does not satisfy the specific condition, the first sub-channel is disabled, and the second sub-channel is enabled to generate the mixed signal.
4 more elements
A method for reducing interference within a multi-mixer system, wherein the multi-mixer system comprises:
- an amplifier module, for receiving signals from at least an antenna to generate a plurality of radio frequency (RF) input signals;
- and
- a plurality of channels coupled to the amplifier module, wherein the plurality of channels receive the RF input signals, respectively, and each of the channels comprises a mixer for mixing one of the RF input signals with a local oscillating signal to generate a mixed signal;
- and the method comprises:
- reducing an interference of the oscillating signal between the amplifier module and the mixer;
- wherein the at least one of the channels comprises a first sub-channel and a second sub-channel for receiving the same RF input signal, the first sub-channel comprises a first mixer, the second sub-channel comprises a second mixer, and oscillation signals used by the first mixer and the second mixer have a same frequency, and the step of reducing the interference of the oscillating signal between the amplifier module and the mixer comprises:
- using an interference reduction circuit configured between the amplifier module and the first mixer to reduce the interference of the oscillating signal between the amplifier module and the first mixer;
- wherein no interference reduction circuit is configured between the amplifier module and the second mixer;
- and
- the method further comprises:
- selectively choosing one of the first sub-channel and the second sub-channel to generate the mixed signal.
8 more elements
A multi-mixer system, comprising:
- an amplifier module, for receiving signals from at least an antenna to generate a plurality of radio frequency (RF) input signals;
- and
- a plurality of channels coupled to the amplifier module, wherein the plurality of channels receive the RF input signals, respectively, and each of the channels comprises a mixer for mixing one of the RF input signals with a local oscillating signal to generate a mixed signal;
- wherein at least one of the channels comprises an interference reduction circuit configured between the amplifier module and the mixer, and the interference reduction circuit comprises an inductor, wherein one terminal of the inductor receives the RF input signal, and the other terminal of the inductor is connected to the mixer;
- wherein the at least one of the channels comprises a first sub-channel and a second sub-channel for receiving the same RF input signal, the first sub-channel comprises a first mixer and the interference reduction circuit configured between the amplifier module and the first mixer, the second sub-channel comprises a second mixer, and oscillation signals used by the first mixer and the second mixer have a same frequency, and only one of the first sub-channel and the second sub-channel is enabled to generate the mixed signal;
- wherein when the oscillating signal used by the first mixer or the second mixer satisfies a specific condition, the first sub-channel is enabled to generate the mixed signal, and the second sub-channel is disabled;
- and when the oscillating signal used by the first mixer or the second mixer does not satisfy the specific condition, the first sub-channel is disabled, and the second sub-channel is enabled to generate the mixed signal.
4 more elements
Dependencies are inferred from the claim text.