Multi-input mixer, mixer device, and mixing method
AssigneeRealtek Semiconductor Corp.
InventorsRen-Chieh Liu, Turgut Sefket Aytur
Life of this patent
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Abstract
A mixer device includes a differential circuit, a transconductance circuit, and a selecting circuit. The differential circuit receives a differential input signal and generates a differential output signal. The transconductance circuit is coupled to the differential circuit, receives a plurality of radio frequency input signals, and determines to mix at least one of the radio frequency input signals with the differential input signal according to an enable signal. The selecting circuit receives a control signal and generates the enable signal according to the control signal.
Claims25
A multi-input mixer comprising:
- a first differential pair circuit including a pair of transistors with source terminals coupled to each other, gate terminals of the pair of transistors receiving a differential input signal;
- a plurality of first transistors that are coupled in parallel, a drain terminal of each of the plurality of first transistors being coupled to the source terminals of the pair of transistors of the first differential pair circuit, gate terminals of the plurality of first transistors receiving a respective radio frequency input signal, each of the plurality of first transistors determining to mix the respective radio frequency input signal with the differential input signal to generate a first differential output signal at an output of the first differential pair circuit according to an enable signal;
- and
- a selecting circuit coupled to the gate terminals of the plurality of first transistors, for receiving a control signal and generating the enable signal.
A mixer device, comprising:
- a differential circuit for receiving a differential input signal and generating a differential output signal;
- a transconductance circuit, coupled to the differential circuit, for receiving a plurality of radio frequency input signals, and determining to mix at least one of the radio frequency input signals with the differential input signal according to an enable signal;
- and
- a selecting circuit, coupled to the transconductance circuit, for receiving a control signal and generating the enable signal according to the control signal.
A mixing method, comprising the steps of:
- receiving a differential input signal;
- receiving a plurality of radio frequency input signals;
- mixing one of the radio frequency input signals with the differential input signal according to a control signal to generate a differential output signal;
- and
- outputting the differential output signal.
Dependencies are inferred from the claim text.