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US 2015/0084683 A1Published application
Harmonic rejection mixer
AssigneePanasonic Corporation
InventorsMasahiro Kumagawa, Yuusuke Yamaoka
Life of this patent
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Abstract
A harmonic rejection mixer is disclosed that is capable of supporting wideband reception without any increase in circuit area. In this apparatus, transistors convert an RF signal to currents. Transistors perform frequency conversion based on the currents from the transistors and local oscillation signals. Transistors distribute the currents from the transistors to all transistors or some transistors based on a predetermined ratio. A load adds up the currents from the transistors and converts the resultant current to a voltage.
Claims6
A harmonic rejection mixer comprising:
- 2N+1 gain devices that convert a radio frequency signal to currents;
- 2N+1 switching devices that perform frequency conversion based on the currents from the gain devices and local oscillation signals;
- an adder that adds up the currents from the switching devices and that converts a resultant current to a voltage;
- and
- a changeover switch that distributes the currents from the gain devices to the 2N+1 switching devices or N switching devices based on a predetermined ratio.
2 more elements
Dependencies are inferred from the claim text.