Balun circuit and semiconductor device
AssigneeRenesas Electronics Corporation
InventorsKenichi SHIBATA, Yuichi KUSAKA
Life of this patent
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Abstract
A balun circuit is disclosed. The balun circuit is provided between a transmitter and a common antenna terminal to which the transmitter and a receiver are coupled. The balun includes an inductor L1 coupled at one or both ends to the transmitter, an input node of the receiver, and an inductor L2 provided between ground or a first biasing power supply. The inductor L2 includes an inductor having a mutual inductance with the inductor L1. The inductor L2 is a variable inductor.
Claims19
A balun circuit provided between a transmitter and a common antenna terminal to which the transmitter and a receiver are coupled, the balun circuit comprising:
- a first inductor coupled at one or both ends to the transmitter;
- and
- a second inductor provided between an input node of the receiver, and ground or a first bias power supply,
- wherein the second inductor comprises an inductor having a mutual inductance with the first inductor, and the second inductor is a variable inductor.
A semiconductor device comprising:
- a transmitter;
- a receiver;
- and
- a balun circuit provided between the transmitter and a common antenna terminal to which the transmitter and the receiver are coupled,
- wherein the balun circuit further comprises:
- a first inductor coupled at one or both ends to the transmitter;
- and
- a second inductor provided between an input node of the receiver, and ground or a first bias power supply,
- wherein the second inductor comprises an inductor having a mutual inductance with the first inductor, and the second inductor is a variable inductor.
Dependencies are inferred from the claim text.