Transmit and receive switch with transformer
AssigneeTexas Instruments Incorporated
InventorsTolga DINC, Swaminathan SANKARAN
Life of this patent
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Abstract
In examples, an electronic device includes an antenna and a transmitter line. The transmitter line includes a double-tuned transformer having first and second windings, the first winding having first and second ends, the second winding having third and fourth ends, and the third end coupled to the antenna. The transmitter line includes a first capacitor coupled between the first and second ends. The transmitter line also includes a second capacitor coupled between the third and fourth ends, and a switch coupled between the first end and a reference terminal.
Claims20
An electronic device, comprising:
- an antenna;
- and
- a transmitter line, comprising:
- a double-tuned transformer having first and second windings, the first winding having first and second ends, the second winding having third and fourth ends, and the third end coupled to the antenna;
- a first capacitor coupled between the first and second ends;
- a second capacitor coupled between the third and fourth ends;
- and
- a switch coupled between the first end and a reference terminal.
An electronic device, comprising:
- an antenna;
- and
- a transmitter line coupled to the antenna, the transmitter line comprising:
- a transformer having first and second windings, the first winding having first and second ends and the second winding having third and fourth ends, the transformer configured to operate as:
- a bandpass filter in a transmit mode;
- and an impedance inverter in a receive mode;
- a first capacitor coupled between the first and second ends;
- a second capacitor coupled between the third and fourth ends;
- and
- a switch coupled between the first and second ends, the switch configured to open in the transmit mode and close in the receive mode.
An electronic device, comprising:
- a controller;
- an antenna;
- and
- a transceiver coupled to the controller and to the antenna, the transceiver comprising:
- a transmitter line including a transformer and first and second capacitors, the transformer having first and second windings, the first winding having first and second ends, and the second winding having third and fourth ends, the first capacitor coupled between the first and second ends, the second capacitor coupled between the third and fourth ends, and a first switch coupled between the first and second ends, the antenna coupled to the third end;
- and
- a receiver line including second and third switches, the second switch coupled between the third end and the third switch, and the third switch coupled between the second switch and a reference terminal.
Dependencies are inferred from the claim text.