Transmit and receive switch with transformer
AssigneeTexas Instruments Incorporated
InventorsTolga Dinc, Swaminathan Sankaran
Life of this patent
Estimating the term…
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.
Claims26
An electronic device, comprising:
- a first winding having first and second ends and coupled to a first terminal;
- a second winding having third and fourth ends and coupled to a second terminal;
- a first capacitor coupled between the first and second ends;
- a second capacitor coupled between the fourth and third ends;
- and
- a switch, wherein the switch and the first capacitor are coupled in parallel between the first and second ends, and the switch is configurable to shunt at least the first capacitor.
An electronic device, comprising:
- a first winding having first and second ends and coupled to a first terminal;
- a second winding having third and fourth ends and coupled to a second terminal;
- a first capacitor coupled between the first and second ends;
- a second capacitor coupled between the fourth and third ends;
- and
- a switch coupled between the first and second ends, the switch configurable to open in a transmit mode and close in a receive mode.
An electronic device, comprising:
- a first winding having first and second ends and coupled to a first terminal;
- a second winding having third and fourth ends and coupled to an antenna terminal;
- a first capacitor coupled between the first and second ends;
- a second capacitor coupled between the fourth and third ends;
- a first switch coupled between the first and second ends;
- a second switch coupled between the third and fourth ends;
- and
- a third switch coupled between a second terminal and the third or fourth end.
Dependencies are inferred from the claim text.