Dynamically configurable transmitter power levels
AssigneeTexas Instruments Incorporated
InventorRohit Chatterjee
Life of this patent
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Abstract
In many examples, a device comprises a transmitter. The transmitter comprises a power amplifier, a first transformer coil coupled to the power amplifier, and a second transformer coil adapted to be electromagnetically coupled to the first transformer coil. The transmitter also comprises a first bond wire coupled to a first end of the second transformer coil and adapted to be coupled to a first end of an antenna, a capacitor coupled to a second end of the second transformer coil, a switch coupled to the capacitor and configured to engage and disengage the capacitor from the transmitter, and a second bond wire coupled to the switch and adapted to be coupled to a second end of the antenna.
Claims21
A device, comprising:
- a transmitter, comprising:
- a power amplifier;
- a first transformer coil coupled to the power amplifier;
- a second transformer coil adapted to be electromagnetically coupled to the first transformer coil;
- a first bond wire coupled to a first end of the second transformer coil and adapted to be coupled to a first end of an antenna;
- a capacitor coupled to a second end of the second transformer coil;
- a switch coupled to the capacitor and configured to engage and disengage the capacitor from the transmitter;
- and
- a second bond wire coupled to the switch and adapted to be coupled to a second end of the antenna.
A device, comprising:
- a transmitter, comprising:
- a power amplifier;
- a first transformer coil coupled to the power amplifier;
- a second transformer coil adapted to be electromagnetically coupled to the first transformer coil;
- a first bond wire coupled to a first end of the second transformer coil and adapted to be coupled to a first end of an antenna;
- a first leg including a capacitor coupled to a second end of the second transformer coil, a first switch coupled in series with the capacitor, and a second bond wire coupled in series to the first switch, the second bond wire adapted to be coupled to a second end of the antenna;
- and
- a second leg coupled in parallel with the first leg, the second leg including a second switch coupled to the second end of the second transformer coil and to the capacitor and a third bond wire coupled in series to the second switch, the third bond wire adapted to be coupled to the second end of the antenna.
A device, comprising:
- a transmitter, including:
- a power amplifier;
- a first transformer coil coupled to the power amplifier;
- a second transformer coil adapted to be electromagnetically coupled to the first transformer coil;
- a capacitor coupled to the second transformer coil;
- a first transistor coupled in series with the capacitor;
- a first bond wire coupled to the first transistor;
- a second transistor coupled to the second transformer coil and the capacitor;
- and
- a second bond wire coupled to the second transistor;
- and
- a controller coupled to the transmitter, the controller configured to:
- turn on the first transistor and turn off the second transistor to enact a first power mode in which the capacitor is engaged with the second bond wire, and wherein, in the first power mode, the transmitter is configured to transmit signals at a first maximum power level that is based on a capacitance of the capacitor;
- and
- turn off the first transistor and turn on the second transistor to enact a second power mode in which the capacitor is disengaged from the second bond wire, and wherein, in the second power mode, the transmitter is configured to transmit signals at a second maximum power level that is less than the first maximum power level.
Dependencies are inferred from the claim text.