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US 8,693,961 B2Granted
System and method for improving power efficiency of a transmitter
AssigneeIntel IP Corporation
InventorsOmid Oliaei, David Newman, Mark Kirschenmann
Life of this patent
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Abstract
In accordance with some embodiments of the present disclosure, a circuit comprises a balun configured to receive a radio frequency (RF) signal at a first input port and a second input port of an input coil. The balun is further configured to output the RF signal at an output coil communicatively coupled to the input coil. The circuit also comprises a supply voltage selector circuit coupled to the input coil and configured to adjust a bias voltage at the input coil according to a power level of the RF signal received at the input coil.
Claims18
A circuit comprising:
- a balun configured to receive a radio frequency (RF) signal at a first input port and a second input port of an input coil and configured to output the RF signal at an output coil communicatively coupled to the input coil;
- a supply voltage selector circuit coupled to the input coil and configured to adjust a bias voltage at the input coil according to a power level of the RF signal received at the input coil;
- a mixer with an output coupled to the input coil of the balun and configured to modulate a data signal onto a carrier signal to generate the RF signal and communicate the RF signal from the output of the mixer to the input coil of the balun;
- and
- a current source coupled at the output of the mixer and configured to source current to the mixer to at least partially bypass an internal resistance between the output of the mixer and the input coil of the balun to reduce power consumption associated with the internal resistance.
2 more elements
A circuit comprising:
- a balun configured to receive a radio frequency (RF) signal at a first input port and a second input port of an input coil and configured to output the RF signal at an output coil communicatively coupled to the input coil;
- a supply voltage selector circuit coupled to the input coil and configured to adjust a bias voltage at the input coil according to a power level of the RF signal received at the input coil;
- a mixer with an output coupled to the input coil of the balun and configured to modulate a data signal onto a carrier signal to generate the RF signal and communicate the RF signal from the output of the mixer to the input coil of the balun;
- a voltage to current (V-I) converter coupled at an output of the V-I converter to an input of the mixer and configured to convert the data signal from a voltage data signal to a current data signal and communicate the current data signal from the output of the V-I converter to the input of the mixer;
- and
- a current source coupled at the output of the V-I converter and configured to source current to the V-I converter to at least partially bypass an internal resistance between the output of the V-I converter and the input of the mixer to reduce power consumption associated with the internal resistance.
3 more elements
A method comprising:
- modulating, by a mixer, a data signal onto a carrier signal to generate a radio frequency (RF) signal;
- receiving the RF signal from an output of the mixer at a first input port and a second input port of an input coil of a balun;
- outputting the RF signal at an output coil of the balun communicatively coupled to the input coil of the balun;
- adjusting a bias voltage at the input coil according to a power level of the RF signal received at the input coil;
- and
- sourcing current to the mixer at the output of the mixer to at least partially bypass an internal resistance between the output of the mixer and the input coil of the balun to reduce power consumption associated with the internal resistance.
3 more elements
A method comprising:
- converting, by a voltage to current (V-I) converter, a data signal from a voltage data signal to a current data signal;
- communicating the current data signal from an output of the V-I converter to an input of a mixer;
- modulating, by the mixer, the data signal onto a carrier signal to generate a radio frequency (RF) signal;
- receiving the RF signal from an output of the mixer at a first input port and a second input port of an input coil of a balun;
- outputting the RF signal at an output coil of the balun communicatively coupled to the input coil of the balun;
- adjusting a bias voltage at the input coil according to a power level of the RF signal received at the input coil;
- and
- sourcing current to the V-I converter at the output of the V-I converter to at least partially bypass an internal resistance between the output of the V-I converter and the input of the mixer to reduce power consumption associated with the internal resistance.
5 more elements
Dependencies are inferred from the claim text.