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US 7,609,781 B2Granted
Wireless communication device with self calibration feature for controlling power output
AssigneeST-Ericsson SA
InventorsDonald A. Kerth, Srinath Sridharan
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Abstract
A wireless communication device is disclosed which employs a minimal number of power calibrations to set the output power of the device to a specified output power level. In one embodiment, the disclosed communication device includes a self calibrating feature that sets the output power level during initialization of the device.
Claims29
A method of calibrating the gain of a transmitter, comprising:
- providing a ramp signal to a transmitter including first and second stages, the ramp signal exhibiting a predetermined value among a range of values;
- adjusting, by the first stage, a reference signal to exhibit a reference signal value that is approximately equal to the ramp signal predetermined value, the reference signal value and the ramp signal value controlling the gain of the first stage;
- and
- adjusting, by the second stage, power generated by the transmitter to a predetermined power level.
1 more element
A method of calibrating the gain of a transmitter, comprising:
- providing a ramp signal to a transmitter including first and second stages, the ramp signal exhibiting a predetermined value among a range of values;
- adjusting, by the first stage, a reference signal to exhibit a reference signal value that is approximately equal to the ramp signal predetermined value, the reference signal value and the ramp signal value controlling the gain of the first stage;
- adjusting, by the second stage, the gain of the second stage to determine a second stage gain value for which the transmitter generates output power equal to a predetermined power level;
- storing, in a memory, a word related to the second stage gain value;
- and
- retrieving, from the memory, the word for use in subsequent operation of the transmitter to set power output equal to the predetermined power level or a power level offset from the predetermined power level.
3 more elements
A wireless communication device comprising:
- a baseband section;
- and
- a transmitter section, coupled to the baseband section, the transmitter section including a first stage coupled to a second stage, the baseband section supplying a ramp signal to the first stage, the ramp signal exhibiting a predetermined value among a range of values;
- the first stage including a reference signal generator that generates a reference signal that is adjusted to exhibit a reference signal value that is approximately equal to the ramp signal predetermined value, the reference signal value and the ramp signal value controlling the gain of the first stage;
- the second stage exhibiting adjustable gain wherein the second stage determines a second stage gain value for which the device generates output power equal to a predetermined power level.
2 more elements
Dependencies are inferred from the claim text.