Method and apparatus for tuning and compensating power levels in a radio telephone
AssigneeNokia Mobile Phones Ltd.
InventorRisto Vaisanen
Life of this patent
Estimating the term…
Abstract
In a method and apparatus according to the invention the tuning information determined by a measuring computer (20) is stored in the memory of the radio telephone (1). When the radio telephone is in operation the microprocessor (10) receives from the sensors (14) information e.g. about the temperature, and it selects from its memory tuning information, with which the transmitter (11) power is controlled via a D/A-converter (15). The tuning can be made automatically, without opening the casing of the radio telephone.
Claims7
A method useful for tuning power levels in a radio telephone having a transmitter and a logic section which controls operation, the method comprising the steps of:
- supplying a power level from the transmitter to an antenna interface;
- sensing the power level with an external tuning sensor connected to the antenna interface and through an auxiliary interface to the logic section;
- adjusting the power level in a feed-back loop via the logic section based on the sensed power level until a desired tuning result is achieved;
- storing the desired tuning result for the radio telephone as a compensating value in a non-volatile memory within the logic section;
- and
- controlling a power level of the transmitter via a digital analog converter according to the desired tuning result stored in the logic section when the radio telephone is operating.
An apparatus useful for tuning power levels in a radio telephone having a transmitter and a logic section which controls operation, comprising:
- means for supplying a power level from the transmitter to an antenna interface;
- means for sensing the power level with an external tuning sensor connected to the antenna interface and through an auxiliary interface to the logic section;
- means for adjusting the power level in a feed-back loop via the logic section based on the sensed power level until a desired tuning result is achieved;
- means for storing the desired tuning result for the radio telephone as a compensating value in a non-volatile memory within the logic section;
- and
- means for controlling a power level of the transmitter via a digital analog converter according to the desired tuning result stored in the logic section when the radio telephone is operating.
Dependencies are inferred from the claim text.