Abstract: A system and method are disclosed for controlling transmitter output levels in a wireless communications device. The system comprises: a transmitter configured to accept an adjusted transmit bias control value and to supply a transmitter output level in response to the adjusted transmit bias control value; and a gain control circuit configured to supply the adjusted transmit bias control value in response to a transmitter output measurement and to a reference.

Abstract: A system and method are disclosed for controlling transmitter output levels in a wireless communications device. The system comprises: a transmitter configured to accept an adjusted transmit bias control value and to supply a transmitter output level in response to the adjusted transmit bias control value; and a gain control circuit configured to supply the adjusted transmit bias control value in response to a transmitter output measurement and to a reference.

Abstract: A system and method are provided for controlling transmitter output levels in a wireless communications device. The method comprises: maintaining a table of initial transmit bias control values cross-referenced to transmitter output levels; selecting transmitter output levels; supplying an initial transmit bias control value from the table corresponding to a selected transmitter output level; generating an initial transmitter output level; measuring the transmitter output level; creating an adjusted transmit bias control value in response to the measured transmitter output level, and to a reference value; using the difference between the initial transmit bias control value and the corresponding adjusted transmit bias control value to create an error value; saving the error value; and adding the error value to a subsequent initial transmit bias control value.

Abstract: A system and method are provided for controlling transmitter output levels in a wireless communications device. The method comprises: maintaining a table of initial transmit bias control values cross-referenced to transmitter output levels; selecting transmitter output levels; supplying an initial transmit bias control value from the table corresponding to a selected transmitter output level; generating an initial transmitter output level; measuring the transmitter output level; creating an adjusted transmit bias control value in response to the measured transmitter output level, and to a reference value; using the difference between the initial transmit bias control value and the corresponding adjusted transmit bias control value to create an error value; saving the error value; and adding the error value to a subsequent initial transmit bias control value.

Abstract: A dual band cellular telephone includes an antenna, a power amplifier, RF transmission and reception chains, first and second local oscillators, and IF transmission and reception chains. In order to select an intermediate frequency, processing circuitry within the telephone determines center frequencies of transmission radio frequency sweep ranges of first and second bands, calculates a difference between the center frequencies of the first and second transmission bands, and multiplies the calculated difference value by a scaling coefficient to calculate a center local oscillating frequency associated with one of the RF transmission bands. It then subtracts the transmission center frequency of one of the RF transmission bands from the local oscillator center frequency to determine the transmission intermediate frequency. Preferably, the cellular telephone has a single local oscillator for transmit and a single local oscillator for receive.