Abstract: A method and a system, the system includes: an analog base-band pre-distorter arranged to receive in-phase (I) baseband signals and Quadrature (Q) baseband signals, and to amplify the I baseband signals and the Q baseband signals by a gain function to provide amplified I baseband signals and amplified Q baseband signals; wherein the gain function is responsive to a sum of (a) a square of amplitudes of the I baseband signals and, (b) a square of amplitudes of the B baseband signals; a frequency converter arranged to convert the amplified I and Q baseband signals to radio frequency (RF) signals; an RF amplifier that is arranged to amplify the RF signals to provide amplified RF signals and to output differential RF signals that represent the amplified RF signals through first and second differential output ports of the RF amplifier; a balun comprising a first and second balanced input ports and a single unbalanced output port; and multiple wire-bonds coupled between the balun and the first and second differentia

Abstract: Briefly, a method an apparatus to control a power of a transmitter during received slot duration is provided. A power control module set the transmitter to transmit in a targeted power level base on a command received from the slot. The power control module may set an input signal to a first level and may gradually vary the level of the input signal to be substantially equal to its original level and to adjust a gain of the transmitter to transmit at the targeted power level.

Abstract: Briefly, an apparatus having a first capacitor-inductor-capacitor impedance converter operably coupled to a second capacitor-inductor-capacitor impedance converter. The first and second capacitor-inductor-capacitor impedance converter may combine a first and second signals of first and second outphasing power amplifiers and may provide a matched output impedance to a desired load.

Abstract: Briefly, an apparatus having an outphasing modulator that may provide at least first and second outphased signals to a power amplifier. The outphasing modulator may control amplitude of the first and second outphased signals by an amplitude modulation controller which may vary an amplitude level of first and second control signals base on a desired output power level of said power amplifier.

Abstract: Briefly, an apparatus having an outphasing modulator that may provide at least first and second outphased signals to a power amplifier. The outphasing modulator may control amplitude of the first and second outphased signals by an amplitude modulation controller which may vary an amplitude level of first and second control signals base on a desired output power level of said power amplifier.

Abstract: Briefly, an apparatus having a first capacitor-inductor-capacitor impedance converter operably coupled to a second capacitor-inductor-capacitor impedance converter. The first and second capacitor-inductor-capacitor impedance converter may combine a first and second signals of first and second outphasing power amplifiers and may provide a matched output impedance to a desired load.

Abstract: A cellular telephone utilizing a variable power voltage control oscillator that may achieve a high dynamic range in output power is disclosed. In some embodiments, a microprocessor may be provided to adjust the amplitude of the variable power voltage control oscillator in response to transmitted commands that may be received.

Abstract: Briefly, a method an apparatus to control a power of a transmitter during received slot duration is provided. A power control module set the transmitter to transmit in a targeted power level base on a command received from the slot. The power control module may set an input signal to a first level and may gradually vary the level of the input signal to be substantially equal to its original level and to adjust a gain of the transmitter to transmit at the targeted power level.

Abstract: Apparatus and a method for fast attack automatic gain control (AGC) loop for narrow band systems in which RF signals are received in discontinuous bursts, such as TETRA systems in a direct mode of operation (DMO). The loop includes a feedback loop with a predetermined non-linear response to an input signal. The method includes the steps of opening the AGC loop (250), setting a gain for the signal path of the AGC loop to a predetermined level (252), closing the AGC loop (254) and commencing a steady-state mode of operation (258).

Abstract: Briefly, in accordance with one embodiment of the invention, a method of predicting zero crossing of a signal and deflecting the signal from an origin of a complex trajectory plane.