SUPPLY TRANSITIONS IN AN ENVELOPE TRACKED POWER AMPLIFIER
摘要
A method and system controls a transition between utilizing an envelope tracking (ET) mechanism and using an average power tracking (APT) mechanism to provide power to a power amplifier. A power amplifier controller (PAC) initiates an ET mechanism to track changes in amplitudes of a radio frequency (RF) signal being received by the power amplifier. If the PAC determines that the RF signal bandwidth is low and the average amplitude is at least equal to a threshold value, the PAC maintains the ET mechanism. If the RF signal bandwidth is high and/or the average amplitude of the RF signal is less than the threshold value, the PAC temporarily deactivates the ET mechanism and controls a transition to utilizing the APT mechanism by properly synchronizing the transition to the change in average signal amplitude levels so there are no undesired transients affecting signal quality or spectrum.
申请公布号
EP2920877(A1)
申请公布日期
2015.09.23
申请号
EP20130795628
申请日期
2013.11.04
申请人
MOTOROLA MOBILITY LLC
发明人
SCHWENT, DALE, G.;BLACK, GREGORY, R.;GOEDKEN, RYAN, J.;KLOMSDORF, ARMIN, W.