公开(公告)号：US08874050B1

公开(公告)日：2014-10-28

申请号：US12774155

申请日：2010-05-05

申请人： Alexander Wayne Hietala ,  Jeffery Peter Ortiz ,  Timothy Keith Coffman

发明人： Alexander Wayne Hietala ,  Jeffery Peter Ortiz ,  Timothy Keith Coffman

IPC分类号： H01Q11/12

CPC分类号： H01P5/184 ,  H03F1/0211 ,  H03F3/195 ,  H03F3/24 ,  H03F3/68 ,  H03F2200/541 ,  H03H7/38

摘要： A circuit and method for a saturation correction of a power amplifier (PA) is provided in order to maintain a desirable switching spectrum. The circuit includes a closed loop system that is responsive to a dynamic PA control signal known as VRAMP. The method samples a detector voltage that represents the output of the PA at the maximum voltage level of VRAMP. The sampled detector voltage is then reduced by a predetermined amount and applied as a fixed voltage PA control signal in the place of VRAMP. As a result, the closed loop system responds to the fixed voltage PA control signal to bring the PA out of saturation before VRAMP can begin a voltage decrease. Once the VRAMP voltage decreases, VRAMP is reapplied as a dynamic PA control signal in place of the fixed voltage control signal.

摘要翻译： 提供了用于功率放大器（PA）的饱和校正的电路和方法，以便保持期望的开关频谱。 电路包括响应于称为VRAMP的动态PA控制信号的闭环系统。 该方法对在VRAMP的最大电压电平下表示PA输出的检测器电压进行采样。 然后将取样的检测器电压减小预定量并作为固定电压PA控制信号施加在VRAMP的位置。 结果，闭环系统响应于固定电压PA控制信号，使得在VRAMP可以开始降压之前使PA失去饱和。 一旦VRAMP电压降低，VRAMP将重新应用为动态PA控制信号，代替固定电压控制信号。