发明授权
US08874050B1 Saturation correction without using saturation detection and saturation prevention for a power amplifier
有权
饱和度校正，无需对功率放大器进行饱和检测和饱和度预防
- 专利标题： Saturation correction without using saturation detection and saturation prevention for a power amplifier
- 专利标题（中）： 饱和度校正，无需对功率放大器进行饱和检测和饱和度预防
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申请号： US12774155申请日： 2010-05-05
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公开(公告)号： US08874050B1公开(公告)日： 2014-10-28
- 发明人: Alexander Wayne Hietala , Jeffery Peter Ortiz , Timothy Keith Coffman
- 申请人： Alexander Wayne Hietala , Jeffery Peter Ortiz , Timothy Keith Coffman
- 申请人地址： US NC Greensboro
- 专利权人： RF Micro Devices, Inc.
- 当前专利权人： RF Micro Devices, Inc.
- 当前专利权人地址： US NC Greensboro
- 代理机构： Withrow & Terranova, P.L.L.C.
- 主分类号： H01Q11/12
- IPC分类号： H01Q11/12
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.
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