Invention Grant
- Patent Title: Output impedance compensation of a pseudo-envelope follower power management system
- Patent Title (中): 伪包络跟随器电源管理系统的输出阻抗补偿
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Application No.: US14151167Application Date: 2014-01-09
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Publication No.: US09401678B2Publication Date: 2016-07-26
- Inventor: Michael R. Kay , Nadim Khlat
- Applicant: RF Micro Devices, Inc.
- Applicant Address: US NC Greensboro
- Assignee: RF Micro Devices, Inc.
- Current Assignee: RF Micro Devices, Inc.
- Current Assignee Address: US NC Greensboro
- Agency: Withrow & Terranova, P.L.L.C.
- Main IPC: H03F3/04
- IPC: H03F3/04 ; H03G3/00 ; H03F1/02 ; H02M3/07 ; H03F1/42 ; H03F3/195 ; H03F3/24 ; H03F3/30 ; H03F3/45 ; H03F3/50 ; H03F3/72
Abstract:
A switch mode power supply converter, a parallel amplifier, and a parallel amplifier output impedance compensation circuit are disclosed. The switch mode power supply converter provides a switching voltage and generates an estimated switching voltage output, which is indicative of the switching voltage. The parallel amplifier generates a power amplifier supply voltage at a power amplifier supply output based on a combination of a VRAMP signal and a high frequency ripple compensation signal. The parallel amplifier output impedance compensation circuit provides the high frequency ripple compensation signal based on a difference between the VRAMP signal and the estimated switching voltage output.
Public/Granted literature
- US20140125408A1 OUTPUT IMPEDANCE COMPENSATION OF A PSEUDO-ENVELOPE FOLLOWER POWER MANAGEMENT SYSTEM Public/Granted day:2014-05-08
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