Invention Application
- Patent Title: ENVELOPE TRACKING WITH REDUCED CIRCUIT AREA AND POWER CONSUMPTION
- Patent Title (中): 具有减少电路面积和功耗的包络跟踪
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Application No.: US14959954Application Date: 2015-12-04
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Publication No.: US20160164551A1Publication Date: 2016-06-09
- Inventor: Nadim Khlat , Michael R. Kay
- Applicant: RF Micro Devices, Inc.
- Main IPC: H04B1/04
- IPC: H04B1/04 ; H03F1/02 ; H03F3/21 ; H03F3/19

Abstract:
The present disclosure relates to envelope tracking with reduced circuit area and power consumption. In one embodiment, an envelope power converter includes a switching power converter configured to receive a supply voltage and provide an output based on a switching control signal. A holding inductor is coupled between the switching power converter and envelope power supply output node. An offset capacitor is coupled between the envelope power supply output node and control node. In response to a target envelope power supply output voltage, a control circuit is configured to generate the switching control signal and a control voltage to maintain envelope power supply signal at target voltage level. The control circuit is configured to generate switching control signal and control voltage such that supply voltage is provided by switching power converter to holding inductor and offset capacitor is charged to target level without changing voltage of envelope power supply signal.
Public/Granted literature
- US09634620B2 Envelope tracking with reduced circuit area and power consumption Public/Granted day:2017-04-25
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