Invention Grant
- Patent Title: Dynamic headroom for envelope tracking
- Patent Title (中): 用于信封跟踪的动态余量
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Application No.: US13752287Application Date: 2013-01-28
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Publication No.: US08866547B2Publication Date: 2014-10-21
- Inventor: Lennart Karl-Axel Mathe , Pengfei Li , Song S Shi , Yunfei Shi , Joseph D Rutkowski
- Applicant: QUALCOMM Incorporated
- Applicant Address: US CA San Diego
- Assignee: QUALCOMM Incorporated
- Current Assignee: QUALCOMM Incorporated
- Current Assignee Address: US CA San Diego
- Agency: Arent Fox LLP
- Main IPC: H03F99/00
- IPC: H03F99/00 ; H03G1/00

Abstract:
Techniques for dynamically generating a headroom voltage for an envelope tracking system. In an aspect, an initial headroom voltage is updated when a signal from a power amplifier (PA) indicates that the PA headroom is insufficient. The initial headroom voltage may be updated to an operating headroom voltage that includes the initial voltage plus a deficiency voltage plus a margin. In this manner, the operating headroom voltage may be dynamically selected to minimize power consumption while still ensuring that the PA is linear. In a further aspect, a specific exemplary embodiment of a headroom voltage generator using a counter is described.
Public/Granted literature
- US20140210559A1 DYNAMIC HEADROOM FOR ENVELOPE TRACKING Public/Granted day:2014-07-31
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