Envelope-Tracking Supply Modulator with Trellis Search-Based Switching and 160MHz Capability

Weiyu Leng,Asad Abidi,Sraavan Mundlapudi,Hooman Darabi,Debopriyo Chowdhury,Ali Afsahi,Sida Li

2021 IEEE Custom Integrated Circuits Conference (CICC)（2021）

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摘要

Envelope tracking (ET) is in wide use to raise the efficiencies of PAs. We report on the realization of a new envelope-tracking supply modulator (ETSM). A hybrid amplifier (HA) is commonly used, which, in effect, partitions the envelope bandwidth into a low and high subband. An efficient switching buck converter tracks the low band that contains most of the load current. In parallel, an op amp wit...

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关键词

Operational amplifiers,Application specific integrated circuits,Buck converters,Baseband,Conferences,Modulation,Switches

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