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Other Niche and Emerging Applications

T13.7 - Fully Integrated 4-Level Supply Modulator for Digital Envelope Tracking

Wednesday, March 25, 2026
11:00 AM - 11:20 AM CT
Location: 217A
This paper presents a fully integrated 4-level Supply Modulator IC (SMIC) for digital envelope tracking (ET) in 6G wireless communications. Implemented in a 130-nm BCD process, the proposed SMIC includes a Switched-Capacitor Voltage Divider (SCVD) and a novel Level Selection Switch (LSSW) to generate four voltage levels (30 V, 36 V, 42 V, and 48 V) from two external supplies. A new switching scheme with independently controlled reverse switches is introduced to prevent voltage degradation during switching dead times. The fabricated chip occupies an area of 7.0 mm × 3.5 mm and achieves up to 98.9% efficiency at 1 MHz switching frequency with an average output power of 32.0 W. The proposed SMIC offers a compact and efficient solution for ET-based power amplifier systems in 5G/6G MIMO base stations.