VLSI symposium, Date: 2011/06/01 - 2011/06/01
Publication date:
2011-06-01
Pages:
26 -
27
ISSN:
9784863481657
VLSI symposium
Author:
Ravi, Ashoke
Madoglio, Paolo ; Verhelst, Marian ; Sajadieh, Masoud ; Aguirre, Mariano ; Xu, Hongtao ; Pellerano, Stefano ; Lomeli, I ; Zarate, J ; Cuellar, Luis ; Degani, Ofir ; Lakdawala, Hasnain ; Soumyanath, K ; Palaskas, Yorgos
Abstract:
A 2.5 GHz delay-based CMOS outphasing transmitter for wideband OFDM is presented in 45nm LP CMOS. It dynamically delays LO edges to modulate the phase of two outphasing signals. A Tapped-Delay-Line coarse delay modulator allows delay modulation at the LO rate with no glitches. This is used to implement a 11-bit ΣΔ-dithered θ modulator with phase-domain filtering, and a 9-bit open-loop φ modulator. The system meets EVM and ACPR requirements for 802.11g at 2.5GHz. © 2011 JSAP (Japan Society of Applied Physi.