Details

Autor(en) / Beteiligte

• Wen Yuan
• Aparin, Vladimir
• Dunworth, Jeremy
• Seward, Lee
• Walling, Jeffrey S.

Titel

A Quadrature Switched Capacitor Power Amplifier

Ist Teil von

• IEEE journal of solid-state circuits, 2016-05, Vol.51 (5), p.1200-1209

Ort / Verlag

New York: IEEE

Erscheinungsjahr

2016

Link zum Volltext

• IEEE_Xplore

Quelle

IEEE/IET Electronic Library (IEL)

Beschreibungen/Notizen

• This paper presents an all-digital class-G quadrature switched-capacitor power amplifier (Q-SCPA) implemented in 65 nm CMOS. It combines in-phase (I) and quadrature (Q) signals on a shared capacitor array. The I/Q signals are digitally weighted and combined in the charge domain. Quadrature summation results in a 3 dB signal loss; Hence the Q-SCPA utilizes a class-G dual-supply architecture to improve efficiency at backoff. Unlike polar/EER counterparts, the Q-SCPA requires no wideband phase modulator or delay matching circuitry. The Q-SCPA delivers a peak output power of 20.5 dBm with a peak PAE of 20%. It is measured with a 10 MHz, 64 QAM LTE signal, and achieves an ACLR of <;-30 dBc, with an EVM <; 4%-rms.