| Autor: |
Hori, Shinichi, Wentzel, Andreas, Hayakawa, Makoto, Heinrich, Wolfgang, Kunihiro, Kazuaki |
| Zdroj: |
2012 IEEE Compound Semiconductor Integrated Circuit Symposium (CSICS); 1/ 1/2012, p1-4, 4p |
| Abstrakt: |
A single-bit high efficiency watt-class digital transmitter for the 450 MHz band is presented, using a GaN voltage-mode class-S power amplifier and a CMOS envelope ΔΣ modulator. The transmitter achieves 1.1 W output power with 69% drain efficiency for a 400 MHz WCDMA uplink signal, thus meeting the 3GPP specifications for ACLR. A power control from 0.45 W to 1.8 W is achieved by changing the supply voltage of the power amplifier from 20 V to 40 V, keeping the drain efficiency beyond 58% without any degradation of ACLR. [ABSTRACT FROM PUBLISHER] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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