作者: Aarno Parssinen , Petri Eloranta , Pauli Seppinen , Sami Kallioinen , Tuomas Saarela
关键词: Engineering 、 Modulation 、 Electrical engineering 、 Electronic engineering 、 CMOS 、 dBc 、 Power control 、 Sideband 、 Amplifier 、 Noise floor 、 RF modulator
摘要: This paper presents a system-independent transmitter architecture based on direct-digital RF-modulator which combines the D/A conversion, up-conversion, unwanted sideband rejection, power control, and part of digital image-rejection filtering into single mixed-signal circuit block. The multimode capability is demonstrated with WCDMA, EDGE, WLAN system requirements. modulator achieves 90 dB control range an external amplifier module, WCDMA EVM less than 2% from signal powers -20 dBm to +25 dBm. noise floor level defined by quantization at 190 MHz offset carrier -150 dBc/Hz measured output PA power. analog consumption maximum 92 mW scales down 46 when reducing -43 dBFS. 65 mW. chip implemented standard 0.13 mum 1.2 V CMOS total silicon area 4 mm2.