A fully integrated direct-conversion digital satellite tuner in 0.18 μm CMOS

• Published in: Journal of semiconductors Vol. 32; no. 4; pp. 045004 - 1-5
• Main Authors: Chen, Si (斯陈), Yang, Zengwang (增汪 杨), Gu, Mingliang (明亮 顾)
• Format: Journal Article
• Language: English
• Published: IOP Publishing 01.04.2011
• Subjects: Chips; CMOS; Digital; Phase error; Satellites; Semiconductors; Synthesizers; Tuners
• ISSN: 1674-4926
• DOI: 10.1088/1674-4926/32/4/045004

A fully integrated direct-conversion digital satellite tuner for DVB-S/S2 and ABS-S applications is presented. A broadband noise-canceling Balun-LNA and passive quadrature mixers provided a high-linearity low noise RF front-end, while the synthesizer integrated the loop filter to reduce the solution cost and system debug time. Fabricated in 0.18 mu m CMOS, the chip achieves a less than 7.6 dB noise figure over a 900-2150 MHz L-band, while the measured sensitivity for 4.42 MS/s QPSK-3/4 mode is -91 dBm at the PCB connector. The fully integrated integer-N synthesizer operating from 2150 to 4350 MHz achieves less than 1 degree C integrated phase error. The chip consumes about 145 mA at a 3.3 V supply with internal integrated LDOs.