43dB ACR低通滤波器，自动调谐，用于低中频转换DAB/T-DMB调谐器IC

Proceedings of the 31st European Solid-State Circuits Conference, 2005. ESSCIRC 2005. Pub Date : 2005-12-05 DOI:10.1109/ESSCIR.2005.1541624

Seyeob Kim, Bonkee Kim, M. Jeong, Jung-Hwan Lee, Youngho Cho, Tae Wook Kim, Boeun Kim

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引用次数: 17

摘要

本文为低中频转换数字音频广播(DAB)和地面数字多媒体广播(T-DMB)调谐器集成电路提供了一种带自动截止频率调谐电路的通道选择低通滤波器，该滤波器在1.9MHz和2.4MHz时分别具有1.58MHz截止频率和20dB和65dB的阻带衰减。在1.7MHz频偏下，490mVpp的带内IIP3为-8.4dBV，可满足1dB的脱敏。采用简单的自动调谐技术，可获得+/-1.5%以下的截止频率误差和40dB以上的相邻信道抑制(ACR)。低通滤波器采用0.18/spl mu/m CMOS工艺制作，功耗约4.5mA，电源为1.8V。

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A 43dB ACR low-pass filter with automatic tuning for low-IF conversion DAB/T-DMB tuner IC

This paper provides a channel select low-pass filter with automatic cut-off frequency tuning circuit for low-IF conversion digital audio broadcasting (DAB) and terrestrial-digital multimedia broadcasting (T-DMB) tuner IC. This filter has 1.58MHz cut-off frequency, 20dB and 65dB stop band attenuation at 1.9MHz and 2.4MHz, respectively. The in-band IIP3 is -8.4dBV and 1dB desensitization is satisfied for 490mVpp interferer at 1.7MHz frequency offset. By using simple automatic tuning technique, less than +/-1.5% cut-off frequency error and more than 40dB adjacent channel rejection (ACR) are obtained. The low-pass filter is fabricated in 0.18/spl mu/m CMOS technology and consumes about 4.5mA with 1.8V power supply.

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Proceedings of the 31st European Solid-State Circuits Conference, 2005. ESSCIRC 2005.

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