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A CMOS IF transceiver with 90 dB linear control VGA for IMT-2000 application

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5 Author(s)
Yonk-Sik Youn ; Electron. & Telecommun. Res. Inst., Daejeon, South Korea ; Jang-Hong Choi ; Min-Hyung Cho ; Seon-Ho Han
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A prototype IF transceiver has been integrated in 0.35 /spl mu/m CMOS technology. The chip includes VGAs and mixers for IMT-2000. The VGAs are controlled continuously in linear dB by using a proposed quasi-exponential gain control method. Measurements show that both VGAs have over 90 dB dynamic range and 9.5 dB NF in receiver. The -3 dB frequencies of the receiver and transmitter are 250 MHz and 430 MHz, respectively. Thus, the transceiver can adapt to PCS as well as IMT-2000 for potential dual-band application. With a single 3.0 V power supply, the VGAs and mixers consume 16 mA and 6 mA, respectively.

Published in:

VLSI Circuits, 2003. Digest of Technical Papers. 2003 Symposium on

Date of Conference:

12-14 June 2003