Title :
A 1 GHz-band low distortion up-converter with a linear in dB control VGA for digital TV tuner
Author :
Yong-Sik Youn ; Cheon-Soo Kim ; Nam-Soo Kim ; Hyun-Kyu Yu
Author_Institution :
Electron. & Telecommun. Res. Inst., Taejon, South Korea
Abstract :
A new exponential controlled variable gain amplifier (VGA) and an up-mixer have been integrated in a single chip using 0.35 /spl mu/m CMOS process. The gain of the VGA is controlled analog-linear in dB by using proposed a multi-stage multi-control R-r ladder structure to cover the wide gain control range. Up-converter shows a low distorted IF output signal over the wide RF input signal range of 50 MHz/spl sim/810 MHz for digital TV tuner. Measurements show that the gain control range of VGA is -48/spl sim/0 dB and the IIP3 of the overall up-converter is 27/spl sim/1 dBm, respectively. In addition, -3 dB frequency is measured to 1 GHz. The chip consumes 10 mA with a single 3.3 V power supply.
Keywords :
CMOS analogue integrated circuits; UHF frequency convertors; UHF integrated circuits; UHF mixers; digital television; gain control; ladder networks; tuning; 0.35 micron; 1 GHz; 10 mA; 3.3 V; CMOS single chip; IF signal; IIP3; RF signal; analog linear control; digital TV tuner; distortion; exponential control; gain control; multi-stage multi-control R-r ladder structure; up-converter; up-mixer; variable gain amplifier; CMOS process; Digital TV; Distortion measurement; Frequency measurement; Gain control; Gain measurement; RF signals; Radio frequency; Semiconductor device measurement; Tuners;
Conference_Titel :
Radio Frequency Integrated Circuits (RFIC) Symposium, 2001. Digest of Papers. 2001 IEEE
Conference_Location :
Phoenix, AZ, USA
Print_ISBN :
0-7803-6601-8
DOI :
10.1109/RFIC.2001.936252
