A wideband CMOS variable gain low noise amplifier based on single-to-differential stage for TV tuner applications

A wideband CMOS variable gain low noise amplifier (VGLNA) used for TV tuner is presented. A single-to-differential (S2D) circuit other than an off-chip balun is applied for high gain mode and a resistive attenuator is for five steps (6 dB per step) attenuation in low gain mode. The performance of S2D, especially the noise factor is analyzed. The chip is implemented in a 0.18-mum 1P6M mixed-signal CMOS process. Measurements show that in the 50-860 MHz frequency range, the VGLNA achieves 15 dB maximum gain, 31 dB variable gain range, a minimum 3.8 dB noise figure and 2.6 dBm 11P3 at 15 dB gain while consumes 5.7 mA from a 1.8 V supply.

[1]  Bonkee Kim,et al.  A 13-dB IIP3 improved low-power CMOS RF programmable gain amplifier using differential circuit transconductance linearization for various terrestrial mobile D-TV applications , 2006 .

[2]  B. Nauta,et al.  Wideband Balun-LNA With Simultaneous Output Balancing, Noise-Canceling and Distortion-Canceling , 2008, IEEE Journal of Solid-State Circuits.

[3]  José Silva-Martínez,et al.  A High Dynamic Range CMOS Variable Gain Amplifier for Mobile DTV Tuner , 2007, IEEE Journal of Solid-State Circuits.

[4]  Hao Min,et al.  A CMOS wide-band low-noise amplifier with balun-based noise-canceling technique , 2007, 2007 IEEE Asian Solid-State Circuits Conference.

[5]  Eric A. M. Klumperink,et al.  Generating all two-MOS-transistor amplifiers leads to new wide-band LNAs , 2000, IEEE J. Solid State Circuits.

[6]  Behzad Razavi,et al.  Design of Analog CMOS Integrated Circuits , 1999 .

[7]  M. Koutani,et al.  A digital terrestrial television (ISDB-T) tuner for mobile applications , 2004, 2004 IEEE International Solid-State Circuits Conference (IEEE Cat. No.04CH37519).

[8]  J. Caldwell,et al.  A CMOS broadband tuner IC , 2002, 2002 IEEE International Solid-State Circuits Conference. Digest of Technical Papers (Cat. No.02CH37315).