IMECAS/ESIC, Beijing, P.R.China

---

Abstract—A VHF (30MHz-300MHz) band digitally programmable low noise amplifier (LNA) has been implemented with a 0.25um standard CMOS process for VHF CMMB mobile TV tuners. Utilizing a T-match input network, input matching of more than a decade bandwidth is achieved across all gain settings. Adopting the multiple gated technique, gain flatness enhancement and capacitor reuse etc., the proposed LNA demonstrates 3 gain settings of 20dB, 6dB, -9dB with S11 below -12dB at every gain setting. At a power supply voltage of 2.5V, the LNA consumes less than 10mA current, -6dBm IIP3 and a Noise Figure (NF) of less than 2.9dB at 20dB gain setting over the VHF band.

Index Terms—LNA (Low Noise Amplifier), broadband, VHF (Very High Frequency) band, CMMB(China Mobile Multimedia Broadcasting), MTV (Mobile TV), multiple gated technique, gain flatness enhancement

[PDF]

Cite: Xu Cheng, Guiliang Guo, Yuepeng Yan, "A High Linearity VHF Programmable Gain LNA," Journal of Computers vol. 8, no. 11, pp. 3144-3151, 2013.