2-4 GHz Q-Tunable LC Bandpass Filter with 172-dB∙Hz Peak Dynamic Range, Resilient to +15-dBm Out-of-Band Blocker 

 

Speaker: Laya Mohammadi  

Host: MICS

Date: September 25 (Friday), 2015
Time: 2:30 PM - 3:30 PM
Location: Whittemore 654 (6th Floor Conference Room)

Abstract:

This paper presents a new Q-enhancement LC bandpass filter capable of 2.25~4.5 GHz frequency tuning range with independent Q control from 3 to 150. The BPF adopts both current-mode and voltage-mode drivers for more flexible operation in the intractable noise-linearity tradeoff space. A dual varactor inverse (DVI) control method is proposed to suppress varactor nonlinearity. Also, the BPF employs a dynamic negative resistance circuit that introduces a gain peaking when the filter output reaches 1-dB gain compression point, extending the P-1dB input power and therefore increasing the high power handling capability. The circuit is implemented in a 0.13 um SiGe BiCMOS process. Measurement results show 9~-8 dBm of maximum IP-1dB, 10~18.5 dB of minimum NF, resulting in 146.5-172 dB∙Hz of normalized dynamic range when Q varies from 3 to 150 at fc=3.25 GHz. The BPF consumes 13-20 mA from 3.3 V supply. Chip size is 0.7×0.68 mm2. 

 

Bio:

Laya Mohammadi received the B.S. degree in electrical engineering from Razi University, Kermanshah, Iran, in 2008 and the M.S. degree from Tarbiat-Modares University, Tehran, Iran, in 2011. She joined Virginia Tech in 2012. Currently, she is working on integrated RF, analog and microwave filters and interference rejection systems. Ms. Mohammadi received the IEEE IMS best student paper award (second place) in 2015.