A 0.3-to-1.2GHz tunable 4th-order switched gm-C bandpass filter with >55dB ultimate rejection and out-of-band IIP3 of +29dBm


Share/Save/Bookmark

Darvishi, Milad and Zee, Ronan van der and Klumperink, Eric and Nauta, Bram (2012) A 0.3-to-1.2GHz tunable 4th-order switched gm-C bandpass filter with >55dB ultimate rejection and out-of-band IIP3 of +29dBm. In: IEEE International Solid-State Circuits Conference, ISSCC 2012, 19-23 February 2012, San Francisco, CA, USA (pp. pp. 358-360).

open access
[img]
Preview
PDF
1MB
Abstract:The trend towards reconfigurable receivers requires on-chip flexible filters that can replace dedicated, bulky and non-tunable filters (e.g., SAW and BAW [1]). Although BAW filters are compatible with silicon processes, their center frequency is sensitive to thickness variation of the piezoelectric material and the achievable tuneability is limited [1]. Other techniques to make RF on-chip band-pass filters (BPFs) include Q-enhancement, gm-C and N-path. Q-enhancement approach has several disadvantages such as large area due to inductors which do not obey process scaling, limited tuneability and poor dynamic range [2]. Main drawbacks of gm-C filters are the tradeoff between power consumption, quality factor, center frequency and dynamic range and the need for tuning circuitry [3]. Recently there has been renewed interest in the translational impedance conversion of N-path filters [4-6]. Due to the “transparency” of the passive mixer, baseband impedance is translated to frequencies around the clock frequency flo [7]. The interesting features of these filters are their direct tuneability with flo, higher quality factor compared to on-chip CMOS LC filters [2], high linearity and graceful scaling with process.
Item Type:Conference or Workshop Item
Copyright:© 2012 IEEE
Faculty:
Electrical Engineering, Mathematics and Computer Science (EEMCS)
Research Group:
Link to this item:http://purl.utwente.nl/publications/80302
Official URL:http://dx.doi.org/10.1109/ISSCC.2012.6177050
Export this item as:BibTeX
EndNote
HTML Citation
Reference Manager

 

Repository Staff Only: item control page