Fully-differential second-order tunable bandstop filter based on source follower

Fully-differential second-order tunable bandstop filter based on source follower

For access to this article, please select a purchase option:

Buy article PDF
(plus tax if applicable)
Buy Knowledge Pack
10 articles for £75.00
(plus taxes if applicable)

IET members benefit from discounts to all IET publications and free access to E&T Magazine. If you are an IET member, log in to your account and the discounts will automatically be applied.

Learn more about IET membership 

Recommend Title Publication to library

You must fill out fields marked with: *

Librarian details
Your details
Why are you recommending this title?
Select reason:
Electronics Letters — Recommend this title to your library

Thank you

Your recommendation has been sent to your librarian.

A new design method for a second-order bandstop filter is presented. The proposed filter is based on the source follower configuration with a partial positive feedback. The positive feedback is used to increase the quality factor of the filter, and the feed-forward paths are used to create complex zeros. The proposed bandstop filter has electronically tunable centre frequency, bandwidth and attenuation with low power consumption. The proposed design has been simulated in TSMC 180 nm CMOS technology. The filter achieves input-referred noise density. For a 2 GHz input signal, the filter achieves a signal-to-noise ratio of 60 dB for 238 input signal amplitude. The simulated results show that the centre frequency tuning range is between 1.6 and 3 GHz and the bandwidth is tunable from 0.6 to 1 GHz. The filter consumes about 2.5 mW for a supply voltage of 1.8 V at a centre frequency of 2.3 GHz.

Related content

This is a required field
Please enter a valid email address