A 1.1 GHz fifth order active-LC butterworth type equalizing filter Conference Paper uri icon

abstract

  • This paper describes architectural and design considerations for low power, GHz range wideband low-pass active filters. A series LC resonator based biquad is proposed and its power efficiency is shown to be over 7 times better than an equivalent Gm-C biquad. Reduced number of active elements and readily available bandpass and low-pass signals make this topology particularly suitable for efficient realization of equalizing functions. Also demonstrated is a common-mode feedback scheme that allows for a stable, high accuracy common-mode control with loop bandwidth which can exceed twice the filter's bandwidth. A fifth order active-LC Butterworth filter prototype is fabricated in a standard 0.18 m CMOS technology. It provides a bandwidth of 1.1 GHz and features equalization gain programmable over a 023 dB range. It is experimentally verified to achieve 47 dB SNR and -48 dB IM3 with 250 mVpp swing while consuming 72 mW of power. 2007 IEEE.

published proceedings

  • IEEE JOURNAL OF SOLID-STATE CIRCUITS

altmetric score

  • 3

author list (cited authors)

  • Dhanasekaran, V., Gambhir, M., Silva-Martinez, J., & Sanchez-Sinencio, E.

citation count

  • 11

complete list of authors

  • Dhanasekaran, Vijay||Gambhir, Manisha||Silva-Martinez, Jose||Sanchez-Sinencio, Edgar

publication date

  • November 2007