An 85–225MHz Chebyshev-II active-RC BPF with programmable BW and CF achieving over 30dBm IIP3 in 40nm CMOS

Author

Bo Wu ; Yun Chiu

Author_Institution

Texas Analog Center of Excellence, Univ. of Texas at Dallas, Richardson, TX, USA

fYear

2014

fDate

15-17 Sept. 2014

Firstpage

1

Lastpage

4

Abstract

A new technique to design for zero capacitance spread (ZCS) is reported for an 8th-order Chebyshev-II active-RC BPF that enables the application of integrator frequency compensation (IFC). Combined with wideband op-amps employing a current-reusing, split-path feed-forward compensation (FFC) technique, significant power savings is achieved in a 40nm CMOS prototype that measures a center frequency (CF) of 85-225 MHz and four bandwidth-to-center frequency (BW/CF) ratios of 5%-40%. Both the CF and BW/CF ratios are digitally programmable. The prototype consumes 33 mA from a 1.5V supply, with a peak measured in-band IIP3 of 31 dBm.

Keywords

CMOS integrated circuits; Chebyshev filters; active filters; band-pass filters; compensation; feedforward; 8th-order Chebyshev-II active-RC BPF; BW-CF ratios; CMOS prototype; IFC; IIP3; ZCS; bandwidth-to-center frequency ratios; current 33 mA; current-reusing; frequency 85 MHz to 225 MHz; integrator frequency compensation; programmable BW; size 40 nm; split-path FFC technique; split-path feed-forward compensation technique; voltage 1.5 V; wideband op-amps; zero capacitance spread;

fLanguage

English

Publisher

ieee

Conference_Titel

Custom Integrated Circuits Conference (CICC), 2014 IEEE Proceedings of the

Conference_Location

San Jose, CA

Type

conf

DOI

10.1109/CICC.2014.6946063

Filename

6946063