DocumentCode :
31626
Title :
A Single-Branch Third-Order Pole–Zero Low-Pass Filter With 0.014- \\hbox {mm}^{2} Die Size and 0.8-kHz (1.25-nW) to 0.94-GHz (3.99-mW) Bandwidth–Power Scalabil
Author :
Yong Chen ; Pui-In Mak ; D´Amico, S. ; Li Zhang ; He Qian ; Yan Wang
Author_Institution :
Inst. of Microelectron., Tsinghua Univ., Beijing, China
Volume :
60
Issue :
11
fYear :
2013
fDate :
Nov. 2013
Firstpage :
761
Lastpage :
765
Abstract :
A single-branch third-order low-pass filter with an ultracompact die size and extensive bandwidth (BW)-power scalability is described. It unifies a source follower , a stackable floating active inductor, and a feedforward capacitor to constitute a transistorized- LC-ladder topology with a stable pole-zero transfer function over a wide range of tunable BW. Differentially, only eight transistors and five untuned capacitors are required. Fabricated in 0.18- μm CMOS, the prototype occupies 0.014- mm2 die size. By scaling the bias current (and, hence, the power), the flexible BW measures 0.8 kHz at 1.25 nW and 0.94 GHz at 3.99 mW.
Keywords :
capacitors; feedforward; low-pass filters; poles and zeros; transfer functions; bias current; extensive bandwidth-power scalability; feedforward capacitor; frequency 0.8 kHz; frequency 0.94 GHz; power 1.25 nW; power 3.99 mW; single-branch third-order pole-zero low-pass filter; size 0.18 mum; source follower; stable pole-zero transfer function; stackable floating active inductor; transistorized-LC-ladder topology; tunable BW; ultracompact die size; untuned capacitors; Admittance; CMOS integrated circuits; Capacitors; Linearity; MOSFET; Tuning; CMOS; low-pass filter (LPF); source-follower-based; stackable floating active inductor (SFAI);
fLanguage :
English
Journal_Title :
Circuits and Systems II: Express Briefs, IEEE Transactions on
Publisher :
ieee
ISSN :
1549-7747
Type :
jour
DOI :
10.1109/TCSII.2013.2281717
Filename :
6615940
Link To Document :
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