Title :
0.013 mm2, kHz-to-GHz-bandwidth, thirdorder all-pole lowpass filter with 0.52-to- 1.11 pW/pole/Hz efficiency
Author :
Yong Chen ; Pui-In Mak ; Li Zhang ; He Qian ; Yan Wang
Author_Institution :
Inst. of Microelectron., Tsinghua Univ., Beijing, China
Abstract :
A third-order all-pole analogue lowpass filter (LPF) with kHz-to-GHz bandwidth tunability is proposed. It embeds a current-reuse active inductor into a current-scalable source follower to realise three concurrently tunable poles in a single branch. The LPF fabricated in 0.18 μm CMOS measures a tunable - 3 dB cutoff from 0.8 kHz to 1.2 GHz, under a scalable power of 1.25 nW to 4.01 mW. Owing to no tuning capacitor, the die area is extremely compact (0.013 mm2) and the achieved filter efficiency is 0.52 to 1.11 pW/pole/Hz.
Keywords :
CMOS integrated circuits; UHF filters; UHF integrated circuits; VHF filters; inductors; integrated circuit measurement; low-pass filters; CMOS technology; LPF; bandwidth 0.8 kHz to 1.2 GHz; bandwidth tunability; current-reuse active inductor; current-scalable source follower; gain -3 dB; power 1.25 nW to 4.01 mW; single branch tunable pole; size 0.18 mum; third-order all-pole analogue lowpass filter; tuning capacitor;
Journal_Title :
Electronics Letters
DOI :
10.1049/el.2013.2670
