Two-Stage Feedforward Class-AB CMOS OTA for Low-Voltage Filtering Applications

Phanumas KHUMSAT; Apisak WORAPISHET

doi:10.1093/ietele/e90-c.12.2293

Two-Stage Feedforward Class-AB CMOS OTA for Low-Voltage Filtering Applications

Phanumas KHUMSAT, Apisak WORAPISHET

Full Text Views

0

Share
Cite this

Summary :

A compact OTA suitable for low-voltage active-RC and MOSFET-C filters is presented. The input stage of the OTA utilises the NMOS pseudo-differential amplifier with PMOS active load. The output stage relies upon the dual-mode feed-forward class-AB technique (based on an inverter-type transconductor) with common-mode rejection capability that incurs no penalty on transconductance/bias-current efficiency. Simulation results of a 0.5-V 100-kHz 5th-order Chebyshev filter based on the proposed OTA in a 0.18 µm CMOS process indicate SNR and SFDR of 68 dB and 63 dB (at 50 kHz+55 kHz) respectively. The filter consumes total power consumption of 60 µW.

Publication: IEICE TRANSACTIONS on Electronics Vol.E90-C No.12 pp.2293-2296

Publication Date: 2007/12/01

Publicized

Online ISSN: 1745-1353

DOI: 10.1093/ietele/e90-c.12.2293

Type of Manuscript: LETTER

Category: Electronic Circuits

Cite this

Copy

Phanumas KHUMSAT, Apisak WORAPISHET, "Two-Stage Feedforward Class-AB CMOS OTA for Low-Voltage Filtering Applications" in IEICE TRANSACTIONS on Electronics, vol. E90-C, no. 12, pp. 2293-2296, December 2007, doi: 10.1093/ietele/e90-c.12.2293.
Abstract: A compact OTA suitable for low-voltage active-RC and MOSFET-C filters is presented. The input stage of the OTA utilises the NMOS pseudo-differential amplifier with PMOS active load. The output stage relies upon the dual-mode feed-forward class-AB technique (based on an inverter-type transconductor) with common-mode rejection capability that incurs no penalty on transconductance/bias-current efficiency. Simulation results of a 0.5-V 100-kHz 5th-order Chebyshev filter based on the proposed OTA in a 0.18 µm CMOS process indicate SNR and SFDR of 68 dB and 63 dB (at 50 kHz+55 kHz) respectively. The filter consumes total power consumption of 60 µW.
URL: https://globals.ieice.org/en_transactions/electronics/10.1093/ietele/e90-c.12.2293/_p

Copy

@ARTICLE{e90-c_12_2293,
author={Phanumas KHUMSAT, Apisak WORAPISHET, },
journal={IEICE TRANSACTIONS on Electronics},
title={Two-Stage Feedforward Class-AB CMOS OTA for Low-Voltage Filtering Applications},
year={2007},
volume={E90-C},
number={12},
pages={2293-2296},
abstract={A compact OTA suitable for low-voltage active-RC and MOSFET-C filters is presented. The input stage of the OTA utilises the NMOS pseudo-differential amplifier with PMOS active load. The output stage relies upon the dual-mode feed-forward class-AB technique (based on an inverter-type transconductor) with common-mode rejection capability that incurs no penalty on transconductance/bias-current efficiency. Simulation results of a 0.5-V 100-kHz 5th-order Chebyshev filter based on the proposed OTA in a 0.18 µm CMOS process indicate SNR and SFDR of 68 dB and 63 dB (at 50 kHz+55 kHz) respectively. The filter consumes total power consumption of 60 µW.},
keywords={},
doi={10.1093/ietele/e90-c.12.2293},
ISSN={1745-1353},
month={December},}

Copy

TY - JOUR
TI - Two-Stage Feedforward Class-AB CMOS OTA for Low-Voltage Filtering Applications
T2 - IEICE TRANSACTIONS on Electronics
SP - 2293
EP - 2296
AU - Phanumas KHUMSAT
AU - Apisak WORAPISHET
PY - 2007
DO - 10.1093/ietele/e90-c.12.2293
JO - IEICE TRANSACTIONS on Electronics
SN - 1745-1353
VL - E90-C
IS - 12
JA - IEICE TRANSACTIONS on Electronics
Y1 - December 2007
AB - A compact OTA suitable for low-voltage active-RC and MOSFET-C filters is presented. The input stage of the OTA utilises the NMOS pseudo-differential amplifier with PMOS active load. The output stage relies upon the dual-mode feed-forward class-AB technique (based on an inverter-type transconductor) with common-mode rejection capability that incurs no penalty on transconductance/bias-current efficiency. Simulation results of a 0.5-V 100-kHz 5th-order Chebyshev filter based on the proposed OTA in a 0.18 µm CMOS process indicate SNR and SFDR of 68 dB and 63 dB (at 50 kHz+55 kHz) respectively. The filter consumes total power consumption of 60 µW.
ER -