A low-power wide dynamic range envelope detector

被引：54

作者：

Zhak, SM ^{[1
]}

Baker, MW ^{[1
]}

Sarpeshkar, R ^{[1
]}

机构：

[1] MIT, Elect Res Lab, Cambridge, MA 02139 USA

来源：

IEEE JOURNAL OF SOLID-STATE CIRCUITS | 2003年 / 38卷 / 10期

关键词：

bionic ear; cochlear implant; envelope detector; hearing aids; peak detector; rectifier; ultralow power;

D O I：

10.1109/JSSC.2003.817599

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

We report a 75-dB 2.8-muW 100-Hz-10-kHz envelope detector in a 1.5-mum 2.8-V CMOS technology. The envelope detector performs input dc insensitive voltage-to-current converting rectification followed by novel nanopower current-mode peak detection. The use of a subthreshold wide linear range transconductor allows greater than 1.7-V-PP input voltage swings. We show theoretically that the optimal performance of this circuit is technology independent for the given topology and may be improved only by spending more power due to thermal noise rectification limits. A novel circuit topology is used to perform 140-nW peak detection with controllable attack and release time constants. We demonstrate good agreement of experimentally measured results with theory. The envelope detector is useful in low-power bionic implants for the deaf, hearing aids, and speech-recognition front-ends.

引用

页码：1750 / 1753

页数：4

共 12 条

[1] BAKER M, 2003, P IEEE INT S CIRC SY, V5, P1
[2] Dominguez-Castro R., 1992, Proceedings of Eighteenth European Solid-State Circuits Conference (ESSCIRC '92), P242
[3] LOG-DOMAIN FILTERING - AN APPROACH TO CURRENT-MODE FILTERING
FREY, DR
[J]. IEE PROCEEDINGS-G CIRCUITS DEVICES AND SYSTEMS, 1993, 140 (06): : 406 - 416
[4] Design of a micropower current-mode log-domain analog cochlear implant
Germanovix, W
Toumazou, C
[J]. IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-EXPRESS BRIEFS, 2000, 47 (10) : 1023 - 1046
[5] Kurashina T., 1998, 1998 IEEE International Conference on Electronics, Circuits and Systems. Surfing the Waves of Science and Technology (Cat. No.98EX196), P143, DOI 10.1109/ICECS.1998.813954
[6] LU T, 2003, P IEEE INT S CIRC SY, V5, P41
[7] A low-power wide-linear-range transconductance amplifier
Sarpeshkar, R
Lyon, RF
Mead, C
[J]. ANALOG INTEGRATED CIRCUITS AND SIGNAL PROCESSING, 1997, 13 (1-2) : 123 - 151
[8] A low-power wide-dynamic-range analog VLSI cochlea
Sarpeshkar, R
Lyon, RF
[J]. ANALOG INTEGRATED CIRCUITS AND SIGNAL PROCESSING, 1998, 16 (03) : 245 - 274
[9] A LOW-VOLTAGE LOW-POWER FULLY-INTEGRATABLE FRONT-END FOR HEARING INSTRUMENTS
SERDIJN, WA
VANDERWOERD, AC
DAVIDSE, J
VANROERMUND, AHM
[J]. IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS I-FUNDAMENTAL THEORY AND APPLICATIONS, 1995, 42 (11): : 920 - 932
[10] NOVEL-APPROACH TO HIGH-SPEED CMOS CURRENT COMPARATORS
TRAFF, H
[J]. ELECTRONICS LETTERS, 1992, 28 (03) : 310 - 312

← 1 2 →