Log-domain synthesis of an nth-order filter

被引：5

作者：

Wu, J ^{[1
]}

El-Masry, EI ^{[1
]}

机构：

[1] Tech Univ Nova Scotia, Dept Elect Engn, Halifax, NS B3J 2X4, Canada

来源：

INTERNATIONAL JOURNAL OF ELECTRONICS | 1998年 / 84卷 / 04期

关键词：

D O I：

10.1080/002072198134715

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：

A synthesis approach for a nth-order log-domain filter is proposed. Using the log-exponential relation between current and voltage of a bipolar junction transistor (BJT) or MOS transistors operating in weak inversion, a circuit transformation from log-domain to linear OTA-C fillers is developed. Based on the simulation of a signal-flow-graph on the nth-order transfer function, the realization of the high-order log-domain filter is presented. A 4th-order low-pass filter is designed and simulated in HSPICE.

引用

页码：359 / 369

页数：11

共 12 条

[1]

ADAMS RW, 1979, 63 AES C NEW YORK MA

[2]

Enz C. C., 1996, Emerging Technologies: Designing Low Power Digital Systems (Cat. No.96TH8189), P79, DOI 10.1109/ETLPDS.1996.508872

[3] CURRENT-MODE CLASS AB 2ND-ORDER FILTER [J].

FREY, D .

ELECTRONICS LETTERS, 1994, 30 (03) :205-206

[4] LOG-DOMAIN FILTERING - AN APPROACH TO CURRENT-MODE FILTERING [J].

FREY, DR .

IEE PROCEEDINGS-G CIRCUITS DEVICES AND SYSTEMS, 1993, 140 (06) :406-416

[5]

FREY DR, 1993, P INT S CIRCUITS SYS, V1, P1435

[6] The design of log-domain filters based on the operational simulation of LC ladders [J].

Perry, D ;

Roberts, GW .

IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-ANALOG AND DIGITAL SIGNAL PROCESSING, 1996, 43 (11) :763-774

[7]

PUNZENBERGER M, 1995, P INT S CIRCUITS SYS, V1, P2112

[8]

PUNZENBERGER M, 1996, P IEEE INT S CIRC SY, V1, P125

[9]

SEEVINCK E, 1990, ELECTRON LETT, V26, P2064

[10] MICROPOWER LOG-DOMAIN FILTER FOR ELECTRONIC COCHLEA [J].

TOUMAZOU, C ;

NGARMNIL, J ;

LANDE, TS .

ELECTRONICS LETTERS, 1994, 30 (22) :1839-1841

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