Design of highly linear tunable CMOS OTA for continuous-time filters

被引：47

作者：

Koziel, S ^{[1
]}

Szczepanski, S ^{[1
]}

机构：

[1] Gdansk Univ Technol, Fac Elect Telecommun & Informat, PL-80952 Gdansk, Poland

来源：

IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-EXPRESS BRIEFS | 2002年 / 49卷 / 02期

关键词：

complementary metal-oxide-semiconductor; (CMOS) integrated circuits; operational transconductance amplifiers (OTAs); OTA-C filters;

D O I：

10.1109/TCSII.2002.1002513

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：

An analytical method based on the standard square-law metal-oxide-semiconductor (MOS) modeling for the design of highly linear, fully differential complementary metal-oxide-semiconductor (CMOS) operational transconductance amplifier (OTA) is presented. The proposed circuit implementation combines a cross-coupled quad cell and a source-coupled differential pair, as well as the current mirror technique in the output stage. As a result, improved linearity of the developed OTA over the large tuning range is obtained. SPICE simulations show that for 0.5-mum HP AMOS14TB process (MOSIS) with a +/-2.5 V power supply, total harmonic distortion (THD) at 2.5V(pp) is less than 0.5%. The dynamic range is equal to 76 dB at power consumption 5.7 mW. The alternative OTA structures are also discussed and compared to the basic version; for this circuit THD at 2.5V(pp) is less than 0.2%, however, the circuit is much more sensitive to the transistor mismatch. As an example, the OTA is used to design a third-order elliptic lowpass filter in the high-frequency range. The cutoff frequency of the filter is tunable in the range of 4.6-29.6 MHz.

引用

页码：110 / 122

页数：13

共 17 条

[1] A BICMOS LOW DISTORTION TUNABLE OTA FOR CONTINUOUS-TIME FILTERS [J].

ALI, MI ;

HOWE, M ;

SANCHEZSINENCIO, E ;

RAMIREZANGULO, J .

IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS I-FUNDAMENTAL THEORY AND APPLICATIONS, 1993, 40 (01) :43-49

[2] TUNABLE BICMOS CONTINUOUS-TIME FILTER FOR HIGH-FREQUENCY APPLICATIONS [J].

ALINI, R ;

BASCHIROTTO, A ;

CASTELLO, R .

IEEE JOURNAL OF SOLID-STATE CIRCUITS, 1992, 27 (12) :1905-1915

[3]

[Anonymous], 1990, VLSI DESIGN TECHNIQU

[4] ACTIVE-FILTER DESIGN USING OPERATIONAL TRANSCONDUCTANCE AMPLIFIERS - A TUTORIAL [J].

GEIGER, RL ;

SANCHEZSINENCIO, E .

IEEE CIRCUITS & DEVICES, 1985, 1 (02) :20-32

[5] High-frequency two-input CMOS OTA for continuous-time filter applications [J].

Glinianowicz, J ;

Jakusz, J ;

Szczepanski, S ;

Sun, Y .

IEE PROCEEDINGS-CIRCUITS DEVICES AND SYSTEMS, 2000, 147 (01) :13-18

[6] HIGH-FREQUENCY CMOS CONTINUOUS-TIME FILTERS [J].

KHORRAMABADI, H ;

GRAY, PR .

IEEE JOURNAL OF SOLID-STATE CIRCUITS, 1984, 19 (06) :939-948

[7] DESIGN OF A 15-MHZ CMOS CONTINUOUS-TIME FILTER WITH ON-CHIP TUNING [J].

KHOURY, JM .

IEEE JOURNAL OF SOLID-STATE CIRCUITS, 1991, 26 (12) :1988-1997

[8] A 4-MHZ CMOS CONTINUOUS-TIME FILTER WITH ON-CHIP AUTOMATIC TUNING [J].

KRUMMENACHER, F ;

JOEHL, N .

IEEE JOURNAL OF SOLID-STATE CIRCUITS, 1988, 23 (03) :750-758

[9]

Laker K. R, 1994, DESIGN ANALOG INTEGR

[10] HIGH-FREQUENCY VOLTAGE-CONTROLLED CONTINUOUS-TIME LOWPASS FILTER USING LINEARIZED CMOS INTEGRATORS [J].

NEDUNGADI, AP ;

GEIGER, RL .

ELECTRONICS LETTERS, 1986, 22 (14) :729-731

← 1 2 →