Design of a 3 V-50 MHz analog CMOS current-mode NRL filter

Author

Hyun, Jai-Sop ; Yoon, Kwang S.

Author_Institution

Dept. of Electron. Eng., INHA Univ., Incheon, South Korea

Volume

1

fYear

1996

fDate

12-15 May 1996

Firstpage

129

Abstract

A 3 voltage analog CMOS current-mode continuous-time filter with a negative resistance load (NRL) is proposed. To design a current integrator, a modified basic current mirror with an NRL to increase the output resistance is employed The current integrator is designed to enhance the frequency behavior and operate in low voltage by employing a basic current mirror structure and diode connected input transistor. The third order Butterworth low pass active filter using a current-mode NRL integrator is synthesized and simulated for a 1.5 μm CMOS n-well standard process. Simulation results illustrate the cutoff frequency of 50 MHz and power consumption of 2.4 mW/pole with a 3 V power supply. The chip layout area of the third order low pass active filter only occupies 1 mm²

Keywords

Butterworth filters; CMOS analogue integrated circuits; VHF filters; continuous time filters; integrating circuits; low-pass filters; negative resistance; 1.5 micron; 3 V; 50 MHz; CMOS n-well standard process; NRL filter; analog CMOS current-mode filter; continuous-time filter; current integrator; current mirror; diode connected input transistor; frequency behavior; low pass active filter; negative resistance load; output resistance; third order Butterworth filter; Active filters; Bandwidth; Circuits; Frequency; MOSFETs; Mirrors; Power supplies; Signal processing; Transconductance; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 1996. ISCAS '96., Connecting the World., 1996 IEEE International Symposium on

Conference_Location

Atlanta, GA

Print_ISBN

0-7803-3073-0

Type

conf

DOI

10.1109/ISCAS.1996.539825

Filename

539825