A Low-Power Low-Voltage Second-Order High-Pass Butterworth Leapfrog Filter

Author

Serdijn, Wouter A.

Author_Institution

Dept. of Electr. Eng., Delft Univ. of Technol., Delft, Netherlands

fYear

1992

fDate

21-23 Sept. 1992

Firstpage

71

Lastpage

74

Abstract

A low-power bipolar continuous-time low-frequency high-pass second-order Butterworth filter that works in the current domain and operates from a single 1.3-V battery is presented. The filter contains two adjustable integrators. These integrators are realized by means of a capacitance and an adjustable transconductance amplifier with an indirect output. The complete filter, including all capacitances needed, can be integrated in a standard full-custom IC process. A semi-custom realization is shown. The filter demonstrates operation with battery voltages down to IV with less than 16 μW power consumption and a dynamic range of 50 dB. Its cutoff frequency can be varied exponentially with a control current from 100 Hz - 1 kHz.

Keywords

Butterworth filters; high-pass filters; integrated circuits; low-power electronics; operational amplifiers; Butterworth leapfrog filter; adjustable integrators; adjustable transconductance amplifier; bipolar continuous-time low-frequency filter; capacitance; frequency 100 Hz to 1 kHz; low-power low-voltage second-order high-pass filter; standard full-custom IC process; voltage 1 V; voltage 1.3 V; Batteries; Capacitance; Circuit noise; Cutoff frequency; Dynamic range; Energy consumption; Inductors; Passive filters; Transconductance; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Solid-State Circuits Conference, 1992. ESSCIRC '92. Eighteenth European

Conference_Location

Copenhagen

Print_ISBN

87-984232-0-7

Type

conf

DOI

10.1109/ESSCIRC.1992.5468449

Filename

5468449