A voltage-controlled tunable thin-film distributed RC notch filter

Author

Choi, Won-Youl ; Trolier-McKinstry, Susan

Author_Institution

MEMS Lab., Samsung Adv. Inst. of Technol., Suwon, South Korea

Volume

24

Issue

1

fYear

2001

fDate

3/1/2001 12:00:00 AM

Firstpage

33

Lastpage

37

Abstract

Notch filters are widely used in communication and instrumentation systems not only for eliminating undesired frequencies and for measuring transient harmonic distortions, but also as central components of selective filters and oscillators in feedback arrangements. This paper describes the characteristics of a thin-film distributed RC (DRC) notch filter made from Au/TaN/Y-doped BaTiO₃ (Y-BT)/Pt. The dielectric (Y-BT) and resistive (TaN) films were grown by pulsed laser deposition (PLD). A notch frequency of 2.8 MHz and notch depth of -76.7 dB were measured from zero with a notch resistance (R_N) of 34 Ω. The experimental optimum notch parameters of α=R/R_N=19.7 and x_n=ω/ω₀=33.0 were obtained. Tunability of the notch frequency was observed with an applied DC bias voltage

Keywords

RC circuits; active filters; barium compounds; circuit feedback; circuit tuning; distributed parameter filters; gold; notch filters; pulsed laser deposition; tantalum compounds; thin film circuits; transfer functions; 2.8 MHz; 34 ohm; Au-TaN-BaTiO₃:Y; Curie constant; applied DC bias voltage; dielectric constant; dissipation factors; notch depth; notch frequency; notch resistance; optimum notch parameters; pulsed laser deposition; selective filters; thin-film distributed RC notch filter; voltage transfer function; voltage-controlled tunable; Dielectric measurements; Dielectric thin films; Filters; Frequency measurement; Instruments; Laser feedback; Pulsed laser deposition; Transistors; Tunable circuits and devices; Voltage;

fLanguage

English

Journal_Title

Components and Packaging Technologies, IEEE Transactions on

Publisher

ieee

ISSN

1521-3331

Type

jour

DOI

10.1109/6144.910799

Filename

910799