A new FMX stereo decoder IC design

Author

Jang, Dong Bee ; Koo, Sung Yub ; Shin, Young Ho ; Kim, Suk Ki

Author_Institution

Samsung Electronics, Kyunggi, South Korea

Volume

38

Issue

4

fYear

1992

fDate

11/1/1992 12:00:00 AM

Firstpage

805

Lastpage

811

Abstract

A frequency modulation extended (FMX) stereo decoder IC containing autotuning 19-kHz/38-kHz notch low-pass filters is discussed. The filters are implemented using OTAs (operational transconductance amplifiers) plus poly-poly capacitors. The autotuning techniques are used to overcome the effect of fabrication process parameter variations. A phase-locked VCO (voltage controlled oscillator) signal is used as master reference. The VCO was designed using a ceramic resonator and symmetrical reactance circuit, phase locked with the received pilot signal by the PLL scheme and adjustment free. The VCO is also used for demodulation of the subcarrier. The IC is fabricated using 2-μm bipolar techniques and is assembled in shrink 32-pin plastic DIP

Keywords

Hi-Fi equipment; active filters; bipolar integrated circuits; decoding; frequency modulation; linear integrated circuits; low-pass filters; notch filters; tuning; 19 kHz; 2 micron; 32-pin plastic DIP; 38 kHz; FM extended stereo decoder IC; FMX stereo decoder IC; OTA; PLL scheme; autotuning techniques; bipolar techniques; ceramic resonator; fabrication process parameter variations; master reference; notch low-pass filters; operational transconductance amplifiers; phase-locked VCO; pilot signal; poly-poly capacitors; subcarrier demodulation; symmetrical reactance circuit; voltage controlled oscillator; Capacitors; Decoding; Fabrication; Frequency modulation; Low pass filters; Operational amplifiers; Resonator filters; Signal design; Transconductance; Voltage-controlled oscillators;

fLanguage

English

Journal_Title

Consumer Electronics, IEEE Transactions on

Publisher

ieee

ISSN

0098-3063

Type

jour

DOI

10.1109/30.179969

Filename

179969