New CMOS current-mode amplitude shift keying demodulator (ASKD) dedicated for implantable electronic devices

Author

Djemouai, A. ; Sawan, M.

Author_Institution

Dept. of Electr. Eng., Montreal Univ., Que., Canada

Volume

1

fYear

2004

fDate

23-26 May 2004

Abstract

We propose in this paper a new CMOS integrated amplitude shift-keying (ASK) demodulator dedicated for implantable electronic device (IED) systems. ASK modulation is commonly used in the wireless data transmission systems of IEDs. The proposed ASK demodulator (ASKD) is used to extract digital data from two-level ASK modulated current signal. The ASKD allows to detect current levels with very small modulation depth which is defined as the difference between the two allowable ASK amplitude levels. The design is not complex and it is less sensitive to process variation. The circuit is implemented with 0.18 μm, 1.8 V CMOS technology and currently it is under fabrication. Preliminary post-layout simulation results allow to prove the proposed concept for an input signal of 250 KHz at current amplitude varying between 4 and 4.5 μA.

Keywords

CMOS integrated circuits; amplitude shift keying; circuit simulation; current-mode circuits; demodulators; electric current; integrated circuit design; 0.18 micron; 1.8 V; 250 kHz; ASK modulated current signal; ASK modulation; CMOS integrated demodulator; CMOS technology; amplitude level; amplitude shift keying demodulator; circuit fabrication; current level detection; current-mode demodulator; digital data extraction; implantable electronic devices; modulation depth; post-layout simulation; process variation sensitivity; wireless data transmission systems; Amplitude modulation; Amplitude shift keying; CMOS technology; Circuits; Data communication; Data mining; Demodulation; Digital modulation; Fabrication; Implants;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 2004. ISCAS '04. Proceedings of the 2004 International Symposium on

Print_ISBN

0-7803-8251-X

Type

conf

DOI

10.1109/ISCAS.2004.1328226

Filename

1328226