An analog front end for v.22bis modems

An analog front end for the 2400-b/s v.22bis modem has been implemented in a 3- mu m CMOS process. A high level of integration in the front end results in a low-cost, high-performance modem system. A mix of analog switched-capacitor and digital circuits is used throughout the chip. Some of the major...

Ausführliche Beschreibung

Gespeichert in:

Bibliographische Detailangaben
Veröffentlicht in:	IEEE journal of solid-state circuits 1988-08, Vol.23 (4), p.978-986
Hauptverfasser:	Hurst, P.J., Glad, T.J., Illgner, J.J., Landsburg, G.F.
Format:	Artikel
Sprache:	eng
Schlagworte:	Analog-digital conversion Applied sciences CMOS process Digital circuits Exact sciences and technology Filters Information, signal and communications theory Modems Modulation coding Modulation, demodulation Photonic band gap Signal and communications theory Signal generators Switching circuits Telecommunications and information theory Voltage
Online-Zugang:	Volltext bestellen
Tags:	Tag hinzufügen Keine Tags, Fügen Sie den ersten Tag hinzu!

Beschreibung
Zusammenfassung:	An analog front end for the 2400-b/s v.22bis modem has been implemented in a 3- mu m CMOS process. A high level of integration in the front end results in a low-cost, high-performance modem system. A mix of analog switched-capacitor and digital circuits is used throughout the chip. Some of the major functional blocks are a modulator, tone generator, band-split filters, programmable receive gain stage, 8-bit ADC (analog-to-digital converters), bandgap voltage reference, and special signal detectors. Features are included to support a number of lower-speed, split-band modem standards. The chip occupies 59000 mils/sup 2/ and dissipates 200 mW. System and circuit aspects of the design are discussed; measured performance of the IC and of the complete modem system are given.< >
ISSN:	0018-9200 1558-173X
DOI:	10.1109/4.349