Low voltage digitally controlled dB-linear CMOS VGA circuit for wireless communication

Low voltage digitally controlled dB-linear CMOS VGA circuit for wireless communication

A new digitally controlled dB-linear variable gain amplifier (VGA) circuit is presented. The circuit is developed taking into account system level issues for a direct conversion receiver. The circuit uses a novel technique to digitally implement a dB-linear gain characteristic of 25 dB. The proposed...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: Elwan, H.O., Ismail, M.
Format: Tagungsbericht
Sprache:eng
Schlagworte:
Bandwidth
Baseband
CMOS digital integrated circuits
Communication system control
Digital control
Equations
Gain control
Low voltage
Voltage control
Wireless communication
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Beschreibung
Zusammenfassung:A new digitally controlled dB-linear variable gain amplifier (VGA) circuit is presented. The circuit is developed taking into account system level issues for a direct conversion receiver. The circuit uses a novel technique to digitally implement a dB-linear gain characteristic of 25 dB. The proposed VGA can process voltage or current input signals and operates in a fully differential configuration. APLAC simulations and experimental results from a 2 /spl mu/m chip fabricated through MOSIS are provided.
DOI:10.1109/ICECS.1998.813336