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7-decade tuning range CMOS OTA-C sinusoidal VCO


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Opened Access 7-decade tuning range CMOS OTA-C sinusoidal VCO

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Author: Serrano Gotarredona, María Teresa
Linares Barranco, Bernabé
Department: Universidad de Sevilla. Departamento de Arquitectura y Tecnología de Computadores
Date: 1998
Published in: Electronics Letters, 34 (17), 1621-1622.
Document type: Article
Abstract: A new operational transconductance amplifier-capacitor (OTA-C) based sinusoidal voltage-controlled oscillator (VCO) has been designed and fabricated, the oscillation frequency of which can be tuned from 74 mHz to 1 MHz. The VCO uses a new OTA whose transconductance is adjusted by using a set of special current mirrors. These current mirrors operate in weak inversion and their gain can be controlled continuously through a gate voltage over many decades. This is the first report of such a wide tuning range for CMOS sinusoidal oscillators. Experimental results are provided.
Cite: Serrano Gotarredona, M.T. y Linares Barranco, B. (1998). 7-decade tuning range CMOS OTA-C sinusoidal VCO. Electronics Letters, 34 (17), 1621-1622.
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DOI: 10.1049/el:19981200

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