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A precise 90º quadrature OTA-C oscillator tunable in the 50-130-MHz range

Opened Access A precise 90º quadrature OTA-C oscillator tunable in the 50-130-MHz range

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Autor: Linares Barranco, Bernabé
Serrano Gotarredona, María Teresa
Ramos Martos, J.
Ceballos Cáceres, Joaquín Francisco
Linares Barranco, Alejandro
Departamento: Universidad de Sevilla. Departamento de Arquitectura y Tecnología de Computadores
Fecha: 2004
Publicado en: IEEE Transactions on Circuits and Systems I: Regular Papers, 51 (4), 649-663.
Tipo de documento: Artículo
Resumen: We present a very-large-scale integration continuous-time sinusoidal operational transconductance amplifiers quadrature oscillator fabricated in a standard double-poly 0.8-μm CMOS process. The oscillator is tunable in the frequency range from 50 to 130 MHz. The two phases produced by the oscillator show a low-quadrature phase error. A novel current-mode amplitude control scheme is developed that allows for very small amplitudes. Stability of the amplitude control loop is studied as well as design considerations for its optimization. Experimental results are provided.
Cita: Linares Barranco, B., Serrano Gotarredona, M.T., Ramos Martos, J., Ceballos Cáceres, J.F. y Linares Barranco, A. (2004). A precise 90º quadrature OTA-C oscillator tunable in the 50-130-MHz range. IEEE Transactions on Circuits and Systems I: Regular Papers, 51 (4), 649-663.
Tamaño: 562.9Kb
Formato: PDF

URI: https://hdl.handle.net/11441/76164

DOI: 10.1109/TCSI.2004.823673

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