A low-power low-voltage OTA-C sinusoidal oscillator with a large tuning range |
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Authors: | Galan J. Carvajal R.G. Torralba A. Munoz F. Ramirez-Angulo J. |
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Affiliation: | Dept. Ingenieria Electron., Univ. de Huelva, Spain; |
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Abstract: | A new operational transconductance amplifier and capacitor based sinusoidal voltage controlled oscillator is presented. The transconductor uses two cross-coupled class-AB pseudo-differential pairs biased by a flipped voltage follower, and it exhibits a wide transconductance range with low power consumption and high linearity. The oscillator has been fabricated in a standard 0.8-/spl mu/m CMOS process. Experimental results show a frequency tuning range from 1 to 25 MHz. The amplitude is controlled by the transconductor nonlinear characteristic. The circuit is operated at 2-V supply voltage with only 1.58 mW of maximum quiescent power consumption. |
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