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1 International Journal of Microelectronics and Computer Science

1 2013

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Cascode ampliﬁers with low-gain variability and gain enhancement using a body-biasing technique

Pereira N, Oliveira L. B., Goes J., Oliveira J. P.

International Journal of Microelectronics and Computer Science

2013

Vol. 4, nr 3

98--102

This paper presents a simple circuit technique to reduce gain variability with PVT variations in cascode ampliﬁers using a body-biasing scheme, while enhancing the overall gain of the ampliﬁer. Simulation results of a standard telescopic-cascode ampliﬁer, in two different nanoscale CMOS technologies (130 nm and 65 nm) show that the proposed compensated circuit ampliﬁer exhibits a (DC) gain variability smaller (below ± 0.5 dB) than the original (uncompensated) circuit, while reaching a gain enhancement of about 3 dB. The required auxiliary biasing circuit dissipates around 5% of the main ampliﬁer circuit.