Design of Cascode-Based Transconductance Amplifiers with Low-Gain PVT Variability and Gain Enhancement Using a Body-Biasing Technique

Nuno Pereira (1) , Luis B. Oliveira (2, 1) , João Goes (2, 1)

1 FCT NOVA - Faculdade de Ciências e Tecnologia = School of Science & Technology
2 NOVA - Universidade Nova de Lisboa = NOVA University Lisbon

A body-biasing compensation scheme based on two proportional-to-absolute-temperature (PTAT) circuits is proposed to reduce the PVT variability of the DC gain of cascode amplifiers. A brief description of a basic PTAT is given as well as its application to cascode-based operational transconductance amplifiers. Simulation results show that the proposed compensated circuit amplifier exhibit a (DC) gain variability smaller than the original (uncompensated) circuit, while reaching a gain enhancement of about 3 dB.

Mots clés: amplifier; body-biasing; CMOS analog circuits; PVT compensation

Domaines: Informatique [cs]

Nuno Pereira, Luis B. Oliveira, João Goes. Design of Cascode-Based Transconductance Amplifiers with Low-Gain PVT Variability and Gain Enhancement Using a Body-Biasing Technique. 4th Doctoral Conference on Computing, Electrical and Industrial Systems (DoCEIS), Apr 2013, Costa de Caparica, Portugal. pp.590-599, ⟨10.1007/978-3-642-37291-9_64⟩. ⟨hal-01348806⟩