Bulk-driven CMOS linear transconductance-cell for AC amplifiers with very low cut-off frequency
Consultable a partir de
2024-11-01
Fecha
2023Autor
Versión
Acceso embargado / Sarbidea bahitua dago
Tipo
Artículo / Artikulua
Versión
Versión aceptada / Onetsi den bertsioa
Identificador del proyecto
/TED2021-131052B-C21 /TED2021-132372B-I00
Impacto
|
10.1016/j.aeue.2023.154874
Resumen
This manuscript proposes a novel linearized transconductor for AC amplifiers with a very low cut-off frequency.
The cell uses an alternative solution that is based on a modified source-degeneration OTA, using two bulkdriven buffers, incorporating bootstrapping techniques to a buffer and a degenerated resistor. In the buffer,
the bootstrapping effect is implemented by using a pseudo-resistor and ...
[++]
This manuscript proposes a novel linearized transconductor for AC amplifiers with a very low cut-off frequency.
The cell uses an alternative solution that is based on a modified source-degeneration OTA, using two bulkdriven buffers, incorporating bootstrapping techniques to a buffer and a degenerated resistor. In the buffer,
the bootstrapping effect is implemented by using a pseudo-resistor and a linear capacitor properly configured,
whereas in the resistor the output voltages of the buffers are used with this goal. Thus, the proposed solution
allows realizing a very large time constant, avoiding the use of very large size resistors and capacitors, thus
saving chip area. The technique is demonstrated in an 0.18 μm CMOS technology by designing an OTA operating
with a supply voltage of 0.6 V and achieving a low cut-off frequency of around 2 Hz with a power consumption
of 462 nW. [--]
Materias
AC amplifier,
Bootstrapping,
Bulk-driven,
Low-voltage,
Very-low cutoff frequency
Editor
Elsevier
Publicado en
International Journal of Electronics and Communications (AEU) 171 (2023) 154874
Departamento
Universidad Pública de Navarra. Departamento de Ingeniería Eléctrica, Electrónica y de Comunicación /
Nafarroako Unibertsitate Publikoa. Ingeniaritza Elektrikoa, Elektronikoa eta Telekomunikazio Ingeniaritza Saila /
Universidad Pública de Navarra/Nafarroako Unibertsitate Publikoa. Institute of Smart Cities - ISC
Versión del editor
Entidades Financiadoras
This work was supported by Spanish Research Agency and the EU/PTR Next Generation Funds, under grants TED2021-131052B-C21 and TED2021-132372B-I00.