A high-output impedance, wide swing bulk-driven current source with dynamic biasing

Author

Haoran Yu ; El-Sankary, Kamal ; El-Masry, Ezz

Author_Institution

Dept. of Electr. & Comput. Eng., Dalhousie Univ., Halifax, NS, Canada

fYear

2012

fDate

April 29 2012-May 2 2012

Firstpage

1

Lastpage

4

Abstract

In this paper, a high-output impedance, wide output swing bulk-driven current source with dynamic biasing is proposed. To increase the output impedance, a bulk-driven gain-boosted cascode feedback amplifier is used. Two dynamic biasing circuits are introduced: one is used to adaptively bias the gate of the current source output transistor while the other is used to supplement current into the output node when the output voltage is low. In addition, the dynamic biasing circuits help to boost the output impedance further. Simulation results show that under 0.6 V supply voltage, the minimum output voltage is below 100 mV and the output impedance is over 200 MΩ.

Keywords

MOSFET; amplifiers; circuit feedback; constant current sources; electric impedance; transistor circuits; MOSFET; bulk-driven gain-boosted cascode feedback amplifier; current source output transistor; dynamic biasing circuit; high-output impedance; output voltage; wide output swing bulk-driven current source; CMOS integrated circuits; Feedback amplifier; Impedance; Logic gates; Low voltage; Mirrors; Transistors; Bulk-driven; MOSFET; current source;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical & Computer Engineering (CCECE), 2012 25th IEEE Canadian Conference on

Conference_Location

Montreal, QC

ISSN

0840-7789

Print_ISBN

978-1-4673-1431-2

Electronic_ISBN

0840-7789

Type

conf

DOI

10.1109/CCECE.2012.6334870

Filename

6334870