A High Impedance Current Source Using Active Resistor

Takeshi KOIKE  Hiroki SATO  Akira HYOGO  Keitaro SEKINE  

IEICE TRANSACTIONS on Electronics   Vol.E90-C    No.6    pp.1315-1317
Publication Date: 2007/06/01
Online ISSN: 1745-1353
DOI: 10.1093/ietele/e90-c.6.1315
Print ISSN: 0916-8516
Type of Manuscript: Special Section LETTER (Special Section on Analog Circuits and Related SoC Integration Technologies)
current source,  high impedance,  CMOS,  circuit design,  

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This paper presents a novel method to increase an impedance of a current source. The proposed circuit with a cascode and gain-boosting configuration is also presented. The operation has been confirmed by simulation using a 0.18 µm CMOS technology.