|
For Full-Text PDF, please login, if you are a member of IEICE,
or go to Pay Per View on menu list, if you are a nonmember of IEICE.
|
A Basic Study on a Very Low-Level DC Current Amplifier Using a Switched-Capacitor Circuit
Hiroki HIGA Naoki NAKAMURA Ikuo NAKAMURA
Publication
IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Vol.E88-A
No.6
pp.1394-1400 Publication Date: 2005/06/01 Online ISSN:
DOI: 10.1093/ietfec/e88-a.6.1394 Print ISSN: 0916-8508 Type of Manuscript: Special Section PAPER (Special Section on Papers Selected from 2004 International Technical Conference on Circuits/Systems, Computers and Communications (ITC-CSCC 2004)) Category: Keyword: dc amplifier, small current measurement, negative feedback, positive feedback, switched-capacitor,
Full Text: PDF(755KB)>>
Summary:
In order to miniaturize a very low-level dc current amplifier and to speed up its output response speed, we proposed to employ the switched-capacitor circuit (SCC) as its negative feedback circuit, instead of the conventionally used high-ohmage resistor. However, in the case of using SCC, the output waveform had unnecessary components. To decrease the effect of these components and to speed up the response speed, we used a switched-capacitor filter (SCF), an offset controller, and a positive feedback circuit. As a result, we demonstrated that it was useful to use the amplifier using the SCC.
|
open access publishing via
|
|
|
|
|
|
|
|