Seeking maximum linearity of transfer functions

Author(s)

Silva, Filipi N. ; Comin, Cesar H. ; Costa, Luciano da F.

• Document type: Journal article
• Source: Review of Scientific Instruments; v. 87, n. 12 DEC 2016.
• Web of Science Citations: 2

Abstract

Linearity is an important and frequently sought property in electronics and instrumentation. Here, we report a method capable of, given a transfer function (theoretical or derived from some real system), identifying the respective most linear region of operation with a fixed width. This methodology, which is based on least squares regression and systematic consideration of all possible regions, has been illustrated with respect to both an analytical (sigmoid transfer function) and a simple situation involving experimental data of a low-power, one-stage class A transistor current amplifier. Such an approach, which has been addressed in terms of transfer functions derived from experimentally obtained characteristic surface, also yielded contributions such as the estimation of local constants of the device, as opposed to typically considered average values. The reported method and results pave the way to several further applications in other types of devices and systems, intelligent control operation, and other areas such as identifying regions of power law behavior. Published by AIP Publishing. (AU)

• FAPESP's process: 15/08003-4 - Complex network approach to e-Science and dynamic datasets
• Grantee: Filipi Nascimento Silva
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• FAPESP's process: 15/18942-8 - Associating Complex Networks with Effective Feature Spaces
• Grantee: Cesar Henrique Comin
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• FAPESP's process: 11/50761-2 - Models and methods of e-Science for life and agricultural sciences
• Grantee: Roberto Marcondes Cesar Junior
• Support Opportunities: Research Projects - Thematic Grants