Title :
NPN-only fully-differential ladder log-companding filter with well-defined operation points
Author :
Pookrongtong, Nattapon ; Chanapromma, Chaiyan ; Mahattanakul, Jirayuth ; Worapishet, Apisak
Author_Institution :
Dept. of Electron. Eng., Mahanakorn Univ. of Technol., Bangkok, Thailand
Abstract :
This paper presents novel structure of the ladder-based fully-differential log-companding filter with well-defined operating points. The proposed filter structure is based on the exponential-state-space integrators with compatible input and output voltage levels. Based upon the proposed structure, the derivation of the NPN-only 7rd-order fully-differential log-companding Butterworth low-pass filter is demonstrated. Simulation results of the demonstrated filters are given.
Keywords :
Butterworth filters; ladder filters; low-pass filters; Butterworth low-pass filter; NPN-only 7<;sup>rd<;/sup>-order filter; exponential-state-space integrators; filter structure; input voltage level; ladder-based fully-differential log-companding filter; output voltage level; Band pass filters; BiCMOS integrated circuits; Low pass filters; Maximum likelihood detection; Nonlinear filters; Simulation;
Conference_Titel :
Communications and Information Technologies (ISCIT), 2010 International Symposium on
Conference_Location :
Tokyo
Print_ISBN :
978-1-4244-7007-5
Electronic_ISBN :
978-1-4244-7009-9
DOI :
10.1109/ISCIT.2010.5664862
