Low input impedance current differencing unit for current mode active devices improved by positive feedback and ZC-CDBA filter application

Author

Alaybeyoglu, Ersin ; Guney, Aydin ; Altun, Mustafa ; Kuntman, Hakan

Author_Institution

Dept. of Electron. & Commun. Eng., Istanbul Tech. Univ., Istanbul, Turkey

fYear

2013

fDate

28-30 Nov. 2013

Firstpage

26

Lastpage

30

Abstract

In current mode analog circuit design, current differencing unit is widely used at the input stage of the current mode analog building blocks. The low input impedance current differencing unit is excellent for current mode circuit realization. In the current study, the positive feedback is used for reducing the input impedance of current differencing unit. The proposed current differencing unit is tested at the input stage of the ZC-CDBA (Z copy current differencing buffered amplifier) recently published as a current mode analog building block. The proposed circuit for ZC-CDBA is verified with the KHN analog filter application. The circuit simulations are verified by using BSIM3 0.18 μm level-7 SPICE parameters.

Keywords

analogue circuits; differential amplifiers; filters; BSIM3 level-7 SPICE parameters; KHN analog filter application; Z-copy current differencing buffered amplifier; ZC-CDBA filter application; circuit simulation; current mode active devices; current mode analog building blocks; current mode analog circuit design; current mode circuit realization; input-impedance reduction; low-input impedance current differencing unit; positive feedback; size 0.18 mum;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical and Electronics Engineering (ELECO), 2013 8th International Conference on

Conference_Location

Bursa

Print_ISBN

978-605-01-0504-9

Type

conf

DOI

10.1109/ELECO.2013.6713929

Filename

6713929