By Using Darlington Topology Improvement of In-Band Gain for the Log Domain Filters

Author

Arslanalp, Remzi ; Tola, Abdullah T.

Author_Institution

Elektrik-Elektronik Muhendisligi Bolumu, Pamukkale Univ., Denizli

fYear

2006

fDate

17-19 April 2006

Firstpage

1

Lastpage

4

Abstract

By using Darlington topology, an alternative circuit is proposed to overcome the in-band gain problem for the log domain circuits. This idea is applied to a third order elliptic filter synthesized in the log domain. Simulations are performed in order to compare the performances of ideal transistors with infinite forward gain, CBIC-R transistors and CBIC-R transistors connected in Darlington topology. The AC response of the Darlington connected transistors gives better performance in terms of in-band gain. THD and noise performances are also investigated. In addition, the circuit is driven by a signal at the filter´s corner frequency, i.e. f=100 kHz, for the time domain analysis. The results are discussed

Keywords

bipolar transistors; elliptic filters; harmonic distortion; time-domain analysis; 100 kHz; Darlington topology; THD; ideal transistor; log domain filter; noise performance; third order elliptic filter synthesis; time domain analysis; Circuit noise; Circuit simulation; Circuit synthesis; Circuit topology; Filters; Frequency; Performance gain; Time domain analysis;

fLanguage

English

Publisher

ieee

Conference_Titel

Signal Processing and Communications Applications, 2006 IEEE 14th

Conference_Location

Antalya

Print_ISBN

1-4244-0238-7

Type

conf

DOI

10.1109/SIU.2006.1659735

Filename

1659735