Title :
The VDDDA in multifunction filterwith mutually independent Q and ω0 control feature
Author :
Koton, Jaroslav ; Herencsar, Norbert ; Vrba, K. ; Metin, B.
Author_Institution :
Dept. of Telecommun., Brno Univ. of Technol., Brno, Czech Republic
Abstract :
The paper focuses on the application possibilities of the newly presented voltage differencing active building block called voltage differencing differential difference amplifier - VDDDA. Using this active element, a multifunction frequency filter is designed featuring the possibility of mutually independent control of quality factor Q and characteristic frequency ω0 by means of active elements. The structure of the filter is based on the idea of the Akerberg-Mossberg (AM) filter, i.e. the integrators in the structure are always realized only by two active elements. This fact results in better phase compensation for the filter. Compared to the AM opamp based filter, the newly proposed structure features high-impedance inputs, low-impedance output, and all basic frequency responses. The performance of the proposed structure has been verified by SPICE simulations using the TSMC 0.18 μm level-7 SCN018 CMOS process parameters with ±0.9 V supply voltage.
Keywords :
CMOS analogue integrated circuits; Q-factor; active filters; differential amplifiers; frequency response; AM filter; AM opamp-based filter; Akerberg-Mossberg filter; SPICE simulations; TSMC level-7 SCN018 CMOS process parameters; VDDDA; active element; active elements; characteristic frequency; frequency response; high-impedance inputs; low-impedance output; multifunction frequency filter; mutually-independent control; phase compensation; quality factor; size 0.18 mum; voltage differencing active building block; voltage differencing differential difference amplifier; Band-pass filters; CMOS integrated circuits; Frequency control; Q-factor; Semiconductor device modeling; Topology; Transconductance;
Conference_Titel :
Electrical and Electronics Engineering (ELECO), 2013 8th International Conference on
Conference_Location :
Bursa
Print_ISBN :
978-605-01-0504-9
DOI :
10.1109/ELECO.2013.6713935