Right-direct (BI) type wide bandpass SC ladder filter with compensation for finite amplifier gain and offset voltage | Zendy

Nikolay Radev | Zendy; Kantcho Ivanov | Zendy; Kalin Stanchev | Zendy

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Right-direct (BI) type wide bandpass SC ladder filter with compensation for finite amplifier gain and offset voltage

Author(s) -

Nikolay Radev,

Kantcho Ivanov,

Kalin Stanchev

Publication year - 2008

Publication title -

facta universitatis - series electronics and energetics

Language(s) - English

Resource type - Journals

eISSN - 2217-5997

pISSN - 0353-3670

DOI - 10.2298/fuee0802233r

Subject(s) - operational amplifier , capacitor , integrator , band pass filter , amplifier , input offset voltage , operational amplifier applications , switched capacitor , offset (computer science) , control theory (sociology) , electronic engineering , electrical engineering , engineering , computer science , voltage , cmos , control (management) , artificial intelligence , programming language

In this paper gain- and offset-compensated (GOC) modificati on of a sixth- order right-direct (BI) type wide bandpass switched-capacitor (SC) ladder filter is pro- posed. It is based on the use of simple and fast operational amplifiers (op amps) with low but precisely known and stable dc gain A. At first, the conventional integrators in the filter are replaced with GOC integrators and the unswit ched capacitors in the capacitive loops are split into two capacitors. Subsequent ly, the nominal op amps gain value A0 is taking into account in the capacitance sizing of some appropriately chosen capacitors.

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