Reduction the effects of opamp finite gain and offset voltage in LDI termination with a minus one half delay of SC ladder filters | Zendy

Nikolay Radev | Zendy; Kantcho Ivanov | Zendy

Open Access

Reduction the effects of opamp finite gain and offset voltage in LDI termination with a minus one half delay of SC ladder filters

Author(s) -

Nikolay Radev,

Kantcho Ivanov

Publication year - 2006

Publication title -

serbian journal of electrical engineering

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.133

H-Index - 5

eISSN - 2217-7183

pISSN - 1451-4869

DOI - 10.2298/sjee0601045r

Subject(s) - integrator , op amp integrator , offset (computer science) , control theory (sociology) , operational amplifier , input offset voltage , voltage , phase margin , physics , mathematics , engineering , electronic engineering , computer science , electrical engineering , amplifier , cmos , control (management) , artificial intelligence , programming language

In this paper a combined approach for reducing the effects of op amp imperfections (finite gain A and offset voltage VOS) in first-order SC cell, realizing LDI (loss less discrete integrator) termination with a minus one half delay is presented. First, the conventional integrator is replaced with gain- and offset-compensated (GOC) integrator. Next, the gain errors m(ω) and the phase errors θ(ω) are further reduced by using the precise op amp gain approach in the GOC structure. The variation of the dc gain A from its nominal value A0 is taken into account

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