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1 Bulletin of the Polish Academy of Sciences. Technical Sciences

1 2007

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Bandwidth analysis of low-pass elliptic biquadratic structures OPA-RC

Adrikowski T., Pasko M.

Bulletin of the Polish Academy of Sciences. Technical Sciences

2007

Vol. 55, nr 3

313-316

The influence of bandwidth of OPA on frequency characteristics was investigated in this paper. The analysis of frequency properties was carried out for two exemplary structures. For operational amplifier it was assumed a typical frequency macromodel with I-pole characteristic. Deformation of the frequency characteristic and the structure bandwidth in dependence on amplifiers bandwidth were analyzed. It was proved that shape of the char-acteristic to some degree depends on some elements values. The procedure was proposed for optimal choice of the values of (RC) elements, that ensures the characteristic is most approached to ideal one. Optimal values of these (RC) elements ensure that the characteristic of structures do not have any distortion in all frequencies, and these structures can be used in high frequency applications.