Statistical multiparameter sensitivity measure of gain and phase functions

This paper considers general sensitivity analysis and dynamic range of quad filters. The use of quad structures in the design of symmetrical and/or unsymmetrical active filters is studied from the sensitivity and dynamic range points of view and these are compared with other design methods. Determination of gain constants of biquadratic blocks either according to overloading or noise immunity or both for quad realization are also considered. It is shown that, especially for symmetrical transfer functions, the design equations are simple and that the sensitivity performance is as good as the FLF and LF configurations and better than GFLF. Furthermore, it is shown with an example that quad realization also yields better dynamic range as compared to GFLF.

Section: + a L S + A Omentioning

confidence: 99%

Sensitivity analysis and dynamic range of quad filters and some comparative results

Gönüleren

1982

Critical element analysis for the transfer, gain and phase functions in linear active filters

Acar

1979

SUMMARYIn linear active filters, the element criticalness, the most and the least critical elements, and also optimum tolerances have been defined for transfer, gain and phase functions. Simple and systematic procedures for computing their values, thus determining the ordered hierarchy of critical elements, are provided. Moreover, as an example, the element criticalness, the most and the least critical elements, and the optimum tolerances have been evaluated for Gopal's network realizing the third-order Butterworth characteristic and using equal-valued capacitors and resistors.

A comparative study of multiple amplifier active RC biquadratic sections

Padukone

Ghausi

1981

SUMMARYBiquadratic sections play an important role in the design of high order active filters. This paper compares a number of popular multiple amplifier active RC biquads on the basis of their sensitivities as well as wo and Q enhancement effects due to finite amplifier gain-bandwidth products (GB). For sensitivity comparison, statistical sensitivity measures, which take into account the tolerances of various passive and active elements, are used. Simple expressions for gain, phase and transfer function sensitivities are derived for the case of uncorrelated element variations. Graphic illustrations of the effects of increasing wo and Q on the sensitivity measures are presented. In addition, root-loci, which show the effects of GB on the network poles are included. To further facilitate the comparison, graphs demonstrating changes in wo and Q due to GB are also presented.