Abstract
Use of analog circuit elements in active networks have become very common and the demand for their miniaturization is increasing day by day. Though several methods are available for the miniaturization of these elements through large scale integration on single chips, the performance is not very satisfactory in low-frequency applications, due to the presence of parasitic capacitance that is comparable to the capacitance of active elements. As a result, the desired response gets deviated and also noise is involved. In this paper, an attempt has been made to devise methods for the elimination or reduction of the influence of these parasitic capacitances on filter circuits.
Highlights
The use of electronic filters for selective frequency filteration has become a common application in various fields
A more promising approach in filter design is the use of charge transfer devices (CTDs) to implement analog-sampled data transversal filters [1]
The performance is subjected to the following limitations: that, they are relatively inefficient in using the silicon area in implementing simple frequency response functions, the insertion losses are quite significant; and that they find it difficult to achieve the required level of noise performance with integrated MOS op-amps. Another approach to filter design is the use of switched-capacitors (SC) circuits, which consists of op-amps and capacitors interconnected by an array of periodically operated switches
Summary
Dept. of Electrical Engg., I.I.T., Hauz Khas, New Delhi-l10016, India (Received March 21, 1995; in final form May 5, 1995). Of Electrical Engg., I.I.T., Hauz Khas, New Delhi-l10016, India (Received March 21, 1995; in final form May 5, 1995). Use of analog circuit elements in active networks have become very common and the demand for their miniaturization is increasing day by day. Though several methods are available for the miniaturization of these elements through large scale integration on single chips, the performance is not very satisfactory in low-frequency applications, due to the presence of parasitic capacitance that is comparable to the capacitance of active elements. The desired response gets deviated and noise is involved. An attempt has been made to devise methods for the elimination or reduction of the influence of these parasitic capacitances on filter circuits
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