Computer tools for switched-current filter design

The paper is devoted to design automation of switched-current (SI) filters. Three computer tools were elaborated recently by the authors. Two of them are useful at the stage of behavioral synthesis for symbolic analysis and design of a lossless prototype circuit. The third program, for layout generation of current mirrors, can be used for silicon assembly of an SI filter. In the presented synthesis method current mirrors are basic parameterized cells of such filters. The current mirrors are composed of transistors where width-to-length ratios of channels are determined at the behavioral synthesis stage of the filter.