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The paper presents an implementation of continuous time CMOS analog filters for audio frequency range suited for low voltage supply. The circuit is based on CMOS inverter working in weak inversion region. As an example application a filter with characteristics desired for non-uniform sampling delta modulator (NSDM) based audio codec is presented. System considerations, filter synthesis, simulation...
Zaprezentowano rozwiązania układowe analogowych bloków funkcjonalnych zbudowane wyłącznie z najprostszych struktur inwerterów CMOS lub ich niewielkich modyfikacji. Dzięki temu omawiane układy charakteryzują się dobrymi właściwościami częstotliwościowymi oraz najmniejszymi z możliwych wymaganiami dotyczących napięcia zasilającego części analogowej układów CMOS VLSI. Rozważania zilustrowano wynikami...
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