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Realisation of low-voltage square-root-domain all-pass filters |
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| รหัสดีโอไอ | |
| Creator | 1. Farooq A. Khanday 2. Nisar A. Shah |
| Title | Realisation of low-voltage square-root-domain all-pass filters |
| Publisher | Maejo University |
| Publication Year | 2556 |
| Journal Title | Maejo International Journal of Science and Technology |
| Journal Vol. | 7 |
| Journal No. | 3 |
| Page no. | 422 |
| Keyword | analog integrated circuits,companding filters,current-mode circuits,squareroot-domain filters,all-pass filters |
| ISSN | 1905-7873 |
| Abstract | Novel low-voltage first-order and second-order square-root-domain all-pass filters derived systematically by means of transfer function decomposition and state-space synthesis techniques are proposed. The employment of only a few geometric-mean cells and grounded capacitors permits the circuits to absorb shunt parasitic capacitances, which is desirable for production in monolithic form. The circuits enjoy the features of electronic adjustment of frequency characteristics, wider dynamic range and low-voltage environment operation. The filters are employed to design high-order all-pass filters using cascade approach. First-order low-pass and second-order band-pass filters, being the inherited building blocks of the proposed low-order all-pass filters are also discussed. The behaviour of the filters is evaluated through simulations using Taiwan semiconductor manufacturing company 0.25 ?m level-3 complementary metal oxide semiconductor process parameters, where the most important performance factors are considered. |
