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Practical Design Considerations for Switched-Capacitor Filters
| Content Provider | Scilit |
|---|---|
| Author | Huang, Qiuting |
| Copyright Year | 2020 |
| Description | The previous sub-chapters have been concerned with synthesizing discrete-time transfer functions and signal flow graphs, and implementing them with switched-capacitor (SC) building blocks such as stray-insensitive SC integrators. Under the assumption that the switches and op amps used are ideal, the description of an SC filter is nearly the same as that of a digital filter in the sense that signal processing takes place in discrete time which can be described by difference equations. Since each sample in an SC filter is held constant for the clock period, the transfer function of an SC filter is similar to an A/D converter, digital filter plus D/A converter combination. The first-order hold function, which an SC filter has in common with a D/A converter, introduces a 2 sin(ωT/2)/ωT modification to the exact transfer function. This should be taken into account during the filter synthesis if the clock-to-bandedge-frequency ratio is not very $high.^{ 1 }$ Capacitance ratio inaccuracies were mentioned, reflecting the analog nature of SC circuits, to justify the use of ladder structures. Book Name: CRC Handbook of ELECTRICAL FILTERS |
| Related Links | https://content.taylorfrancis.com/books/download?dac=C2006-0-01369-9&isbn=9781003069201&doi=10.1201/9781003069201-20&format=pdf |
| Ending Page | 335 |
| Page Count | 21 |
| Starting Page | 315 |
| DOI | 10.1201/9781003069201-20 |
| Language | English |
| Publisher | Informa UK Limited |
| Publisher Date | 2020-11-12 |
| Access Restriction | Open |
| Subject Keyword | Book Name: CRC Handbook of ELECTRICAL FILTERS Hardware and Architecturee Transfer Function |
| Content Type | Text |
| Resource Type | Chapter |
