This thesis presents an automatic tuning circuit that it is focused on compensation for the filter¡¦s frequency error resulting from the variation of fabrication process, supply voltage and temperature.
We utilize a tunable operational transconductance amplifier and a capacitor to form a single-time constant circuit (STC). When we input a reference signal to this circuit, the output of STC circuit can produce a controllable delay time clock. The tuning circuit uses the constant delay time to tune the frequency of the filter.
The design of the STC circuit is simple and it has less chip area. All circuits are designed by using the parameters of TSMC 0.35um mixed signal process, and the supply voltage is 3V. The simulation result shows that the filter¡¦s 3-dB frequency error can be controlled by less than 7% as the filter is under the condition of over a range of supply voltages(¡Ó10¢H), operating temperatures(-20 ¢Jto 70¢J ) and five models of SPICE model.
| Identifer | oai:union.ndltd.org:NSYSU/oai:NSYSU:etd-0729109-173637 |
| Date | 29 July 2009 |
| Creators | Su, Ming-chiuan |
| Contributors | Ko-Chi Kuo, Chia-Hsiung Kao, Tzyy-Sheng Horng |
| Publisher | NSYSU |
| Source Sets | NSYSU Electronic Thesis and Dissertation Archive |
| Language | English |
| Detected Language | English |
| Type | text |
| Format | application/pdf |
| Source | http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0729109-173637 |
| Rights | not_available, Copyright information available at source archive |
Page generated in 0.0012 seconds