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A 4th order fully integrated active RC complex filter with novel automatic tuning systems
- Source :
- Journal of Electronics (China). 24:854-858
- Publication Year :
- 2007
- Publisher :
- Springer Science and Business Media LLC, 2007.
-
Abstract
- This letter introduces a 4th order active RC complex filter with 1.5MHz center frequency and 1MHz bandwidth. The total harmonic distortion of the filter is less than −60dB and the image rejection ratio is greater than 60dB. A novel technique is also proposed in this letter to automatically adjust the variation of the time constant. The advantages of the proposed method are its high precision and simplicity. Using 5bits control words, the tuning error is less than ±1.6%.
Details
- ISSN :
- 19930615 and 02179822
- Volume :
- 24
- Database :
- OpenAIRE
- Journal :
- Journal of Electronics (China)
- Accession number :
- edsair.doi...........214262a3e43884a3f07bb406bba990da