An integrable 60-Hz notch filter

Previous configurations of continuous-time 60-Hz notch filters were difficult to integrate on a silicon chip because of the large component values required. A new method based on first-order all-pass networks has been introduced that lends itself more to integration. These networks use time constant...

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Veröffentlicht in:	IEEE transactions on circuits and systems. 2, Analog and digital signal processing Analog and digital signal processing, 1999-01, Vol.46 (1), p.74-77
Hauptverfasser:	Casper, B.K., Comer, D.J., Comer, D.T.
Format:	Artikel
Sprache:	eng
Schlagworte:	Active filters Applied sciences Attenuation Band pass filters Capacitors Design. Technologies. Operation analysis. Testing Electronics Exact sciences and technology Frequency Integrated circuit noise Integrated circuits Passband Q factor Resistors Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices Transfer functions
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Beschreibung
Zusammenfassung:	Previous configurations of continuous-time 60-Hz notch filters were difficult to integrate on a silicon chip because of the large component values required. A new method based on first-order all-pass networks has been introduced that lends itself more to integration. These networks use time constant multiplication circuitry to achieve large time constants using resistors and capacitors that can be integrated. With this new configuration, a 60-Hz notch filter with notch attenuation exceeding -60 dB can be implemented on a silicon chip.
ISSN:	1057-7130 1558-125X
DOI:	10.1109/82.749101