Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – Unwanted signal suppression
Patent
1999-04-26
2000-12-05
Le, Dinh T.
Miscellaneous active electrical nonlinear devices, circuits, and
Specific identifiable device, circuit, or system
Unwanted signal suppression
327557, 327556, 330306, G05F 100
Patent
active
061572489
ABSTRACT:
An active filter circuit (a band stop filter type or a band pass filter type) having high Q value and high efficiency and which is suitable for integration has an input signal vi inputted from the input terminal supplied to the non-inverting input terminal of the first differential amplifier. The output terminal of the first differential amplifier is connected to the non-inverting input terminal of the second differential amplifier, and the first capacitor 3 is connected between this connection line and the alternate current ground. An output of the second differential amplifier is connected to the non-inverting input terminal of the first differential amplifier via the second capacitor, the inverting input terminal of the first differential amplifier, the inverting input terminal of the second differential amplifier 4, the non-inverting input terminal of the third differential amplifier, the output terminal of the third differential amplifier and the output terminal of the active filter circuit. An inverting input terminal of the third differential amplifier is connected to alternate current ground. The output of the second differential amplifier becomes the output signal vo of the active filter circuit.
REFERENCES:
patent: 5317217 (1994-05-01), Rieger et al.
Minami Yoshihisa
Yasuda Masaru
Le Dinh T.
Matsushita Electric - Industrial Co., Ltd.
LandOfFree
Active filter circuit does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Active filter circuit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Active filter circuit will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-965213