Amplifiers – Signal feedback – Phase shift means in loop path
Patent
1986-09-22
1988-11-08
Mullins, James B.
Amplifiers
Signal feedback
Phase shift means in loop path
307520, 328167, 330306, H03F 134
Patent
active
047836350
ABSTRACT:
A low pass filter circuit for filtering out high frequency AC components from an electric signal including a DC component and possibly low frequency AC components is disclosed herein. This circuit includes a first order, low pass RC filter network, free of any active elements, for receiving a signal at an input and passing the entire DC component and any low frequency AC components present in the signal to an output. The circuit also includes circuitry utilizing at least some active components and a predetermined transfer function for filtering out high frequency components in the signal over a predetermined, relatively narrow roll-off frequency band. This latter circuitry cooperates with the RC network so that the operation of its active elements does not act on the DC component of the signal and therefore does not affect the amplitude of the DC component as it appears at the output.
REFERENCES:
patent: T904030 (1972-11-01), Davie
patent: 3701952 (1972-10-01), Miller et al.
patent: 4122398 (1978-10-01), Dunn
Geffe, "RC-Amplifier Resonators for Active Filters", IEEE Transactions on Circuit Theory, vol.-CT-15, No. 4, Dec. 1968, pp. 415-419.
Linear Technology Corporation
Mullins James B.
LandOfFree
Low pass 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 Low pass filter circuit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Low pass filter circuit will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-465451