Amplifiers – Signal feedback – Plural amplifier channels
Patent
1981-04-13
1983-11-22
Mullins, James B.
Amplifiers
Signal feedback
Plural amplifier channels
330107, 330124R, H03F 134, H03F 368
Patent
active
044172141
ABSTRACT:
A general purpose active filter which can be fabricated as a single, monolithic IC. The IC includes two independent filter building blocks. Each filter block includes a pair of serially connected summers and a pair of serially connected switched capacitor positive integrators connected to the serial output of the summers. The IC further includes clock interface circuitry for receiving and conditioning first and second external clock signals. The interface circuitry drives the switches of the positive integrators of each filter block with one of the first and second conditioned clock signals. A plurality of input and output leads are interconnected with the components of each filter block to permit the filter blocks to be separately configured to perform various second order filter functions. The filter blocks may be tuned according to external resistance ratios and/or according to the frequencies of the external clock signals.
REFERENCES:
patent: 4306197 (1981-12-01), Gregorian
Girling et al., "Active Filters: 7. The Two-Integrator Loop", Wireless World, Feb. 1970, pp. 76-80.
Martin, "Improved Circuits for the Realization of Switched Capacitor Filters", Proceedings of 1979 ISCAS, Jul. 1979, pp. 756-759.
Lum Sammy S.
Sevastopoulos Stylianos G.
Mullins James B.
National Semiconductor Corporation
LandOfFree
Monolithic IC general purpose active filter does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Monolithic IC general purpose active filter, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Monolithic IC general purpose active filter will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1817220