Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
Patent
1992-07-02
1994-06-28
Mullins, James B.
Electrical transmission or interconnection systems
Nonlinear reactor systems
Parametrons
365208, 365220, G01R 1900, G11C 700
Patent
active
053250010
ABSTRACT:
A static RAM cell having first and second differentially connected lines reads binary information stored in the cell by providing a current through the cell and the first line to read a binary "1" or through the cell and the second line to read a binary "0". First and second transistors in a pre-amplifier respectively connected in the first and second lines provide outputs respectively representing a binary "1" and a binary "0". The first and second transistors pass control currents respectively through third and fourth transistors to produce bias currents in one of the first and second transistors when reading currents are not passing through that transistor and the cell. The control of the third and fourth transistors increases the frequency at which information is read from the cell and is amplified. In this improvement, the bias current in the line providing an output at each instant is reduced by respectively providing a negative feedback from the outputs (e.g. the drains) of the first and second transistors to control the inputs (e.g. the gates) of the third and fourth transistors. This reduces power losses while increasing the frequency at which binary information is read from the cell. The frequency may be further increased by including an impedance in the control circuitry to the third and fourth transistors to delay the response of the third and fourth transistors. Pairs of pre-amplifiers for different bit and word lines may be connected in parallel to provide further increases in the frequency response and further power losses.
REFERENCES:
patent: 4553053 (1985-11-01), Ong et al.
patent: 4813023 (1989-03-01), Brunolli
patent: 4949306 (1990-08-01), Nakagome
patent: 5189322 (1993-02-01), Chan et al.
Donofrio et al., "Differential Shunt Feedback Sense Amplifier", IBM Technical Disclosure Bulletin, vol. 12, No. 12, May, 1970, p. 2123.
Brooktree Corporation
Mullins James B.
Roston Ellsworth R.
Schwartz Charles H.
LandOfFree
Negative feedback sense pre-amplifier does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Negative feedback sense pre-amplifier, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Negative feedback sense pre-amplifier will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2379326