Electrical computers: arithmetic processing and calculating – Electrical digital calculating computer – Particular function performed
Reexamination Certificate
2011-08-02
2011-08-02
Ngo, Chuong D (Department: 2193)
Electrical computers: arithmetic processing and calculating
Electrical digital calculating computer
Particular function performed
C708S443000, C708S707000
Reexamination Certificate
active
07991814
ABSTRACT:
The invention includes a novel differentiator cell, a novel resample unit cell, and precision synchronization circuitry to ensure proper timing of the circuits and systems at the anticipated ultra-high speed of operation. The novel differentiator cell includes circuitry for combining a carry input signal, a data bit signal and the output signal of a NOT cell and applying the signals as distinct and separate pulses to the input of a toggle flip-flop (TFF) for producing an asynchronous carry output and a clocked data output. The novel differentiator cells can be interconnected to form a multi-bit differentiator circuit using appropriate delay and synchronization circuitry to compensate for delays in producing the carry output of each cell which is applied to a succeeding cell. The novel resample cell includes a non-destructive reset-set flip-flop (RSN) designed to receive a data bit, at its set input, at a slow clock rate, which data is repeatedly read out of the RSN at a fast clock rate, until the RSN is reset. The novel differentiator and resampler cells can be interconnected, for example, to form the differentiator and up-sampling sections of a digital interpolation filter (DIF). Also, the relative clocking of bit slices (columns) in such a DIF may be achieved by using the fast clock signal to synchronize the slow clock which controls data entry. The circuits of the invention can be advantageously implemented with Josephson Junctions in rapid-single-flux-quantum (RSFQ) logic.
REFERENCES:
patent: 3784854 (1974-01-01), Herrell
patent: 5818743 (1998-10-01), Lee et al.
patent: 6581082 (2003-06-01), Opsahl
patent: 7392277 (2008-06-01), Fletcher
patent: 2008/0129368 (2008-06-01), Furuta et al.
Filippov Timur V.
Mukhanov Oleg A.
Hypres, Inc
Ngo Chuong D
Schanzer, Esq. Henry I.
LandOfFree
Ultra fast circuitry for digital filtering does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Ultra fast circuitry for digital filtering, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ultra fast circuitry for digital filtering will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2682213