Miscellaneous active electrical nonlinear devices – circuits – and – Specific input to output function – Combining of plural signals
Patent
1995-12-21
1998-02-03
Callahan, Timothy P.
Miscellaneous active electrical nonlinear devices, circuits, and
Specific input to output function
Combining of plural signals
327362, 327563, 330257, 330261, G06F 744
Patent
active
057149038
ABSTRACT:
An analog multiplier includes at least a differential output stage formed by a pair of emitter-coupled bipolar transistors. Each transistor of the pair of emitter-coupled bipolar transistors is driven by a predistortion stage having a reciprocal of a hyperbolic tangent transfer function that is attributable to the base currents of the bipolar transistors used in the predistortion stage. The error in the output signal produced by the analog multiplier is compensated by generating replicas of the base currents of the bipolar transistors of the differential output stage and forcing those replica currents on the output node of a respective predistortion stage. Various embodiments that consume different amounts of power are described.
REFERENCES:
patent: 3793480 (1974-02-01), Waehner
patent: 4156283 (1979-05-01), Gilbert
patent: 4563670 (1986-01-01), Stallkamp et al.
patent: 5030924 (1991-07-01), Fritz
IEEE Journal of Solid-State Circuits, vol. sc-19, No. 6, Dec. 1974 New York, US, pp. 364-373, Berrie Gilbert. "A High-Performance Monolithic Multiplier Using Active Feedback".
Gray, et al., "Analysis and Design Of Analog Interated Circuits", 1984, John Wiley & Sons, New York, US pp. 590-600.
Bruccoleri Melchiorre
Cosentino Gaetano
Demicheli Marco
Portaluri Salvatore
Callahan Timothy P.
Consorzio per la Ricerca sulla Microelettronica nel Mezzogiorno
Morris James H.
SGS-Thompson Microelectronics S.r.l.
Wells Kenneth B.
LandOfFree
Low consumption analog multiplier 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 consumption analog multiplier, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Low consumption analog multiplier will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-666289