Amplifiers – With semiconductor amplifying device – Including differential amplifier
Patent
1994-05-24
1996-10-15
Mullins, James B.
Amplifiers
With semiconductor amplifying device
Including differential amplifier
330254, 330255, 330257, 330258, H03F 345
Patent
active
055658156
ABSTRACT:
A balanced current amplifier mirrors either a fully differential or single ended input signal into common output circuits in a manner to generate a fully differential output signal without any d.c. bias. Input signal nodes are maintained at a desired voltage by circuit elements other than those of the current mirror circuits, thus freeing the current mirroring elements from having to be sized for this purpose. The sizes of the output transistors are adjustable in order to set the gain of the circuit. In addition to amplifier circuits, a full-wave rectifier, a comparator, and a filter, all operating with current signals, are described. A single circuit module may include all of these circuits with a user provided the capability to program the module to perform any one or more of these functions.
REFERENCES:
patent: 3452289 (1969-03-01), Ryan
patent: 3988595 (1976-07-01), Eatock
patent: 4575643 (1986-03-01), Sakai
patent: 4829266 (1989-05-01), Pernici et al.
patent: 4887047 (1989-12-01), Somerville
patent: 4912393 (1990-03-01), Anderson et al.
patent: 5043674 (1991-08-01), Bonaccio et al.
patent: 5063356 (1991-06-01), Voorman
patent: 5146179 (1992-09-01), Carley et al.
IMP Inc.
Mullins James B.
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