Amplifiers – With semiconductor amplifying device – Including differential amplifier
Patent
1993-01-27
1994-08-09
Mullins, James B.
Amplifiers
With semiconductor amplifying device
Including differential amplifier
330311, H03F 345
Patent
active
053370104
ABSTRACT:
In a wide-band amplifier circuit, a third and a fourth transistors are cascaded externally with a first and a second transistors within an integrated circuit which are connected each to output terminals by collectors through the output terminals, and a collector current flowing in the third transistor is transformed into an output voltage by an external resistance. A load capacity parasitic on the output terminal of the integrated circuit is driven by the collector current, thus a possibility of a frequency characteristic deteriorating due to an influence of the load capacity is avoided, and an operating zone can further be expanded to a high frequency band as compared with a prior art one.
REFERENCES:
patent: 4323854 (1982-04-01), Hester
patent: 4928073 (1990-05-01), Arai et al.
Mullins James B.
Sony Corporation
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