Amplifiers – With semiconductor amplifying device – Including differential amplifier
Patent
1980-03-06
1982-10-12
Tokar, Michael J.
Amplifiers
With semiconductor amplifying device
Including differential amplifier
330279, H03F 345
Patent
active
043541615
ABSTRACT:
An H.F. broadband amplifier comprises a transistorized differential amplifier input stage the potential of which is set by a voltage divider circuit, and an additional transistor for attenuating a.c. signals present at the input of the amplifier in its turned off stage, the emitter-collector parts of the additional transistor being connected into a collector current circuit of a transistor of the differential amplifier, and the base of the additional transistor being operated in base connection, and switched to a reference potential of low resistence in HF terms to reduce the capacitative coupling between input, and output of the amplifier circuit.
REFERENCES:
patent: 3900801 (1975-08-01), Furuno
patent: 3927382 (1975-12-01), Oki
Hasch Gunter
Minner Willy
LICENTIA Patent-Verwaltungs-G.m.b.H.
Tokar Michael J.
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