Amplifiers – With semiconductor amplifying device – Including temperature compensation means
Patent
1976-03-29
1978-06-27
Dahl, Lawrence J.
Amplifiers
With semiconductor amplifying device
Including temperature compensation means
315389, 330263, 330293, H03F 132
Patent
active
040978150
ABSTRACT:
An amplifier circuit suitable for use as a video amplifier in a color television circuit for driving the variable impedance load provided by a color television picture tube, in which the load impedance of the amplifier element of the circuit is also made variable. This is achieved, in one embodiment by using as the output stage of the amplifier two transistors with a complementary symmetrical configuration so that one is always substantially cut-off while the other conducts. In another embodiment a transistor in common collector configuration acts as the amplifier element and its emitter from which the output of the amplifier is taken is connected by a diode to the collector of a transistor which feeds the base of the common collector transistor.
REFERENCES:
patent: 3215851 (1965-11-01), Warnock
patent: 3529252 (1970-09-01), Long
patent: 3781589 (1971-11-01), Brockman
patent: 3825849 (1974-07-01), Linder
patent: 3939380 (1976-02-01), Peer
Dahl Lawrence J.
Indesit Industria Elettrodomestici Italiana S.p.A.
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