Amplifiers – With semiconductor amplifying device – Including push-pull amplifier
Patent
1986-09-15
1988-08-16
Mullins, James B.
Amplifiers
With semiconductor amplifying device
Including push-pull amplifier
330276, H03F 326
Patent
active
047647353
ABSTRACT:
Amplifier for radio frequencies including first and second common-base-connected transistors in push-pull coupling; an input transformer including two identical input windings each in series connection with the emitter of the respective first and second transistor and an input signal; an output transformer having a primary winding divided by a centertap into two identical half windings and having a start and an end terminal respectively connected to the collector of said first and second transistor and being connected to a supply potential at the centertap. The output transformer further includes a secondary winding connected to a load and identical first and second feedback windings in series connection with the respective emitter of said first and second transistor. Each feedback winding is such oriented that a fraction of the output signal is inserted in the input signal in opposite phase thereto for providing negative feedback.
REFERENCES:
patent: 2852675 (1958-09-01), Oliver
patent: 2887532 (1959-05-01), Werner
patent: 3111630 (1963-11-01), Wolcott
patent: 3292094 (1966-12-01), Jones
patent: 3324407 (1967-06-01), Rockwell
Mullins James B.
Sunair Electronics, Inc.
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