Amplifiers – With semiconductor amplifying device – Including differential amplifier
Patent
1989-04-07
1990-05-01
Mottola, Steven
Amplifiers
With semiconductor amplifying device
Including differential amplifier
330270, 330273, H03F 326, H03F 345
Patent
active
049222082
ABSTRACT:
In an output stage of an operational amplifier comprising first and second NPN output transistors a circuit is coupled between the positive supply conductor and the collector of the first NPN transistor for providing a boosted base current drive thereto as a function of the load current sourced from the emitter of the first transistor to the output of the operational amplifier. The circuit senses the collector current flowing through the first transistor for increasing the base current drive thereto as the collector current increases.
REFERENCES:
patent: 4499431 (1985-02-01), Otala
Susak David M.
Vyne Robert L.
Bingham Michael D.
Motorola Inc.
Mottola Steven
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