Amplifiers – With semiconductor amplifying device – Including differential amplifier
Patent
1986-04-28
1987-10-20
Mullins, James B.
Amplifiers
With semiconductor amplifying device
Including differential amplifier
330257, 330291, H03F 345
Patent
active
047017201
ABSTRACT:
An integrated circuit voltage follower buffer amplifier is provided with a feedback capacitor that is coupled to produce positive feedback current that acts to enhance slew rate. In an op amp a polarity sensitive slew rate enhancement acts to correct slew rate asymmetry. Circuits are shown for avoiding assymetry or boosting slew rate of both polarities. In all cases, the positive feedback current is made proportional to the rate of change of the output voltage.
REFERENCES:
patent: 4484147 (1984-11-01), Metz
Mullins James B.
National Semiconductor Corporation
Woodward Gail W.
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