Amplifier device capable of realizing high slew rate with low po

Details Amplifier device capable of realizing high slew rate with low po Amplifier device capable of realizing high slew rate with low po

1993-04-09

1995-11-28

Mottola, Steven

Amplifiers

With semiconductor amplifying device

Including differential amplifier

330261, H03F 345

Patent

active

054711711

ABSTRACT:
An amplifier device capable of performing an efficient amplifying operation with a low power consumption includes an amplifier circuit at least having an input amplifier stage which amplifies a level change of an input signal to output an amplified current, and an output stage which outputs the amplified current as a driving output to a capacitive load; a primary bias circuit for ordinarily supplying a constant and main bias current to the amplifier circuit; a determination element for determining a change condition of the level change of the input signal, which is supplied from the input amplifier stage, so as to generate a control signal corresponding to said change condition; and a driving capability increase element as a secondary bias circuit for increasing a bias current in order to increase the driving output supplied to the capacitive load when the control signal is input.

REFERENCES:
patent: 4383223 (1983-05-01), Ulmer
patent: 4471321 (1984-09-01), Bowers
patent: 4730168 (1988-03-01), Senderowicz
patent: 4881045 (1989-11-01), Dillman
"Analog MOS Integrated Circuits For Signal Processing", Roubik Gregorian et al., John Wiley & Sons 1986, pp. 257 (final paragraph) to 259.

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