Slew rate speed-up circuit

Details Slew rate speed-up circuit Slew rate speed-up circuit

1991-09-06

1993-06-29

Ng, Jin F.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307355, H03K 522

Patent

active

052237532

ABSTRACT:
In an operational amplifier or a comparator, a slew rate speed-up circuit improving the slew rate, without added power consumption, is disclosed. In a preferred embodiment, an operational amplifier, having one differential amplifier and a first pull-up transistor 10 having a gate connected to an output terminal 23 of the differential amplifier, includes a first output terminal 25, a second pull-up transistor 9 having a gate connected to the output terminal 23 of the differential amplifier and having a channel connected between a power supply voltage terminal and the first output terminal, a second output terminal 26 connected to one end of the channel of the first pull-up transistor 10, a current regulating means 30, connected between the first output terminal and the second output terminal, having one common current path, one pull-up current path and one pull-down current path, a first pull-down transistor 11 having a channel connected between the second output terminal and a ground voltage terminal, and a second pull-down transistor 8 having a channel connected between the first output terminal and the ground voltage terminal.

REFERENCES:
patent: 4464588 (1984-08-01), Wieser
patent: 4614882 (1986-09-01), Parker et al.
patent: 4636665 (1987-01-01), McLaughlin
patent: 4906871 (1990-03-01), Iida

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