Amplifiers – Combined with automatic amplifier disabling switch means
Patent
1995-12-19
1997-03-04
Mullins, James B.
Amplifiers
Combined with automatic amplifier disabling switch means
330253, 330255, 330261, H03F 345
Patent
active
056083505
ABSTRACT:
An operational amplifier includes a first output transistor connected between a higher potential power source terminal and an output terminal and a second output transistor connected between a lower potential power source terminal and the output terminal. The first and second output transistors are on/off controlled by a sequence control circuit according to a control signal. The sequence control circuit includes a first inverter which produces a first internal control signal for on/off controlling the first output transistor and a second inverter which produces a second internal control signal for on/off controlling the second output transistor. When the control signal changes from a high to a low level, the first internal control signal is inverted after the inversion of the second internal control signal. When the control signal changes from a low to a high level, the second internal control signal is inverted after the inversion of the first internal control signal. The transient voltage outputted from the output terminal when the operational amplifier changes from its active to inactive state becomes identical to that when the operational amplifier changes from its inactive to active state.
REFERENCES:
patent: 4379267 (1983-04-01), Young
Mullins James B.
NEC Corporation
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