Operational amplifier
AssigneeHimax Technologies Limited
InventorsShih-Yang Liu, Chen-Tung Lee
Life of this patent
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Abstract
An operational amplifier (OPA) includes an output stage composed of a P-type output transistor and an N-type output transistor connected in series between a power supply and ground, the N-type output transistor being controlled by a first control voltage and the P-type output transistor being controlled by a second control voltage; a first leakage eliminating circuit configured to prevent a sinking current through the N-type output transistor from entering the ground when an input voltage rises from a low voltage level to a high voltage level; and a second leakage eliminating circuit configured to prevent a sourcing current through the P-type output transistor from entering a load when the input voltage falls from the high voltage level to the low voltage level.
Claims14
An operational amplifier (OPA), comprising:
- an output stage composed of a P-type output transistor and an N-type output transistor connected in series between a power supply and ground, the N-type output transistor being controlled by a first control voltage and the P-type output transistor being controlled by a second control voltage;
- a first leakage eliminating circuit configured to prevent a sinking current through the N-type output transistor from entering the ground when an input voltage rises from a low voltage level to a high voltage level;
- and
- a second leakage eliminating circuit configured to prevent a sourcing current through the P-type output transistor from entering a load when the input voltage falls from the high voltage level to the low voltage level.
Dependencies are inferred from the claim text.