Device for balancing the rise and fall slew-rates of an operational amplifier
AssigneeSTMicroelectronics (Grenoble 2) SAS
InventorsPhilippe MAIGE, Pawel FIEDOROW
Life of this patent
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Abstract
An amplifier includes a pair of transistors connected in a differential stage, and a bias current source connected to a common node of the differential stage. A slew-rate compensation circuit is configured to derive from the common node a dynamic compensation current during a phase in which the voltage of the common node varies.
Claims17
1-4. (canceled)
An amplifier comprising:
- a pair of transistors coupled in a differential stage including a common node;
- a bias current source coupled to the common node of the differential stage;
- and
- a slew-rate compensation circuit configured to derive from the common node a dynamic compensation current during a phase in which a voltage of the common node varies.
An amplifier comprising:
- a pair of transistors coupled at a common node;
- a bias current source coupled to the common node;
- and
- a compensation circuit configured to generate a compensation current when a voltage of the common node varies, for balancing slew-rates in the amplifier.
A method of making an amplifier, the method comprising:
- coupling a pair of transistors in a differential stage at a common node;
- coupling a bias current source to the common node of the differential stage;
- and
- coupling a slew-rate compensation circuit to the common node to generate a dynamic compensation current during a phase in which a voltage of the common node varies.
A method of operating an amplifier comprising a pair of transistors coupled in a differential stage at a common node, and a bias current source coupled to the common node of the differential stage, the method comprising:
- balancing slew rates in the amplifier by generating a dynamic compensation current during a phase in which a voltage of the common node varies.
Dependencies are inferred from the claim text.