Distortion correction loop for amplifier circuits
AssigneeTexas Instruments Incorporated
InventorJohn M. Muza
Life of this patent
Estimating the term…
Abstract
The distortion correction circuit includes: a main amplifier 30 having a first resistor 36 coupled from an output of the main amplifier 30 to a first input of the main amplifier 30, and a second resistor 34 coupled between the first input of the main amplifier 30 and a first input signal node; a correction loop amplifier 32 having an output coupled to a second input of the main amplifier 30, an output of the main amplifier 30 coupled to a first input of the correction loop amplifier 32, a second input of the correction loop amplifier 32 coupled to a second input signal node.
Claims7
A distortion correction circuit comprising:
- a main amplifier having a first resistor coupled between an output of the main amplifier and a first input of the main amplifier, and a second resistor coupled between the first input of the main amplifier and a first input signal node;
- a correction loop amplifier having an output coupled to a second input of the main amplifier, an output of the main amplifier coupled to a negative input of the correction loop amplifier, a positive input of the correction loop amplifier coupled to a second input signal node.
A differential distortion correction circuit comprising:
- a first main amplifier having a first resistor coupled between an output of the first main amplifier and a first input of the first main amplifier, a second resistor coupled between the first input of the first main amplifier and a first input signal node, and a third resistor coupled between a second input of the first main amplifier and a second input signal node;
- a first correction loop amplifier having an output coupled to the second input of the first main amplifier through a fourth resistor, the output of the first main amplifier coupled to a first input of the first correction loop amplifier, a second input of the first correction loop amplifier coupled to the second input signal node;
- a second main amplifier having a fifth resistor coupled between an output of the second main amplifier and a first input of the second main amplifier, a sixth resistor coupled between the first input of the second main amplifier and the second input signal node, and a seventh resistor coupled between a second input of the second main amplifier and the first input signal node;
- a second correction loop amplifier having an output coupled to the second input of the second main amplifier through an eighth resistor, the output of the second main amplifier coupled to a first input of the second correction loop amplifier, a second input of the first correction loop amplifier coupled to the first input signal node.
Dependencies are inferred from the claim text.