Amplifier with non-linearity cancellation
AssigneeHuawei Technologies Co., Ltd.
InventorYaqi Hu
Life of this patent
Estimating the term…
Abstract
An amplifier circuit includes a primary differential amplifier circuit connected to receive a differential input and provide a primary differential output with a first non-linearity. A secondary differential amplifier circuit is connected to receive the differential input. The secondary differential amplifier circuit is configured to generate a secondary differential output with a second non-linearity. The secondary differential output and the primary differential output are coupled together with opposing polarities such that the second non-linearity cancels out at least the first non-linearity.
Claims7
An amplifier circuit, comprising:
- a primary differential amplifier circuit connected to receive a differential input and provide a primary differential output with a first non-linearity;
- and
- a secondary differential amplifier circuit connected to receive the differential input, the secondary differential amplifier circuit configured to generate a secondary differential output with a second non-linearity, the secondary differential output and the primary differential output coupled together with opposing polarities such that the second non-linearity cancels out at least a portion of the first non-linearity, the secondary differential amplifier circuit including variable resistors and a secondary current source comprising a variable current source for tuning non-linearity of the secondary differential amplifier circuit.
Dependencies are inferred from the claim text.