System and method for improved bias matching
AssigneeTexas Instruments Incorporated
InventorsAlan Lee Varner, Paul Damitio
Life of this patent
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Abstract
Systems and methods to improve bias matching (e.g., for a current feedback amplifier) are described. A compensation signal is combined with one or more bias signals to mitigate mismatch between the bias signals. The compensation signal is generated to correspond to the mismatch between the bias signals. This approach can be implemented to improve performance of an associated amplifier, such as by reducing offset at an input of a portion of the amplifier (e.g., an input buffer) that is biased by the bias signals.
Claims26
A system for providing substantially matched bias signals, comprising:
- a signal compensator that provides a compensation signal that combines with one of first and second bias signals to mitigate a difference between the first and second bias signals, the signal compensator provides the compensation signal based on third and fourth signal generated to emulate the first and second bias signals, respectively.
An amplifier system comprising:
- an input buffer having at least one input that receives an input signal, the input buffer is biased by respective signals received at first and second bias inputs thereof;
- and
- a signal compensator that provides a compensation signal to at least one of the first and second bias inputs so that the respective signals received by the input buffer at the first and second bias inputs substantially match each other, the compensation corresponds to a difference between first and second bias signals.
A system for providing substantially matched bias signals, comprising:
- means for emulating first and second bias signals that are provided to bias an associated circuit;
- and
- means for providing a compensation signal that combines with at least one of first and second bias signals to mitigate a difference between the first and second bias signals, the compensation signal being provided based on third and fourth signals provided by the means for emulating.
A method for improving bias matching of an amplifier, comprising:
- providing first and second bias signals at first and second bias inputs of an amplifier;
- generating third and fourth signals to emulate the first and second bias signals;
- and
- providing a compensation signal to at least one of the first and second bias inputs based on the third and fourth signals, such that aggregate signals at each of the first and second bias inputs substantially match.
Dependencies are inferred from the claim text.