System and method for reducing second order distortion in electronic circuits
AssigneeMicrotune (Texas), L.P.
InventorsGirish Patel, James M. Douglass
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Abstract
System and methods for reducing the effects of imbalance between input signals in a gain controlled differential amplifier are shown. Distortion in the amplifier is reduced by modulating the gain control input based upon detected differences between the signal levels of the differential input signal source.
Claims66
Circuitry for mitigating the effects of an imbalanced input, said circuitry comprising:
- sensing circuitry for providing at least one control signal, said control signal proportional to a sensed imbalance of said input;
- and
- circuitry for combining said control signal with an adjustment signal, said adjustment signal operative for modifying, at least in part, further processing of said input signal as a function of said sensed imbalance.
A differential amplifier adapted to mitigate second order distortion, said amplifier comprising:
- circuitry for controlling at least one operational aspect of said amplifier in response to received adjustment signals;
- and
- circuitry for modifying said received adjustment signals based upon detected signal level differences between input signals to said differential amplifier.
A system for reducing the effect on an electronic circuit caused by imbalances between input signals to said electronic circuit, said system comprising:
- means for continuously sensing said imbalances and for providing an imbalance signal proportional to said sensed imbalance;
- and
- means for adding said imbalance signal to a control signal utilized to control an operational aspect of said electronic circuit.
A method for reducing the effect on an electronic circuit caused by imbalances between input signals to said electronic circuit, said method comprising:
- continuously sensing said imbalances;
- providing an imbalance signal proportional to said sensed imbalance;
- and
- adding said imbalance signal to a control signal utilized to control an operational aspect of said electronic circuit.
A method for controlling a differential amplifier, said method comprising:
- controlling an operational aspect of said amplifier in response to received adjustment signals;
- and
- modifying said received adjustment signals based upon detected signal level differences between input signals to said differential amplifier.
A method for mitigating effects of imbalanced input signals, said method comprising:
- providing at least one control signal, said control signal proportional to a sensed imbalance between said input signals;
- and
- combining said control signal with an adjustment signal, said adjustment signal operative for modifying, at least in part, further processing of said input signals.
Circuitry for mitigating distortion associated with input signals which arrive unbalanced at a differential amplifier, said circuitry comprising:
- means for providing at least one control signal, said control signal proportional to a sensed imbalance between said input signals;
- and
- means for combining said control signal with a gain adjustment signal, said gain adjustment signal operative for modifying, at least in part, further processing of said input signals.
Dependencies are inferred from the claim text.