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US 7,733,163 B1Granted
Bias current compensation device and method
AssigneeMarvell International Ltd.
InventorKan Li
Life of this patent
Estimating the term…
Abstract
A compensation device that can include a bias-able device, a bias circuit that provides the bias-able device with a bias current, a signal conditioner selectively coupled to the bias-able device, and an emulator. The signal conditioner and emulator can divert current from the bias-able device in an operational and calibration mode, respectively. In calibration mode, the emulator generates a compensation current that is combined with a sense current so that the sense current equals the bias current.
Claims48
A compensation device, comprising:
- a bias-able device;
- a bias circuit that provides the bias-able device with a bias current, the bias current being a sense current less a first current;
- a signal conditioner selectively coupled to the bias-able device that, when in an operational mode, is coupled to the bias-able device and diverts the first current from the bias-able device;
- and
- an emulator that is selectively coupled to the bias-able device that, when in a calibration mode, is coupled to the bias-able device and diverts the first current from the bias-able device, the emulator generates a compensation current that is combined with the sense current so that the sense current equals the bias current.
2 more elements
A compensation method, comprising:
- biasing a bias-able device with a bias current, the bias current being a sense current less a first current;
- in a calibration mode:
- diverting the first current from the bias-able device to an emulator that emulates a signal conditioner;
- generating a compensation current that is based on the first current;
- and
- combining the compensation current with the sense current so that the sense current equals the bias current;
- and
- in an operational mode:
- diverting the first current from the bias-able device to the signal conditioner.
6 more elements
Dependencies are inferred from the claim text.