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US 10,951,178 B2Granted
Averaging overcurrent protection
AssigneeSkyworks Solutions, Inc.
InventorsDavid Steven Ripley, Joshua James Caron, Vinay Kundur, Wei Zhang
Life of this patent
Estimating the term…
Abstract
In some embodiments, a power amplification system can comprise a current source configured to provide a bias current, a current mirror configured to mirror the bias current, a comparator configured to compare the mirrored bias current to a threshold current, and a transistor at an output of the comparator. The transistor can be configured to be activated in response to the mirrored bias current exceeding the threshold current.
Claims20
A power amplification system comprising:
- a current source configured to provide a bias current;
- a current mirror configured to mirror the bias current;
- a comparator configured to compare the mirrored bias current to a threshold current;
- and
- a transistor at an output of the comparator, the transistor configured to be activated in response to the mirrored bias current exceeding the threshold current.
2 more elements
A method of managing current in a power amplifier, the method comprising:
- providing a bias current to the power amplifier;
- mirroring the bias current at an output stage of the power amplifier;
- applying the mirrored bias current to a filter network to create a filtered voltage waveform;
- comparing a sensed voltage to a threshold voltage;
- and
- in response to the sensed voltage exceeding the threshold voltage, activating a transistor to redirect at least a portion of the bias current away from the power amplifier.
3 more elements
A circuit comprising:
- a current source configured to provide a bias current;
- a current mirror configured to mirror the bias current;
- a comparator configured to compare the mirrored bias current to a threshold current;
- and
- a transistor at an output of the comparator, the transistor configured to be activated in response to the mirrored bias current exceeding the threshold current.
2 more elements
Dependencies are inferred from the claim text.