Multi-voltage biasing system with over-voltage protection
AssigneeAnalog Devices, Inc.
InventorsGeorges El Bacha, Stuart Patterson, Ara Arakelian
Life of this patent
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Abstract
A multi-voltage biasing system with over voltage protection has an amplifier with a stage including at least one output device and one cascode protection device having a predetermined maximum recommended voltage; a biasing network is selectively responsive to a plurality of different supply voltages at least one of which is higher than the maximum recommended voltage for providing to the stage a bias voltage to operate the cascode device and output device below their maximum recommended voltages.
Claims25
A multi-voltage biasing system with over-voltage protection comprising:
- an amplifier having a stage including at least one output device and one cascode protection device, each device having a predetermined maximum recommended voltage, the stage being powered by one of a plurality of different supply voltages at least one of which is higher than said maximum recommended voltage;
- and
- a biasing network powered by the one of the different supply voltages, the biasing network providing to said stage a bias voltage to operate said cascode device and output device below their maximum recommended voltages.
A dual power supply microphone biasing system comprising:
- an amplifier having an input stage and an output stage including at least one output device and one cascode protection device, each device having a predetermined maximum recommended voltage, the output stage being powered by one of a plurality of different supply voltages at least one of which is higher than said maximum recommended voltage;
- and
- a biasing network powered by the one of the different supply voltages, the biasing network providing to said output stage a bias voltage to operate said cascode device and output device below their maximum recommended voltages.
A multi-voltage system with over-voltage protection comprising:
- an amplifier having a stage including at least one output device and one cascode protection device, each device having a predetermined maximum recommended voltage, the stage being powered by one of a plurality of different supply voltages at least one of which is higher than said maximum recommended voltage;
- and
- a biasing network powered by the one of the different supply voltages the biasing network providing to said stage a bias voltage to operate said cascode device and output device below their maximum recommended voltages.
Dependencies are inferred from the claim text.