US Patent 6946911 Temperature-insensitive bias circuit for high-power amplifiers
Patent 6946911 was granted and assigned to Skyworks Solutions on September, 2005 by the United States Patent and Trademark Office.
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An exemplary bias circuit is coupled to an amplifier. The bias circuit comprises a first bipolar transistor, a second bipolar transistor and a third bipolar transistor. The first bipolar transistor has a base connected to a first node, and the first node is connected to a reference voltage through a first resistor. The second bipolar transistor has a base connected to the first node. The third bipolar transistor has a collector connected to the first node and a base connected to an emitter of the first bipolar transistor at a second node. An emitter of the second bipolar transistor is connected to a base of a fourth bipolar transistor associated with the amplifier, and the second bipolar transistor does not have a resistor connected to the emitter of the second bipolar transistor.
US Patent 6946911 Temperature-insensitive bias circuit for high-power amplifiers
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