Resistorless power amplifier
AssigneeAdvanced Semiconductor Engineering, Inc.
InventorJaw-Ming Ding
Life of this patent
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Abstract
The present disclosure relates to a power amplifier circuit including a current source, a power control circuit, a current mirror and an output circuit. The current source circuit includes a first transistor and a second transistor. A source of the first transistor is connected to a drain of the second transistor and a gate of the first transistor is connected to a source with the second transistor. The power control circuit is connected to a gate of the second transistor. The current mirror circuit is connected to the gate of the first transistor and a source of the second transistor. The output circuit is connected to the current mirror circuit.
Claims20
A power amplifier circuit comprising:
- a current source circuit comprising a first transistor and a second transistor, a source of the first transistor connected to a drain of the second transistor and a gate of the first transistor connected to a source of the second transistor;
- a power control circuit connected to a gate of the second transistor;
- a current mirror circuit connected to the gate of the first transistor and the source of the second transistor;
- and
- an output circuit connected to the current mirror circuit,
- wherein the power control circuit is configured to receive a first voltage input and to control a current of the output circuit based on the first voltage input.
A power amplifier circuit comprising:
- a current source circuit;
- a power control circuit comprising a first transistor and a second transistor, the first transistor comprising a drain connected to a first voltage input, a gate connected to ground and a source connected to a gate of the second transistor;
- a current mirror circuit comprising a first node connected to the current source circuit and a second node connected to a source of the second transistor;
- and
- an output circuit connected to the current mirror circuit.
A power amplifier circuit comprising:
- a current source circuit configured to generate a first current;
- a current mirror circuit connected to the current source circuit and configured to generate a second current in response to the first current;
- a power control circuit connected to the current source circuit and the current mirror circuit and configured to receive a first voltage;
- and
- an output circuit connected to the current mirror circuit and configured to generate a third current, wherein the third current varies in response to the first voltage.
Dependencies are inferred from the claim text.