Amplifier with deterministic noise cancellation and method thereof
AssigneeRealtek Semiconductor Corp.
InventorChia-Liang (Leon) Lin
Life of this patent
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Abstract
In one embodiment, a circuit comprising a passive input network of an input impedance configured to couple an input voltage to a first circuit node; an adaptive current source configured to output an adaptive bias current to the first circuit node; a cascode device controlled by a control voltage and configured to receive a sum current from the first circuit node and output an output current to a second circuit node; and a load network of a load impedance configured to provide termination to the second circuit node, wherein the adaptive bias current is dynamically adapted to track a deterministic noise component in the input voltage.
Claims20
A circuit comprising:
- a passive input network of an input impedance configured to couple an input voltage to a first circuit node;
- an adaptive current source configured to output an adaptive bias current to the first circuit node;
- a cascode device controlled by a control voltage and configured to receive a sum current from the first circuit node and output an output current to a second circuit node;
- and
- a load network of a load impedance configured to provide termination to the second circuit node, wherein the adaptive bias current is dynamically adapted to track a deterministic noise component in the input voltage.
A circuit comprising:
- a first passive input network of a first input impedance configured to couple a first input voltage to a first circuit node;
- a second passive input network of a second input impedance configured to couple a second input voltage to the first circuit node;
- an adaptive current source configured to output an adaptive bias current to the first circuit node;
- a cascode device controlled by a control voltage and configured to receive a sum current from the first circuit node and output an output current to a second circuit node;
- and
- a load network of a load impedance configured to provide termination to the second circuit node, wherein the adaptive bias current is dynamically adapted to track a deterministic noise component in one of the first input voltage and the second input voltage.
A method comprising:
- receiving an input voltage;
- coupling the input voltage, using a passive input network, to a first circuit node;
- providing an adaptive bias current to the first circuit node;
- passing a sum current from the first circuit node to a second circuit node using a cascode device controlled by a control voltage;
- terminating the second circuit node with a load network;
- and
- adapting the adaptive bias current in accordance with a deterministic noise in the input voltage.
A method comprising:
- receiving a first input voltage;
- coupling the first input voltage, using a first passive input network, to a first circuit node;
- receiving a second input voltage;
- coupling the second input voltage, using a second passive input network, to the first circuit node;
- providing an adaptive bias current to the first circuit node;
- passing a sum current from the first circuit node to a second circuit node using a cascode device controlled by a control voltage;
- terminating the second circuit node with a load network;
- and
- adapting the adaptive bias current in accordance with a deterministic noise in one of the input first input voltage and the second input voltage.
Dependencies are inferred from the claim text.