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US 12,119,791 B2Granted
Low noise amplifier
AssigneeNordic Semiconductor ASA
InventorsJarkko Jussila, Pete Sivonen
Life of this patent
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Abstract
A low noise amplifier comprising a first transconductance amplifier arranged to receive an input voltage at its input terminal and to generate an output current at its output terminal. A second transconductance amplifier is arranged such that its input terminal is connected to the input terminal of the first transconductance amplifier, and such that the output terminal of the second transconductance amplifier is connected to the input terminal of the second transconductance amplifier via a capacitive feedback network (C1).
Claims19
A low noise amplifier comprising:
- a first transconductance amplifier having an input terminal and an output terminal, said first transconductance amplifier being arranged to receive an input voltage at its input terminal and to generate an output current at its output terminal;
- a second transconductance amplifier having an input terminal and an output terminal, said second transconductance amplifier being arranged such that:
- the input terminal of the second transconductance amplifier is connected to the input terminal of the first transconductance amplifier;
- and
- the output terminal of the second transconductance amplifier is connected to the input terminal of the second transconductance amplifier via a capacitive feedback network;
- wherein the second transconductance amplifier comprises a current control circuit portion arranged to adjust a supply current drawn by said second transconductance amplifier.
3 more elements
A low noise amplifier comprising:
- a first transconductance amplifier having an input terminal and an output terminal, said first transconductance amplifier being arranged to receive an input voltage at its input terminal and to generate an output current at its output terminal;
- a second transconductance amplifier having an input terminal and an output terminal, said second transconductance amplifier being arranged such that:
- the input terminal of the second transconductance amplifier is connected to the input terminal of the first transconductance amplifier;
- and
- the output terminal of the second transconductance amplifier is connected to the input terminal of the second transconductance amplifier via a capacitive feedback network;
- wherein each transconductance amplifier comprises an inverter cell comprising a PMOS transistor and an NMOS transistor, arranged such that:
- a gate terminal of the PMOS transistor is connected to a gate terminal of the NMOS transistor at an inverter input terminal;
- a drain terminal of the PMOS transistor is connected to a drain terminal of the NMOS transistor at an inverter output terminal;
- a source terminal of the PMOS transistor is connected to a first rail;
- and
- a source terminal of the NMOS transistor is connected to a second rail.
8 more elements
Dependencies are inferred from the claim text.