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US 2009/0213276 A1Published application
Receiver having a gain-controllable input stage
AssigneeNXP B.V.
InventorEfthimios Tsilioukas
Life of this patent
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Abstract
A receiver has an input stage (LNA) that comprises, in a signal direction from an input (SI) to an output (SO), an input transistor (Q1) and an attenuator (D1, D2, R7-R12, C2-C5). The attenuator provides an attenuation that depends on a control signal (VDC). The input stage comprises a transistor-biasing circuit (R2) that biases the input transistor in dependence on the control signal.
Claims8
A receiver having an input stage comprising in a signal direction from an input to an output:
- an input transistor;
- and an attenuator, which provides an attenuation that depends on a control signal, the input stage comprising a transistor-biasing circuit arranged to bias the input transistor in dependence on the control signal.
A method of operating a receiver that has an input stage, which comprises in a signal direction from an input to an output:—an input transistor;
- and an attenuator, which provides an attenuation that depends on a control signal, the method comprising:
- a transistor-biasing step in which the input transistor is biased in dependence on the control signal.
Dependencies are inferred from the claim text.