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US 8,280,329 B2Granted
Receiver having a gain-controllable input amplifier
AssigneeNXP B.V.
InventorFrederic Mercier
Life of this patent
Estimating the term…
Abstract
A receiver has an input amplifier (RFAMP) that comprises a signal-voltage amplifier (SVA) and a feedback path (FBP). The signal-voltage amplifier (SVA) provides a voltage gain (VG) from an input node (SESf) to an output node (SON). The voltage gain (VG) is controllable. The feedback path (FBP) provides a transadmittance (GM) from the output node (SON) to the input node (SIN). The transadmittance (GM) is controllable.
Claims11
A receiver having an input amplifier that comprises:
- a signal-voltage amplifier arranged to provide a voltage gain from an input node to an output node, the voltage gain being controllable;
- and
- a feedback path arranged to provide a transadmittance from the output node to the input node, the transadmittance being controllable;
- the signal-voltage amplifier comprising:
- an input transistor-stage arranged to provide a signal current in response to a signal voltage that is present on the input node;
- an impedance arranged to provide an amplified signal voltage in response to the signal current, which the input transistor-stage provides.
3 more elements
A receiver having an input amplifier that comprises:
- a signal-voltage amplifier arranged to provide a voltage gain from an input node to an output node, the voltage gain being controllable;
- and
- a feedback path arranged to provide a transadmittance from the output node to the input node, the transadmittance being controllable;
- the receiver comprising a gain-and-feedback control interface arranged to control the voltage gain and the transadmittance of the feedback path so that the voltage gain and the transadmittance are substantially inversely proportional;
- the gain-and-feedback control interface comprising a biasing control loop arranged to apply a biasing control current to the signal-voltage amplifier, the biasing control current depending on the voltage gain, and arranged to apply a copy of the biasing control current to the feedback path, the transadmittance of the feedback path depending on the copy of the biasing control current.
2 more elements
A receiver having an input amplifier that comprises:
- a signal-voltage amplifier arranged to provide a voltage gain from an input node to an output node, the voltage gain being controllable;
- and
- a feedback path arranged to provide a transadmittance from the output node to the input node, the transadmittance being controllable;
- the feedback path comprising a feedback transistor-stage arranged to convert a signal voltage at the output node into a feedback current that flows to the input node;
- the feedback transistor-stage comprising a differential transistor pair having an input for receiving the signal voltage at the output node and an opposite input for receiving a signal voltage at the input node.
2 more elements
Dependencies are inferred from the claim text.