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US 12,719,425 B2Granted
Intermodulation distortion mitigation
AssigneeApple Inc.
InventorsHaowei Jiang, Milad Darvishi, Ming-Da Tsai
Life of this patent
Estimating the term…
Abstract
An electronic device includes one or more antennas and a radio frequency front end (RFFE) that is coupled to the one or more antennas. The RFFE includes a differential circuit and a tail current source. The tail current source includes a transistor with a drain coupled to the differential circuit via a tail node. The tail current source also includes a capacitance coupled between the drain and a gate of the transistor.
Claims20
An electronic device, comprising:
- one or more antennas;
- and
- a radio frequency front end (RFFE) coupled to the one or more antennas, wherein the RFFE comprises
- a differential circuit comprising a winding, and
- a tail current source that includes
- a transistor with a drain coupled to the differential circuit via a tail node, and
- a capacitance coupled between the drain and a gate of the transistor, the tail node being coupled to the winding.
4 more elements
A transceiver, comprising:
- a filter configured to couple to one or more antennas;
- and
- an amplifier coupled to the filter, wherein the amplifier includes
- a differential circuit, and
- a tail current source that includes a transistor with a drain coupled to the differential circuit via a tail node,
- a capacitance coupled between the drain and a gate of the transistor, and a resistance coupled to the gate of the transistor to form a bias filter with the capacitance, the resistance comprising a resistance value that is based on a corner frequency of an impedance provided at the tail node by an intermodulation distortion product.
3 more elements
An apparatus comprising:
- a differential circuit;
- a transistor that comprises a drain coupled to the differential circuit via a tail node, a source coupled to a ground node, and a gate;
- and
- a bias filter that includes
- a capacitance coupled between the drain and the gate,
- a resistance coupled to the gate, and
- an additional filter coupled in a cascade configuration with the capacitance and the resistance.
4 more elements
Dependencies are inferred from the claim text.