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US 12,341,543 B2Granted
Supporting wideband inputs on RF receivers
AssigneepSemi Corporation
InventorsParvez Daruwalla, Rong Jiang, Sung Kyu Han, Khushali Shah
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Abstract
Methods and devices to support multiple frequency bands in radio frequency (RF) circuits are shown. The described methods and devices are based on adjusting the effective width of a transistor in such circuits by selectively disposing matching transistors in parallel with the transistor. The presented devices and methods can be used in RF circuits including low noise amplifiers (LNAs), RF receiver front-ends or any other RF circuits where input matching to wideband inputs is required.
Claims20
A radio frequency (RF) circuit comprising:
- a transistor element comprising an input transistor having a gate terminal coupled to an input terminal, and a drain terminal coupled to an output terminal;
- the transistor being configured to receive an input RF signal at the input terminal;
- wherein
- an effective width of the transistor element is configured to be selectively adjusted based on a detected bandwidth of the input RF signal to improve handling of the input RF signal.
1 more element
A radio frequency (RF) circuit comprising:
- a transistor element comprising an input transistor having a gate terminal coupled to an input terminal, and a drain terminal coupled to an output terminal;
- the transistor being configured to receive an input RF signal at the input terminal, and
- a programmable bias circuit configured to control a DC bias current through the drain or source terminal of the input transistor, and
- wherein
- an effective width of the transistor element is configured to be selectively adjusted based on a bandwidth of the input RF signal.
2 more elements
Dependencies are inferred from the claim text.