Millimeter wave (mmw) radio frequency (rf) front end
AssigneeQUALCOMM Incorporated
InventorsAlaaeldien Mohamed Abdelrazek MEDRA, Ran SHU, Yunfei FENG, Ojas CHOKSI
Life of this patent
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Abstract
A radio frequency (RF) front end for a communication system includes a phase shifter having an in phase variable gain amplifier (I VGA) and a quadrature VGA (Q VGA) configured to receive radio frequency (RF) signals, the I VGA and the Q VGA configured to provide a selectable output to primary sides of first and second electromagnetic (EM) elements, respectively, the I VGA and the Q VGA configured to selectively provide DC current to a low noise amplifier (LNA).
Claims20
A radio frequency (RF) front end for a communication system, comprising:
- a phase shifter having an in phase variable gain amplifier (I VGA) and a quadrature VGA (Q VGA) configured to receive radio frequency (RF) signals, the I VGA and the Q VGA configured to provide a selectable output to primary sides of first and second electromagnetic (EM) elements, respectively, the I VGA and the Q VGA configured to selectively provide DC current to a low noise amplifier (LNA).
A method for providing current to a low noise amplifier (LNA) in a radio frequency (RF) front end, comprising:
- providing radio frequency (RF) receive signals to an in phase variable gain amplifier (I VGA) and to a quadrature variable gain amplifier (Q VGA);
- selectively providing DC current from the I VGA and from the Q VGA to a low noise amplifier (LNA);
- and
- combining an output of the I VGA and the Q VGA to provide a combined output at a desired phase.
A receive circuit, comprising:
- a low noise amplifier (LNA) circuit;
- an in phase variable gain amplifier (I VGA) and a quadrature VGA (Q VGA), each of the I VGA and the Q VGA having a gain transistor with a control terminal connected to an output of the LNA circuit, each gain transistor having a first terminal connected to a supply node of the LNA circuit and a second terminal connected to respective outputs of the I VGA and the Q VGA;
- and
- a hybrid quadrature generator (HQG) connected to the I VGA and the Q VGA.
Dependencies are inferred from the claim text.