US 11,894,968 B2
Inphase quadrature current selector amplifiers for wireless communication
Ayman Eltaliawy, Richmond (CA); and Min-Yu Huang, Richmond (CA)
Assigned to SWIFTLINK TECHNOLOGIES INC., Richmond (CA)
Filed by Swiftlink Technologies Inc., Richmond (CA)
Filed on Jan. 31, 2022, as Appl. No. 17/589,090.
Prior Publication US 2023/0246898 A1, Aug. 3, 2023
Int. Cl. H04L 27/36 (2006.01); H03F 3/24 (2006.01); H03F 3/16 (2006.01); H04B 1/38 (2015.01)
CPC H04L 27/36 (2013.01) [H03F 3/16 (2013.01); H03F 3/245 (2013.01); H04B 1/38 (2013.01); H03F 2200/336 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A transmit in-phase quadrature (IQ) amplifier, comprising:
a common gain stage to receive an input signal and to generate an amplified signal;
an in-phase quadrature (IQ) poly-phase filter coupled to the common gain stage to receive the amplified signal from the common gain stage and outputs a four-phase signal;
an in-phase (I) phase switching gain stage coupled to the IQ poly-phase filter to receive I components of the four-phase signal and outputs an amplified phase switching I signal; and
a quadrature (Q) phase switching gain stage coupled to the IQ poly-phase filter to receive Q components of the four-phase signal and outputs an amplified phase switching Q signal,
wherein the I or Q phase switching gain stage comprises a passive phase switching component or an active phase switching component.