US 12,074,629 B2
Transformer-based current-reuse amplifier with embedded IQ generation for compact image rejection architecture in multi-band millimeter-wave 5G communication
Min-Yu Huang, Richmond (CA); and Thomas Chen, Richmond (CA)
Assigned to SWIFTLINK TECHNOLOGIES INC., Richmond (CA)
Filed by Swiftlink Technologies Inc., Richmond (CA)
Filed on Apr. 25, 2023, as Appl. No. 18/139,157.
Application 18/139,157 is a division of application No. 16/951,330, filed on Nov. 18, 2020, granted, now 11,677,430.
Prior Publication US 2023/0336203 A1, Oct. 19, 2023
Int. Cl. H04B 1/40 (2015.01); H03F 3/45 (2006.01); H03H 11/32 (2006.01); H04W 84/04 (2009.01)
CPC H04B 1/40 (2013.01) [H03F 3/45179 (2013.01); H03H 11/32 (2013.01); H03F 2200/336 (2013.01); H04W 84/042 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A transformer-based in-phase and quadrature (IQ) combiner circuit with an integrated amplifier, the IQ combiner circuit comprising:
a differential balun comprising a first inductor and a second inductor, the first inductor having a first input terminal and a first output terminal, the second inductor having a second input terminal and a second output terminal;
a third inductor magnetically coupled with the first inductor, the third inductor having a first isolation terminal and a third input terminal;
a fourth inductor magnetically coupled with the second inductor, the fourth inductor having a second isolation terminal and a fourth input terminal, wherein the third input terminal represents a negative quadrature-phase (Q−) input terminal and the fourth input terminal represents a positive quadrature (Q+) input terminal to receive a quadrature-phase differential signal from a quadrature-phase differential amplifier;
a first transistor coupled to the first input terminal of the first inductor; and
a second transistor coupled to the second input terminal of the second inductor, wherein the first transistor, the second transistor, the first inductor, and the second inductor form a part of an in-phase differential amplifier.