公开(公告)号：US20210328565A1

公开(公告)日：2021-10-21

申请号：US17362885

申请日：2021-06-29

Applicant: HUAWEI TECHNOLOGIES CO.,LTD.

Inventor： Yunchao Guan ,  Lei Lu

IPC: H03G3/30 ,  H03F3/193

Abstract: A variable-gain amplifier and a phased array system are provided. A variable-gain amplifier includes a cascode circuit comprising a first amplification transistor and a second amplification transistor array that are cascaded, the second amplification transistor array comprising a plurality of second amplification transistors connected in parallel and configured to output an adjustable current to an output matching network, the first amplification transistor is a common-source transistor, the plurality of second amplification transistors are common-gate transistors, or the cascode circuit is a common-emitter common-base circuit, the first amplification transistor is a common-emitter amplification circuit, and the second amplification transistor array is a common-base amplification circuit. The variable-gain amplifier further including a variable capacitor circuit coupled to the second amplification transistor array and coupled to the output matching network at first nodes.

公开(公告)号：US12088268B2

公开(公告)日：2024-09-10

申请号：US17362885

申请日：2021-06-29

Applicant: HUAWEI TECHNOLOGIES CO.,LTD.

Inventor： Yunchao Guan ,  Lei Lu

IPC: H03F3/217 ,  H03F3/193 ,  H03G3/30 ,  H04B1/04 ,  H04B1/16 ,  H04B1/40

CPC classification number: H03G3/3036 ,  H03F3/193 ,  H03F2200/451 ,  H03G2201/103 ,  H03G2201/307 ,  H04B1/04 ,  H04B1/16 ,  H04B1/40

Abstract: A variable-gain amplifier and a phased array system are provided. A variable-gain amplifier includes a cascode circuit comprising a first amplification transistor and a second amplification transistor array that are cascaded, the second amplification transistor array comprising a plurality of second amplification transistors connected in parallel and configured to output an adjustable current to an output matching network, the first amplification transistor is a common-source transistor, the plurality of second amplification transistors are common-gate transistors, or the cascode circuit is a common-emitter common-base circuit, the first amplification transistor is a common-emitter amplification circuit, and the second amplification transistor array is a common-base amplification circuit. The variable-gain amplifier further including a variable capacitor circuit coupled to the second amplification transistor array and coupled to the output matching network at first nodes.