Invention Grant
US07904108B2 Double transformer balun for maximum power amplifier power
失效
双变压器平衡 - 不平衡变压器,用于最大功率放大器功率
- Patent Title: Double transformer balun for maximum power amplifier power
- Patent Title (中): 双变压器平衡 - 不平衡变压器,用于最大功率放大器功率
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Application No.: US10819388Application Date: 2004-04-07
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Publication No.: US07904108B2Publication Date: 2011-03-08
- Inventor: Jesus Alfonso Castaneda , Qiang Li , Ahmadreza (Reza) Rofougaran
- Applicant: Jesus Alfonso Castaneda , Qiang Li , Ahmadreza (Reza) Rofougaran
- Applicant Address: US CA Irvine
- Assignee: Broadcom Corporation
- Current Assignee: Broadcom Corporation
- Current Assignee Address: US CA Irvine
- Agency: Garlick Harrison & Markison
- Agent Shayne X. Short
- Main IPC: H04M1/00
- IPC: H04M1/00 ; H01F27/28

Abstract:
Double transformer balun for maximum PA (Power Amplifier) power. A novel approach is presented herein by which conversion from a differential signal to single-ended signal may be achieved using a double transformer balun design. The secondary coils of the double transformer balun also operate as a choke for the PA supply voltage. The secondary coils can operate as an RF (Radio Frequency) trap or choke to keep any AC (Alternating Current) signal components and to pass any DC (Direct Current) components. By using a double transformer balun design, relatively thinner tracks may be employed thereby ensuring a high degree of electromagnetic coupling efficiency and high performance. Also, these relatively thinner tracks consume a relatively small amount of space on the die. The double transformer balun design also includes a matching Z (impedance) block that is operable to math the Z of an antenna or line that the PA is driving.
Public/Granted literature
- US20050206490A1 Double transformer balun for maximum power amplifier power Public/Granted day:2005-09-22
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