Invention Grant
- Patent Title: Dual primary switched transformer for impedance and power scaling
- Patent Title (中): 用于阻抗和功率缩放的双主开关变压器
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Application No.: US13657300Application Date: 2012-10-22
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Publication No.: US08786372B2Publication Date: 2014-07-22
- Inventor: Wayne D. Tattershall , David E. Jones
- Applicant: RF Micro Devices, Inc.
- Applicant Address: US NC Greensboro
- Assignee: RF Micro Devices, Inc.
- Current Assignee: RF Micro Devices, Inc.
- Current Assignee Address: US NC Greensboro
- Agency: Withrow & Terranova, P.L.L.C.
- Main IPC: H03F3/04
- IPC: H03F3/04
Abstract:
This application reduces the power of series combined transformers and of parallel combined transformers while maintaining efficiency. In one embodiment, a series combined transformer is provided with a switch between a first primary inductor and a second primary inductor, in order to provide at least two modes. In a high power mode, the switch is open and the series combined transformer operates normally. In a low power mode, the switch is closed, one amplifier from a first differential amplifier pair is shut down, one amplifier from a second differential pair is shut down, and the series combined transformer operates efficiently in a low power mode.
Public/Granted literature
- US20130099858A1 DUAL PRIMARY SWITCHED TRANSFORMER FOR IMPEDANCE AND POWER SCALING Public/Granted day:2013-04-25
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