Invention Grant
- Patent Title: VSWR compensation circuits for RF transmit chain
- Patent Title (中): 用于射频发射链的VSWR补偿电路
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Application No.: US13054798Application Date: 2009-07-22
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Publication No.: US08180306B2Publication Date: 2012-05-15
- Inventor: Frederic Francois Villain , Benoit Feron
- Applicant: Frederic Francois Villain , Benoit Feron
- Applicant Address: NL Eindhoven
- Assignee: NXP B.V.
- Current Assignee: NXP B.V.
- Current Assignee Address: NL Eindhoven
- Priority: EP08290720 20080723
- International Application: PCT/IB2009/053191 WO 20090722
- International Announcement: WO2010/010525 WO 20100128
- Main IPC: H04B1/04
- IPC: H04B1/04 ; H03G3/10

Abstract:
The present invention provides a method and apparatus for compensating the output of a transmitter stage (50) of a communications system. A communications apparatus has a transmitter stage (50) providing a variable control voltage which varies the power of the transmitter stage. The impedance at the output of the transmitter stage. (50) varies as the power varies. A control generation circuit compares a reference voltage to the variable control voltage to produce a control signal (VvswrC). A compensated load (40) coupled to the output of the transmitter stage (50) has active component (s) whose' impedance varies in response to the control signal (VvsweC) so as to compensate for the impedance at the output of the transmitter stage (50).
Public/Granted literature
- US20110130104A1 VSWR COMPENSATION CIRCUITS FOR RF TRANSMIT CHAIN Public/Granted day:2011-06-02
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