Invention Grant
US08571512B2 Implementing a passive rotating harmonic rejection mixer (RHRM) for a TV tuner in an integrated circuit
有权
为集成电路中的电视调谐器实施无源旋转谐波抑制混频器(RHRM)
- Patent Title: Implementing a passive rotating harmonic rejection mixer (RHRM) for a TV tuner in an integrated circuit
- Patent Title (中): 为集成电路中的电视调谐器实施无源旋转谐波抑制混频器(RHRM)
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Application No.: US13343828Application Date: 2012-01-05
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Publication No.: US08571512B2Publication Date: 2013-10-29
- Inventor: Aslamali A. Rafi
- Applicant: Aslamali A. Rafi
- Applicant Address: US TX Austin
- Assignee: Silicon Laboratories Inc.
- Current Assignee: Silicon Laboratories Inc.
- Current Assignee Address: US TX Austin
- Agency: Trop, Pruner & Hu, P.C.
- Main IPC: H04B1/26
- IPC: H04B1/26

Abstract:
In one embodiment, a passive rotating harmonic rejection mixer (RHRM) is provided that can directly couple to an antenna to receive an incoming radio frequency (RF) signal. This RHRM can have a master RF device to receive the signal and provide first and second RF currents, a master LO device coupled to an output of the master RF device to receive the RF currents and mix them with a master clock signal of multiple polarities to obtain a mixed signal pair. The RHRM may further include a rotating switch coupled to the master LO device to cyclically switch the mixed signal pair to one of multiple virtual ground nodes at an output of the rotating switch, and operational amplifiers each having a first input terminal coupled to one of the virtual ground nodes and having a feedback filter coupled thereto.
Public/Granted literature
- US20130178183A1 Implementing A Passive Rotating Harmonic Rejection Mixer (RHRM) For A TV Tuner In An Integrated Circuit Public/Granted day:2013-07-11
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