发明名称 |
Systems, devices, and methods for suppressing frequency spurs in mixers |
摘要 |
Systems, devices and methods are disclosed for suppressing the 2LO frequency spur, output from a mixer. In various exemplary embodiments, a DC bias circuit is electrically connected to provide DC bias to one or more non-linear elements of the mixer. The biasing voltage is used to cause the current-voltage characteristics and/or junction capacitances between non-linear elements to be more symmetric and/or to suppress 2LO leakage currents that form 2LO frequency spurs at the output of the mixer. The non-linear elements may comprise one of: BJT's, diodes, and FET's. The mixer may be one of: a subharmonic mixer; a fundamental resistive mixer; a fundamental subharmonic transconductance mixer; and a fundamental transconductance mixer comprising an anti-parallel diode pair. The system may further be configured to automatically determine an appropriate DC bias voltage level that will improve one of the LO-IF isolation and the LO-RF isolation.
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申请公布号 |
US8559905(B2) |
申请公布日期 |
2013.10.15 |
申请号 |
US20070950831 |
申请日期 |
2007.12.05 |
申请人 |
BUER KENNETH V.;MENON GAURAV;DARAPU RAMANAMURTHY V.;MUELLENBERG DEAN;VIASAT, INC. |
发明人 |
BUER KENNETH V.;MENON GAURAV;DARAPU RAMANAMURTHY V.;MUELLENBERG DEAN |
分类号 |
H04B1/10;H04K3/00 |
主分类号 |
H04B1/10 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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