公开(公告)号：US20090149150A1

公开(公告)日：2009-06-11

申请号：US11950831

申请日：2007-12-05

Applicant: Kenneth V. Buer ,  Gaurav Menon ,  Ramanamurthy V. Darapu ,  Dean Muellenberg

Inventor： Kenneth V. Buer ,  Gaurav Menon ,  Ramanamurthy V. Darapu ,  Dean Muellenberg

IPC: H04B1/26

CPC classification number: H03D7/02

Abstract: 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.

Abstract translation: 公开了用于抑制从混频器输出的2LO频率支线的系统，装置和方法。 在各种示例性实施例中，DC偏置电路电连接以向混频器的一个或多个非线性元件提供DC偏置。 偏置电压用于使非线性元件之间的电流 - 电压特性和/或结电容更为对称和/或抑制在混频器输出端形成2LO频率杂散的2LO漏电流。 非线性元件可以包括以下之一：BJT，二极管和FET。 混合器可以是以下之一：次谐波混合器; 基本电阻混频器; 一种基本的次谐波跨导混频器; 以及包括反并联二极管对的基本跨导混频器。 该系统还可以被配置为自动确定将改善LO-IF隔离和LO-RF隔离之一的适当DC偏置电压电平。

公开(公告)号：US08559905B2

公开(公告)日：2013-10-15

申请号：US11950831

申请日：2007-12-05

Applicant: Kenneth V. Buer ,  Gaurav Menon ,  Ramanamurthy V. Darapu ,  Dean Muellenberg

Inventor： Kenneth V. Buer ,  Gaurav Menon ,  Ramanamurthy V. Darapu ,  Dean Muellenberg

IPC: H04B1/10 ,  H04K3/00

CPC classification number: H03D7/02

Abstract: 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.

Abstract translation: 公开了用于抑制从混频器输出的2LO频率支线的系统，装置和方法。 在各种示例性实施例中，DC偏置电路电连接以向混频器的一个或多个非线性元件提供DC偏置。 偏置电压用于使非线性元件之间的电流 - 电压特性和/或结电容更为对称和/或抑制在混频器输出端形成2LO频率杂散的2LO漏电流。 非线性元件可以包括以下之一：BJT，二极管和FET。 混合器可以是以下之一：次谐波混合器; 基本电阻混频器; 一种基本的次谐波跨导混频器; 以及包括反并联二极管对的基本跨导混频器。 该系统还可以被配置为自动确定将改善LO-IF隔离和LO-RF隔离之一的适当DC偏置电压电平。