公开(公告)号：US06665528B2

公开(公告)日：2003-12-16

申请号：US09876258

申请日：2001-06-06

Applicant: Brian J. McNamara ,  Heinz Banzer ,  Ludger Verweyen

Inventor： Brian J. McNamara ,  Heinz Banzer ,  Ludger Verweyen

IPC: H04B126

CPC classification number: H03D7/125

Abstract: A dual band mixer has a common node for at least one radio frequency input and an intermediate frequency output. The dual band mixer also has a first transistor with a gate coupled to a first local oscillator input and a drain coupled to the common node, and a second transistor with a gate coupled to a second local oscillator input and a drain coupled to the common node. Interconnection circuitry turns off the second transistor when the first local oscillator input signal is applied to the first transistor, and turns off the first transistor when the second local oscillator input signal is applied to the second transistor.

公开(公告)号：US06369641B1

公开(公告)日：2002-04-09

申请号：US09668439

申请日：2000-09-22

Applicant: Brian J. McNamara ,  Heinz Banzer ,  Ludger Verweyen

Inventor： Brian J. McNamara ,  Heinz Banzer ,  Ludger Verweyen

IPC: H01J1982

CPC classification number: H03K17/145 ,  G05F3/205 ,  H03K17/302 ,  H03K17/687 ,  H03K17/693

Abstract: In one aspect, a bias circuit includes a rectifier, a negative bias level setter, and a negative bias extractor. The rectifier has a rectifier input and a rectifier output. The rectifier is configured to produce at the rectifier output a negative rectified voltage signal from an alternating input signal applied at the rectifier input. The negative bias level setter couples to the rectifier output and provides a path for current establishing the negative rectified voltage signal produced at the rectifier output. The negative bias extractor has an extractor output and an extractor input coupled to the rectifier output. The negative bias extractor is configured to produce at the extractor output a substantially constant negative bias signal from the negative rectified voltage signal produced at the rectifier output. In another aspect, a bias circuit includes a biasing output coupled between a positive voltage source and a negative voltage source, and a switching circuit coupled between the positive voltage source and the biasing output. The switching circuit is configured to define two or more different current paths through the switching circuit and thereby produce two or more respective biasing states at the biasing output.

Abstract translation: 一方面，偏置电路包括整流器，负偏置电平设定器和负偏压提取器。 整流器具有整流器输入和整流器输出。 整流器被配置为在整流器输出端产生来自在整流器输入端施加的交流输入信号的负整流电压信号。 负偏置电平设置器耦合到整流器输出，并提供用于建立在整流器输出处产生的负整流电压信号的电流的路径。 负偏压提取器具有抽出器输出和耦合到整流器输出的提取器输入。 负偏压提取器被配置为在提取器处产生来自在整流器输出端产生的负整流电压信号的基本恒定的负偏置信号。 在另一方面，偏置电路包括耦合在正电压源和负电压源之间的偏置输出以及耦合在正电压源和偏置输出之间的开关电路。 开关电路被配置为限定通过开关电路的两个或更多个不同的电流路径，从而在偏置输出处产生两个或更多个相应的偏置状态。