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    • 6. 发明专利
    • Differential amplifier, voltage controlled oscillator, and voltage controlled oscillator operating method
    • 差分放大器,电压控制振荡器和电压控制振荡器工作方式
    • JP2007267410A
    • 2007-10-11
    • JP2007129898
    • 2007-05-15
    • Nortel Networks Ltdノーテル・ネットワークス・リミテッド
    • BROWN ANTHONY KEVIN DALE
    • H03K3/0231H03B5/12H03B5/20H03B5/24H03B27/00H03F3/45H03G3/20H03H11/04H03H11/18H03H11/20H03H11/42
    • H03H11/18H03B5/24H03B27/00H03F3/45076H03F2203/45201
    • PROBLEM TO BE SOLVED: To provide a CMOS differential amplifier which operates at a microwave frequency and is capable of achieving high quality with low output and low noise. SOLUTION: A microwave differential amplifier comprises a first and a second MOS device, each connected with the source to a common bias node, the gate to an input port for receiving a differential input signal and with the drains to an output port for providing a differential output signal. The Miller capacitors of each device provide the necessary feedback between the input and output ports for shifting the phase of the differential output signal with respect to the phase of the differential input signal with 45° at a predetermined frequency. The operating points of the respective MOS devices are maintained in the linear region of the respective transfer characteristic, using matched loads and corresponding bias currents. A VCO built with four such differential amplifiers in a gyrator configuration oscillates at the predetermined frequency and has eight output signals. COPYRIGHT: (C)2008,JPO&INPIT
    • 要解决的问题:提供以微波频率工作的CMOS差分放大器,并且能够以低输出和低噪声实现高质量。 解决方案:微波差分放大器包括第一和第二MOS器件,每个MOS器件与源极连接到公共偏置节点,栅极连接到用于接收差分输入信号的输入端口,并且漏极到达输出端口 提供差分输出信号。 每个器件的米勒电容器在输入和输出端口之间提供必要的反馈,用于相对于具有45°的预定频率的差分输入信号的相位移位差分输出信号的相位。 使用匹配的负载和相应的偏置电流将各个MOS器件的工作点保持在相应传输特性的线性区域。 在回转器配置中用四个这样的差分放大器构成的VCO以预定频率振荡并具有八个输出信号。 版权所有(C)2008,JPO&INPIT