公开(公告)号：US20100164595A1

公开(公告)日：2010-07-01

申请号：US12642029

申请日：2009-12-18

Applicant: Francesco RADICE

Inventor： Francesco RADICE

IPC: H03D7/12

CPC classification number: H03D7/1433 ,  H03D7/1441 ,  H03D7/1458 ,  H03D7/1491

Abstract: A down-converter mixer may include a Gilbert cell, two transistor differential pairs, which drive output loads, and transistors defining respective tail generators coupled to common source nodes of the differential pairs. The transistors may receive a radio-frequency signal mixable with a local oscillator signal applied symmetrically between the differential pairs to produce in the loads, a signal deriving from down-converting the radio-frequency signal of an amount given by the frequency of the local oscillator signal. An inductor may be coupled to the common source nodes and which resonates with a capacitive load also coupled to the common source nodes, increases the impedance of such common nodes at the local oscillator signal frequency. The inductor may be in an open loop configuration in the absence of feedback from the mixer, and thus may be active both against noise at radio-frequency and distortion at low frequency.

Abstract translation: 下变换器混频器可以包括吉尔伯特单元，驱动输出负载的两个晶体管差分对，以及限定耦合到差分对的公共源节点的相应尾部发生器的晶体管。 晶体管可以接收可与在差分对之间对称地施加的本地振荡器信号混合的射频信号，以在负载中产生从由本地振荡器的频率给出的量的频率信号下变频的信号 信号。 电感器可以耦合到公共源节点并且与也耦合到公共源节点的电容性负载谐振，增加了本地振荡器信号频率处的这些公共节点的阻抗。 在没有来自混频器的反馈的情况下，电感器可以是开环配置，并且因此可以在低频下的无线电频率和失真的情况下都有效。