第一次做passive mixer,一点都不会，向各位大牛请教

tideblue

9 Yes you can
8 simulate them separately first
7 yes
6 yes
4 I think the numbers are difficult
3 better overall performance
2 better noise performance
1 You do not need to set the source voltage of the switches

[ 本帖最后由 tideblue 于 2009-6-2 22:14 编辑 ]

tideblue

在家可以输中文了
你的这种结构我仿过，有一点点认识
passive mixer 没有DC current,
而且parasitic capacitance at the source 也会把直流电压拉到0(或者opamp的common mode voltage level)
passive mixer中的switch是在linear reguion
直流VDS可以为0
opamp应该有CMFB

有一个要注意的是为了不让switch on time overlapped
the DC voltage at the gate of the switch should be varied at different corners

还有就是如果你还有IQ channel的话，注意不同channel的cross talk
详细分析可以看看2008 JSSCC st发的一篇802.15.4的receiver的paper