scuba
Member level 1

hi,i have some problem at my project. it's about single end mixer used antiparallel diode on cmos.the diode that i connect drain and gate of FET together and choose the small size.the mixer that i hope it can used as up and downconverter. when i simulate that i find it is easy to saturate cause when i change the IF power from -40 to -20dBm ,my conversion gain from -5 down to -25 (I use it as upconverter).so i confuse it .
i think what's the problem :
1.size is not right
2.diode is connect wrong.(IN GaAs diode used as conecting drain and source )
3.my setting in ADS is wrong.
which one ?
i think what's the problem :
1.size is not right
2.diode is connect wrong.(IN GaAs diode used as conecting drain and source )
3.my setting in ADS is wrong.
which one ?