nnayak82
Junior Member level 3
Hi
I have designed a Gilbert Cell in PSPICE and would like to study the same . I am uploading the Schematic , Differential LO(Local Oscillator signal) and Differential RF signal and also the Output Waveforms .
Here are my questions:
1] Gilbert Cell is a frequency Multiplier i.e. If my LO signal is at frequency f1 and my RF signal is at frequency f2 , then my IF signal i.e output signal would be at frequency f1*f2 .
Or if my f1=f2 , the output would be at 2*f1 .
I hope by looking at the Output plot I have achieved the same .
2] I read in B.Razaavi book on ANlog Mixed signal design that Vout =Vin *Vcont i.e. he says that Output Voltage is product of VLO and VRF . But from my output plot is reflecting something else. What could be the reason?
I have designed a Gilbert Cell in PSPICE and would like to study the same . I am uploading the Schematic , Differential LO(Local Oscillator signal) and Differential RF signal and also the Output Waveforms .
Here are my questions:
1] Gilbert Cell is a frequency Multiplier i.e. If my LO signal is at frequency f1 and my RF signal is at frequency f2 , then my IF signal i.e output signal would be at frequency f1*f2 .
Or if my f1=f2 , the output would be at 2*f1 .
I hope by looking at the Output plot I have achieved the same .
2] I read in B.Razaavi book on ANlog Mixed signal design that Vout =Vin *Vcont i.e. he says that Output Voltage is product of VLO and VRF . But from my output plot is reflecting something else. What could be the reason?