tempvipguest
Newbie level 5

[Moved]Orcad pspice amplitude modulation simulation:why the RC out volt. is so small?
Hi,
I am simulating Amplitude Modulation circuit in Cadence.Here is the simulation sch:

V1 pulse freq=1GHz,Vpp=1v.V2 pulse freq=100KHz,peak to peak voltage is 0.1v.when the amplitude modulation sigal Vmod go through the RC filter,the demodulation signal Vlpf peak to peak is 50mV,and DC offset is about 600mV. what is the problem?Vlpf peak to peak should be 0.1v,and DC offset should be about 1V.

Could anyone help?Thanks!
pspice simulation file attached below:
View attachment carrier bak.rar
Hi,
I am simulating Amplitude Modulation circuit in Cadence.Here is the simulation sch:

V1 pulse freq=1GHz,Vpp=1v.V2 pulse freq=100KHz,peak to peak voltage is 0.1v.when the amplitude modulation sigal Vmod go through the RC filter,the demodulation signal Vlpf peak to peak is 50mV,and DC offset is about 600mV. what is the problem?Vlpf peak to peak should be 0.1v,and DC offset should be about 1V.

Could anyone help?Thanks!
pspice simulation file attached below:
View attachment carrier bak.rar