Monady
Advanced Member level 4
- Joined
- Dec 1, 2008
- Messages
- 109
- Helped
- 12
- Reputation
- 24
- Reaction score
- 3
- Trophy points
- 1,298
- Activity points
- 2,151
Hi dear all friends,
I have a problem with Hspice that may make you laugh! I simulated very very simple RC circuit! The value of capacitor and resistor are 0.01pF and 10KΩ, respectively. And input signal is a sine wave with 10MHz frequency. We can say that, based on the value of elements, this circuit is almost a pure resistive circuit. So we expect to have 0 degree phase difference. Also, based on the formula of phase difference, which is invtan(-Xc/R), the phase difference of this circuit should be 179.3 degree. Now I get confused why Hspice shows 90 degree phase difference (please take a look at the attached pic).
I would appreciate any help.
I have a problem with Hspice that may make you laugh! I simulated very very simple RC circuit! The value of capacitor and resistor are 0.01pF and 10KΩ, respectively. And input signal is a sine wave with 10MHz frequency. We can say that, based on the value of elements, this circuit is almost a pure resistive circuit. So we expect to have 0 degree phase difference. Also, based on the formula of phase difference, which is invtan(-Xc/R), the phase difference of this circuit should be 179.3 degree. Now I get confused why Hspice shows 90 degree phase difference (please take a look at the attached pic).
I would appreciate any help.