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Multisim and Ultiboard
Multisim simple simulation
In first simulation I have source XFG1 100kHz 1V over C1,R1 male current ove R2 100M. U2a and U2b should be make current over R2 and make virtual ground between R2 R3.
If use only U2A its works , but with U2B as output buffer in simulation appear DC voltage 12.1V. Where does? U2 is povered only +-5V
Can someone explain?
Let's have a simple circuits as on Picture.
V3 is source 1Vpk 100kHz , this make over blocking capacitor C4 current over C3 1nF.
Probe PR4 say Vrms on C3 is 707.073mV , current over C3 is Irms = 450.072uA
Xc3=Vrms/Irms= 1571.02 Ohm..
Where is problem?
Xc=1/(2 * Pi * f * C ) = 1591.55 Ohm
Her is 20 Ohm difference and PR4 say on C3 is Vdc 84.93 uV
DC voltage between two capacitors?
Can someone explain it to me?
