ali kotb
Member level 3
hii , iam designing xtal osc.
and i need to increase the impedence (-ve) to get enough gain to excite the osc.
so , i removed the xtal model (2 branches of l, c, r) and i added current source (horizontal one) dc=0 , ac = 1A
and i measure the ac voltage drop across this source
now , it is -ve value (+fb ) but it is value is too small to excite the osc( Z < resistance of xtal )
so how to increase the real impedance across the horizontal current source
the ct is attached
i will really appreciate ur help
and i need to increase the impedence (-ve) to get enough gain to excite the osc.
so , i removed the xtal model (2 branches of l, c, r) and i added current source (horizontal one) dc=0 , ac = 1A
and i measure the ac voltage drop across this source
now , it is -ve value (+fb ) but it is value is too small to excite the osc( Z < resistance of xtal )
so how to increase the real impedance across the horizontal current source
the ct is attached
i will really appreciate ur help
