HKYO
Newbie level 1
pll unlock
my pll unlocks in specific voltage range about 10mV
ex) Freq. unlock voltage(+- 10 mV)
86oMHz 1.63
870MHz 1.65
. .
and this unlock voltage range changes when i change the
bias of 4/5 divider. also when temperature is -25 degrees C
unlock voltage range increases like 100mV. This symptom happens
when pll locks high frequency. Somebody please help me.
my pll unlocks in specific voltage range about 10mV
ex) Freq. unlock voltage(+- 10 mV)
86oMHz 1.63
870MHz 1.65
. .
and this unlock voltage range changes when i change the
bias of 4/5 divider. also when temperature is -25 degrees C
unlock voltage range increases like 100mV. This symptom happens
when pll locks high frequency. Somebody please help me.