DZ8205
Newbie level 4
I am running a NMOS switches control circuit by LTSpice, the way this circuit works as below: when VDD7 is off VDD9 turn for 5uS to charge C1 by voltage VDD8 which is +3.3V, then when VDD9 is off VDD7 is on for 5us to discharge C1, the C1 voltage Vout is measured.
The problem I am facing is the output voltage Vout of C1 is always around +1.0V when VDD7 is on to discharge C1. Even when I use +3.3V to control VDD9 instead of +1.3V, the voltage of C1 charge to +2.1V at beginning, but +2.1V immediately dropped down to +1.0V when VDD7 is on.
Please let me know the reason for above problem and how can I make C1 to get started to discharge with voltage higher than +1.0V.
Many thanks.
DZ
The problem I am facing is the output voltage Vout of C1 is always around +1.0V when VDD7 is on to discharge C1. Even when I use +3.3V to control VDD9 instead of +1.3V, the voltage of C1 charge to +2.1V at beginning, but +2.1V immediately dropped down to +1.0V when VDD7 is on.
Please let me know the reason for above problem and how can I make C1 to get started to discharge with voltage higher than +1.0V.
Many thanks.
DZ
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