Hello,
I have 4 square signals generated with a MSP, so with the logic level 0-3.3V. I need this signals with the logic levels 0-15V. I made a circuit like in the image attached. I used for the NMOS : NDS331N from Fairchild Semiconductor (1.3A, 20V) and for the PMOS : NTR4502PT1G from On Semiconductor (-1.95A, -30V). The switch ON is good, with no delay, but the switch OFF is taking ~25us. I tried to change the 2 pull-down but the switch OFF is always 25-30us. My signals have to be precise at less than us, because I have some signals with a time ON of 2us. See the attached photos for an example of my problem. Do you have any idea from where the delay appears from?
Thanks,
Adina
I have 4 square signals generated with a MSP, so with the logic level 0-3.3V. I need this signals with the logic levels 0-15V. I made a circuit like in the image attached. I used for the NMOS : NDS331N from Fairchild Semiconductor (1.3A, 20V) and for the PMOS : NTR4502PT1G from On Semiconductor (-1.95A, -30V). The switch ON is good, with no delay, but the switch OFF is taking ~25us. I tried to change the 2 pull-down but the switch OFF is always 25-30us. My signals have to be precise at less than us, because I have some signals with a time ON of 2us. See the attached photos for an example of my problem. Do you have any idea from where the delay appears from?
Thanks,
Adina
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