- #1
andesam
- 9
- 0
Hi.
I am working on a circuit to control a dc motor using a pwm signal. The problem is that the pwm source (a LabJack UE9 DAQ) doesn't send a ttl signal, but a 0-3.5 volt signal (3.5 peak to peak). The power transistor needs about 5 volts to open completely between source and drain.
A simple op-amp does the job, but supposedly it will cause the transistor to overheat (my "mentor" told me so).
Can someone please shoot some ideas at me? I'd be really thankful.
- Andreas
(Please exuse my english)
I am working on a circuit to control a dc motor using a pwm signal. The problem is that the pwm source (a LabJack UE9 DAQ) doesn't send a ttl signal, but a 0-3.5 volt signal (3.5 peak to peak). The power transistor needs about 5 volts to open completely between source and drain.
A simple op-amp does the job, but supposedly it will cause the transistor to overheat (my "mentor" told me so).
Can someone please shoot some ideas at me? I'd be really thankful.
- Andreas
(Please exuse my english)