DeeLau
Newbie level 4
Hello,
I've a 2.1 GHz LDMOS transistor from freecale, before mounting it on the pc board,
I just use some Alligator clip cables connected between the DC source and the gate/drain pin of the transistor(just transistor, no mounting one the board).
According to the datesheet, the Vds is 28V, and the expected Ids is 250mA, the approx. Vgs is about 3V.
however, when I first turn on the drain voltage, then slowly ajust the gate voltage,
I found even Vgs is already 3V, the Ids is less than 10mA, and when Vgs reach to 3.8V, suddenly the Ids become some hundred mA, and there is also about 20mA current in the gate, is it means the transistor is already osillating? or it's a bad way
just use some Alligator clip cables connected between the DC source and the gate/drain pin of the transistor?
Can someone help me? thanks.
I've a 2.1 GHz LDMOS transistor from freecale, before mounting it on the pc board,
I just use some Alligator clip cables connected between the DC source and the gate/drain pin of the transistor(just transistor, no mounting one the board).
According to the datesheet, the Vds is 28V, and the expected Ids is 250mA, the approx. Vgs is about 3V.
however, when I first turn on the drain voltage, then slowly ajust the gate voltage,
I found even Vgs is already 3V, the Ids is less than 10mA, and when Vgs reach to 3.8V, suddenly the Ids become some hundred mA, and there is also about 20mA current in the gate, is it means the transistor is already osillating? or it's a bad way
just use some Alligator clip cables connected between the DC source and the gate/drain pin of the transistor?
Can someone help me? thanks.