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Sep 20, Dec 28, Dec 20, 10, 1, When datzsheet voltage across my sense resistor exceeds 4V, 4mA total current, the LMN will output low unbiasing the 2n Delete R1 for now.
You have several problems. AC gain confusion Posted by vustudent in forum: Hopefully, I was clear in my explanation.
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Do you already have an account? Dec 28, 6. Both serial connections and USB to serial conversion connections are covered. You didn’t show datasbeet entire datasheet page, but I think the DC gain of 70 is a minimum value for that collector current. The opamp and its negative feedback will automatically adjust Q1 base current such that the voltage across sense resistor R5 is identical to the voltage across R4.
Hope this helped, Kevin. Aug 1, 7, 2, An easier to read schematic: In this case, something in the 1K to 10K range might help, but I wouldn’t put it in until needed.
LM Datasheet PDF – FCISemiconductor
Yes, my password is: DC current gain Posted by qitara in forum: Depending on the value of the sense resistor there is a chance that the opamp output might not be able to swing low enough to drive Q1 correctly. I am pretty sure I’m interrupting the datasheet incorrectly.
Use a ohm resistor for Rsense and set the voltage divider to give you 0. I am trying to setup a constant current source using km356n 2n and a Motorolla LMN. Also can’t you turn off the “chicken pox” dots?? Your beta assumptions are wrong. I know I may have to implement some hysteresis into this circuit. Dec 28, 8.
LM356N Datasheet PDF – FCISemiconductor
I’d like to make a few comments: Here is a screen shot of the circuit, an explanation of my rationale, and the problem I am having. My Rationale Using the datasheet, to the best of my ability, it looks like my DC current gain would be Also, Vce is listed as 1V here.
The second key to this circuit is that the transistor emitter current equals to the collector current. Its purpose is to protect Q1 from too much base current, which is not a problem in this circuit. No, create an account now. Your name or email address: Dc gain Posted by Yuvaloh1 in forum: Dec 27, 2.
How I see it if I’m fully on, what would my collector current be? That will also help with the max output voltage.