LMN Datasheet: LMN / DIP 8 Pin / Low Voltage Audio Power Amplifier, LMN PDF Download FCISemiconductor, LMN Datasheet PDF, Pinouts. These are the first monolithic JFET input operational ampli- fiers to incorporate well matched, high voltage JFETs on the same chip with standard bipolar. LFN/NOPB Texas Instruments Operational Amplifiers – Op Amps JFET INPUT OP AMP datasheet, inventory, & pricing.

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How does this factor in? Dec 28, Your name or email address: Why does your schematic drawing software produce backwards negative white lines on a black background instead of a normal positive image??

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 trying to setup a constant current source using a 2n and a Motorolla LMN. Datashedt didn’t show the entire datasheet page, but I think the DC gain of 70 is a minimum value for that collector current.


An easier to read schematic: You can omit the base resistor.

DC current gain Posted by qitara in forum: Dec 28, 4. To avoid these issues, you can change your voltage divider to use a voltage below the guaranteed max input voltage. Could someone explain this section to me?

2n3904 DC current gain confusion

Here is a screen shot of the circuit, an explanation of my rationale, and the problem I am having. No, create an account now.

Dec 20, 10, 1, Dec 29, Your beta assumptions are wrong. I want to ensure 4mA collector current regardless of my load. You May Also Like: By that logic my datasheef current, 3. Dc gain Posted by Yuvaloh1 in forum: Dec 28, 5. Thank you all so much for any input.

The output voltage is only guaranteed to be 3. Sep 20, Jun 29, 8.

LMN Datasheet catalog

That will also help with the max output voltage. I’d like to make a few comments: I am pretty sure I’m interrupting the dataaheet incorrectly. My Rationale Using the datasheet, to the best of my ability, it looks like my DC current gain would be Mar 4, 2, Dec 28, 8.


Dec 28, 6. Lastly, I’ve heard it is poor practice datasheet use an op-amp as a comparator without some sort of hysteresis. Both serial connections and USB to serial conversion connections are covered.

Hope this helped, Kevin. Its purpose is to protect Q1 from too much base current, which is not a problem in this circuit. It should not be used a design parameter for several reasons.

How datasheeet I implement this here? Yes, my password is: Also, Vce is listed as 1V here.

The LMN does not go rail-to-rail so the output is 3. Do dattasheet already have an account? Beta is also dependent on Vce. What exactly am I screwing up here? Quote of the day. Dec 27, 1. Mar 30, 7, 1, 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.