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Looking at your o-scope output, my calibrated eye is fairly accurate and the datasheet is exactly right. Nov 23, 8, 6, You May Also Like: This is a very large increase in output impedance, and introduces a phase shift and low pass filter into the second opamp’s feedback loop.

LM258D PDF Datasheet浏览和下载

Quote of the day. So, each valley is about 66 microSeconds apart at 15kHz.

Digital Signal Processing in Scilab: Can anyone tell me why the waveform is lean towards the back? I have an original circuits as follows: Many of these devices are operated by non-tech-savvy users who may not know how to maintain their own device security. Aug 1, 7, 2, That means, according to my calibrated eye, the valley is about 25 microsecond wide.


You need a slower Pwm frequency or a faster op amp. Thank you for your help. Also, what is the function of Q2 in this circuit?

datsaheet The datasheet says the slew rate is 0. Feb 6, 2. Why did you replace an emitter-follower pull up device with a 47K resistor?

LMD – Texas Instruments – PCB Footprint & Symbol Download

Feb 16, 2. Posted by Faizan Ahmad in forum: LMD Datasheet is attached. Do you already have an account? Posted by gaya3eeee in forum: I don’t know if this saturated and the top was cut since this is very big output gain. View attachment Why does its output perform like this way, not dc voltage daatsheet

LMD – STMicroelectronics – PCB Footprint & Symbol Download

Posted by sarkarnov in forum: Can anyone tell me what this cable assy is for? Your name or email address: No, create an account now. So, let’s take 13 microseconds 0. Feb 16, 3. Feb 16, 1.


After I modified the circuits, which Q1 was replaced with 47K resistor and I put diode between pin 7 and the base of Q3. That means 13 microSeconds going down and 13 microseconds going up.

Feb 18, lm258f.

Note that low power devices are usually slow speed devices. How does this happen? Yes, my password is: The output was as follows. Posted by rezash in forum: View attachment Figure 4 Modified circuit Here is the modified circuit output, which is not my expectation.

View attachment Figure 3 flyback circuit provides power input for the circuit in Figure 2 When I measured the pin 7 output at its original circuit in Figure 1, its output is dataasheet voltage around