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Answer by Spehro Pefhany was spot on for this issue of the second dip. I just took some diode I happen to have, 1N4002, hooked it from GND to the inverter input pin, and it turned the spike into a mere wiggle. I just add this as a reply so I can confirm the answer with proof. [EDIT: I must be honest that I also switched out the Schmitt inverter with the non ...


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Most SRAM are also level triggered, few are edge triggered. One technique of making an SRAM or register file appear edge-triggered is to put a latch (eg LS373) in front of the register file with the latch fed the opposite polarity clock. With your circuit for creating a pulse you are injecting a large current into the substrate of the inverter on the falling ...


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You are driving the 74LS14 input below ground, which is outside of the normal operating region. Try connecting a diode (preferably a Schottky type such as BAT54) between the input and ground so that the input cannot go much below ground. A 1N4148 may work.


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This answer is actually @glen_geek's who commented on Jun 21 at 1:23: That upper right knob "VARIABLE" looks rotated counter-clockwise. Should be turned clockwise to the "CAL" position. and it is true. I have no idea why I didn't notice the discrepancy, I should have heard that 440 Hz is nothing like the tune fork and the 1 kHz of which ...


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What would be the major differences when both inverters would be teared down and the electronic components would be compared on 1 on 1? There would not be really major differences that you can see. Both the battery-powered inverter and the grid-tied solar MPPT inverter will have two power converters, a DC/DC voltage boost converter and a DC/AC inverter. In ...


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To answer all three of those questions completely wouid require a very long answer so I have tried to hit a scope that I thought made sense here. A grid tie inverter makes sure: the inverter output matches the phase of the grid power the inverter has a voltage slightly above the grid voltage the power factor is unity is powered down when the grid goes down ...


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I know that the post have been since quite long-time, but I came here during my search for a behavioral modelling for dead-time, such that I would avoid using spice models of gate-drivers which would slow down my test. However, I see that you already did it and your model works well. You were wondering why you cannot see the effect of dead-time because ...


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The induction motor has fewer turns of heavier wire than normal .The power of the motor is the same .It is just more amps at less volts .Say if you consider higher DC bus voltages like Porshe the induction motor would have more turns of lower diameter wire.If the Bus DC voltage was really high like thousands then insulation issues would kill the ...


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It is a space-vector PWM modulation. It is superior to sine-wave modulation in a way that better utilizies the DC link voltage by adding triangular waveform at frequency three times the fundamental frequency. This makes phase voltages to look ugly, but line voltages are sine waves as third harmonics cancel out. If you want to generate three-phase voltage, ...


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Yes, it is technically acceptable to use simple PWM control to provide a constant voltage DC bus and to then use separate 3 phase variable-frequency switching to control motor speed. It is also possible if desired to combine these two functions on a single switching operation where a DC bus is provided that varies in voltage with mains voltage and the 3 ...


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There's several ways to do this but here's one that comes to mind as elegantly built out of basic signal processing elements: First, you need a negative supply voltage, no matter what else you are doing. You can use a specialized switching converter to generate it from your positive supply, or use a bipolar power supply. Invert the input signal using an op-...


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You don't need an inverter, just connect the optocoupler inputs between signal and VDD instead of between signal and VSS. simulate this circuit – Schematic created using CircuitLab Shown as LEDs these are the start of the optocouplers.


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Not as simple as that. Adding more MOSFETs would reduce conductive losses but the increase in switching losses could kill MOSFETs. But gate drive capability is limited and adding more MOSFETs would slow down the rise/fall time of all transistors thereby increasing switching losses and MOSFETs could starting dying because of this. There are also ringing and ...


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As Kevin White has mentioned, the Pierce oscillator uses just one inverting gate, and to me that feels like exactly the correct approach. Not sure about "series resonance" (I recall reading something about different resonant modes in the crystals, and crystal cutting geometries) but my general idea is, that the crystal, being a two-pin device, ...


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Most such oscillators require external 22pF capacitors from each end of the STAL to achieve a nete phase inversion to implement proper oscillation. Since 22pF is LARGE, the silicon area likely is not used to provide those 44pF caps (which will vary as the manufacturer recommends for your frequency). Does your IC include those? I see two resistors, value ...


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I am using both short tubular and tall tubular batteries. The difference I found that the tall tubular batteries' life is longer than the short tubular. On an average a short tubular battery lasts for 6-8 years while a tall tubular battery lasts for 8-10 years. The backup time and charging time is quite the same.


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This inverter circuit consists of a 150 Watt boost converter to increase the DC voltage of the solar panel to 24 Volts. From what I can see, with a 24 volts DC supply, Q3 and Q4 will see about 24 volts on their gates with respect to ground. This is significantly beyond the stated absolute maximum rating in the data sheet extract above. I'm not ruling out ...


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It is connector to connector voltage. It can be line to line if you connect all three phases or it is line to neutral if you connect a single phase (if allowed). No, you may not use 3ph 400V fo a device that has 220VAC input, only phase + neutral (if single phase is allowed, only low power servo drive). If you intend to connect all three phases 400VAC to ...


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Firstly you have to recognize the basic topology of an inverting buck-boost circuit: - There is a block labelled PWM (red) and that drives the switching element. In the MC33063A it is a bipolar transistor. During the first half of the switching cycle (BJT activated), current ramps up in the inductor L. That current is flowing through the inductor to ground. ...


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