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Level Trigger And Edge Trigger

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1000 Threads found on edaboard.com: Level Trigger And Edge Trigger
Hello, everytime we talk about positive edge trigger and negative edge trigger flip flop. how do we design a postive edge trigger flip flop? how do we design it to trigger at the 5th (...)
1.How can I check the setup time and hold time for a timing path. the first FF is positive edge trigger, but the end FF is negative edge trigger one. 2. The hold time is still depended by clock frequency like normal? Thanks
Hi all i am writing a protocol for 89s52 and using assemly in Keil. I want to use 89s52's external interrupts in edge trigger mode(by setting IT0 and IT1 ). But Keil ignores my edge triger setting, It still work as in level activated mode. For example when i begin (...)
manasiw2 u cant do that, if u tie the clock to the select pin using a single MUX then if become latch no DFF cause the output will change as long as the input is changing if the clk is still high. It become level trigger not edge trigger. I think kanagavel_docs have provide a good (...)
That's pretty vague; could you be more specific? How fast? Voltage levels? One way is to use two flip-flops and an XOR gate.
It is the same.Looking at real parts reveals important differences.Mostly voltage supply requirements and hysteresis levels.
H i Friends here is one more digital question any one tell me the solution Design a square wave generator which takes only one positive edge trigger. ---XORGATE
ScorpFire, The various Schmitt trigger buffers and inverters that are available have fixed hysteresis. The Schmitt trigger is a comparator that has positive feedback to provide its hysteresis (difference between the high and low reference levels). You can build a Schmitt (...)
What is the difference between normal Nand gate and Schmitt trigger Nand ? Does it is interchangeable in an application ?
Hi Guys, For a design, if all clock domains are rising-edge trigger, shall I account for falling edge skew balance when CTS? Thanks.
Hi, How we can identify whether a communication (SPI/I2C etc) is level triggered or edge triggered w.r.t clock?
There are few points to be note here.... 1. Make sure that the interrupt is not masked. and note its priority! 2. Whats the nature of interrupt I mean level sensitive OR edge trigger or both?? 3. You are using switch that mans you may need debouncing!!
edge-triggered storage element is called F-F, and level-triggered storage element is called latch. Some puls-triggered F-F is used in dynamic logic circuits so as to save transistor counts, where the internal state of the F-F is changed (...)
I have got a situation where is triggering is continuous, i have to generate a 1 second pulse by triggering through a continuous high level voltage, there is no falling edge till the circuit gets reset. Not getting any clue.. :-|
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Why the cell level DRC and LVS by the P and R tool insufficient ??
Would like to know how to do system level design and simulation, and what kind of tools are popularly used? Thanks!
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Creating PMLs Automatically 1. Draw a PML base object at the radiation surface. 2. Select the faces of the PML base object to turn into PMLs. Select only external, planar faces and exclude faces defined as symmetry boundaries. 3. On the HFSS menu, point to Boundaries, and then click PML Setup Wizard. The PML Setup wizard appears.
what are level transistor and how they work and implemented, NEED SOME URGENT HELP
Yes. You had better complete P&R in block. and then in top level, all the blocks can be instanced as macros. In general, the power planning for block is nothing in particular. You need only to give a power supply to them in top level, as the macros in your design.
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Can we calculate capacitances required for mosfet small signal analysis from berkley MOSFET models level 53 and 54. If yes please let me know how to do it. Of course it is possible. See the BSIM manual how it is done. This i
low level just means more detail. One persons low level might be someone elses high level. Show your top level HDL code to a java person and they'll call it low level. ;)
all respected: I have worked on project of Water level sensor and Motor Control and successfully completed. Now I want to further add features to it... Please tell me suitable features
Free to download and try. The price is at US$49.95 PC version: Pocket PC version: It consists of a sound card dual trace oscilloscope, a sound card real time dual trace spectrum analyzer, and a sound card dual trace signal generator and can run them concurrent
I want to add; level trigger interrupt cannot recognize very short time pin signal . on the other hand edge trigger can recognize any short duration pulse .
I know that it is not advisable to use gated clock partly because of glitches caused by other changing signals. I am curious to know if glitches can happen when I take the edge of a non-clock signal(let's say, output of combinational logic) to trigger some event. If there is a problem, how do I avoid it when using edge (...)
Hi My name is Martin, and I am not very experienced with electronics. I know what the different components do in theory (transistors, capacitors, resistors, diodes, ...), but going from that and designing a circuit is a big leap for me. This is why I am here. I am trying to design a circuit (not homework, just hobby), which has to do the followi
I measured a moble phone test item "ORFS in receiver band" One of the setup that I don't understand. I connected 8960 "trigger out" to spectrum analyzer "Gate trigger Input". and set it as trigger slot=7 & gate (...)
No. Only one. Otherwise, it's a buffer. When level is high, latch gets whatever value coming in. When level is low, it won't latch new value (it stays at old value)
as we know that there are two types of trigerring level as well as edge which one is prefferred and why . give a proper reason beyond which u can said this is better. a simple one but important question on base of interview so plz ans it . plz give ur views fully thanks in advance. thanks a lot friends to help me.
i am trying to modify an old synthesizer to accept a 0v / 5v or 15v trigger input to trigger a sample / hold circuit. currently there is a slider that controls the sample time (frequency) of a sample and hold circuit. the dc output on scope after the slider/op amp circuit looks like a -13.5 / +13.5 v (...)
It's instructive to review the transistor or gate level schematics of usual edge sensitive flip-flops. You'll realize, that they are made of two level sensitive building blocks (latches). See the HC74 schematic from the TI datasheet. You can replace two transfer gates by a multiplexer, if you
Dear all: I have a question on scope? ==>If there are two signals need to measure on a scpoe, one is low frequency signal and another is high frequency signal, why we need to choose the low frequency signal as trigger source? Thanks. mpig
You can configure a diode, capacitor and resistor to create a ramp effect which will either (a) extend a positive pulse by decaying gradually to zero, or (b) slow the upward transition of a pulse so as to cause a delayed high. Then you can feed the ramp waveform to a schmitt trigger, and adjust the level (...)
I am using a logic analyser to measure a low frequency signal of period 2s.I am able to observe the signal but,I am not able to trigger on a rising/falling edge.The trigger point appears to be random.For much higher frequency signals I am able to do edge (...)
Hello, I am Sudarshan. I amm new to Eagle software. I need to use PTVS3V3S1UTR (Zenor diode - package - SOD 123W) and 74LVC2G14GW (pacakage - SOT -363). unfortunately I couldnt find them in the eagle library. So is there any way ? Can I use another devices with same foot print/package ?. For example, my Schmitt trigger foot print is SOT (...)
Hi friend, Please excuse me, I didn't get you. actually what your doing there? I guess you need two signals from op-amps (using two external interrupt.. please note it external interrupt is only a trigger like rising or falling edge of the signal).you wish to calculate time difference between both interrupt events. am I right friend? (...)
Hi Friends, Can any one tell me the transistor level circuit design for this truth table, let me know how to implement Regards, Urimi
When measuring waveforms or signals , when do you use or want to use the Negative or Positive trigger on the Oscope? If you have are measuring logic TTL or Cmos waveform/signals, using the negative or positive trigger will give you the same result? The Negative triggering is used (...)
Hi All 110663 Regarding the attached diagram, to drive a N-channel Mosfet switch, what is the difference between using "combination of an inverting schmitt trigger & an inverting gate driver" and "combination of a non-inverting schmitt trigger & a non-inverting gate driver"? I don't (...)
What are the limits of the prf detector? If these are logic level pulses or can be converted to logic levels by a comparator you can use a counter which is reset periodically and then examine the count value.
Look at the digital waveform out of your comparator to see if it is oscillating on the transitions. To add the hystersis to your comparator circuit, put a large value resistor from the digital output to the non-inverting analog input. Then put a small resistor from the non-inverting analog input to ground. Apply the signal to me be measured to
Hi, you can debounce by software. Normally slow signals can be triggered to with an interrupt. The moment when the trigger occurs is not precise to the edge of the signal any more. This can now drift by temperature etc. One thing you can do is leave away your capacitor. when first receiving a rising (...)
hi does somebody have 'drag and drop' asm library for decoding 1/3-2/3 pulses ? bit 0 is 1/3 x total period logic level 0 and 2/3 x total period 1 bit 1 is 2/3 0 and 1/3 1 this code can be inverted, no matter thx
Hi guys! We know that vcs is based on event-driven. But what's the arithmetic ? " = " assignments trigger events,and "<=" assignments trigger events, how does vcs deal with then? Thanks a lot! zhpy
Can you give a snippet of your source code? It's hard to tell without seeing what's wrong. I guess that you have, for example, a level-sensitive register (i.e. level-sensitive latch) and you are trying to assign a value to it using an edge-sensitive declaration.
The Simulink block "Variable Transport Delay" is found in 6.5 and 7.0 at least and could model a DLL. The problem could be that the "Variable Transport Delay" uses a discrete time circular buffer. That is to allow logic, real and complex values to path at the input at a higher rate than the delay time. That limit time resolution to (...)
I have a 6MHz noise sine wave signal from an oscillator which I would like to rectify. What would be a suitable schmitt trigger? Can they use analog input signals at this frequency? If so, can someone suggest a part number please. Thanks


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