Questions tagged [waveform]
The shape of a value (usually voltage) when graphed over time.
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Triangular waveform with low noise
I have a task to generate a triangular signal with variable amplitude and support.
The figure shows the type of signal and what parameters I want to change (“d” and “o”). Moreover, I need to change ...
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RC filter - compute output as a function of input for generating waveform
I'm not so deeply into the theory about all this, I may use strange terminology...
If I put a square wave through a simple lowpass RC filter, the output will be a sort of "rounded sawtooth", well not ...
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Export Modelsim waveform as image from command-line
Is there a way to export Modelsim/VCS waveforms as images (png, jpeg or SVG)?
Currently the only method I know of is to fire up the simulator, run the simulation and then either do a Print Screen or ...
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Quality Check of a Brushless DC motor on an oscilloscope
I am Quality Checking some BLDC(Brushless DC) motors with an oscilloscope by connecting the BLDC to a drill, running it and viewing the output on my oscilloscope. I have been checking the Vpp(Peak to ...
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Effects of ferrite isolator on waveform
I have recently measured the standing wave signal from a waveguide. I notice that as the frequency is lowered the signal tends towards a sawtooth wave.
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My guess for why this happens is that the EM ...
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Using a SSR for passing a DC PWM Signal that has positive and negative waveform
I am trying to control the PWM signal to a solenoid via an SSR by passing one leg through it to control the on/off.
I have tried 3 different SSR's and none of them fully stop the signal, I still get a ...
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Highish power/frequency sine wave generator
Below I'm showing an excitation signal for an ultrasonic system I'm curious about. It is driving ~ a 10 ohm load (outputting 5 watts). Does anyone have an idea what circuit would generate a waveform ...
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How do you sketch a signal given by x(t) = A(t/T) for time period 0 to T? Does t/T simply denote that the signal covers entire duration of T?
Does t/T simply mean that the signal has magnitude A over the entire "T" duration? Or does it mean that it covers only a fraction? How will it look?
I tried assuming A to be some magnitude ...
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Inductor voltage not decaying to 0V by t=5 TC
In a new lab I have the following circuit:
The inductor will change from 200 mH -> 400/600/800 mH. I am starting with 800 mH.
The function generator is a square wave at:
50 Hz, 20 ms period, and ...
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What could cause this flyback output current oscillation?
I designed a dc-dc flyback converter that is expected to reach 30 W output power. But it seems there are problems with reaching maximum power. Firstly I tested without the input filter and with non-...
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Inductor saturation current
I'm trying to determine an inductor's saturation current, I use a PWM with a gate driver (TLP250) and a 0.4Ω sense resistor at the source which I probe across to capture the current waveform.
I ...
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What am I doing wrong? Waveform generator and Oscilloscope test
In the circuit below, PS1 is a waveform generator. Originally, there will be the secondary of a current transformer. R36 is a MOV, D11 is a TVS diode and R29 a burden resistor. D12 sets the non ...
user115094
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Sine to sqare waveform but with variable peak-to-peak input
I need to calculate the speed of a little generator that produces a bipolar sinusoidal waveform with a peak to peak voltage value variable with the velocity. The produced signal also has a frequency ...
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Rise and fall timings of a pulse generator
In a digital programmable or static device, does the rise and fall timings and waveforms of a square pulse obey the reimann sum when observed at much higher resolutions?
If sampling rate of this ...
user209284
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Rubidium standard mystery output?
I've been playing with a frequency counter (Racal 2202R) that has a built-in rubidium standard.
It has two outputs, "Rb OUT 1" and "Rb OUT 2". I could not find any documentation at all, but the ...
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Power spectral density generated by AWG
I'm having trouble interpreting the results of my spectrum analyzer, concerning noise generated with an AWG. So, step 1. The AWG generates gaussian noise with mean 0 and variance A at a sampling rate ...
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Triangular wave generation using consant current
I am trying to design a circuit, that will generate a triangular wave from charging/discharging a capacitor with a constant current, but am stuck.
I have a power supply of +-12V and +5V, the circuit ...
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Do I need more capacitance for my crystal?
I've used the formula "CL = (C1 * C2) / (C1 + C2) + Cstray" (where C1 = C2) to calculate the capacitors I need for my board. CL is 18pF, I ballparked Cstray at 5pF, meaning I should use ...
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Where to apply manual delay in character LCD
I went to http://www.elm-chan.org/docs/lcd/hd44780_e.html in an attempt to find out how to make an LCD module work with the shortest timings. While the site does help with the initialization of the ...
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PFC Boost with LT1242
I have tried a PFC Boost simulation with lt1242. The specification is Input Voltage Range = 90 to 264 Vac, Output Voltage = 400 Vdc. I have got the result but I am not sure does this make sense at all ...
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BLDC motor - strange phase waveforms
I trying implement bldc motor driver based on below schematic.
The color circles on schematic correspond to waveforms from oscilloscope (all probes are connected to common GND of MCU and PSU that ...
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UTG900E output specification
The datasheet of UTG900E Waveform generator says it can output up to 10 Vpp on a 50 ohm load, but in chapter 3.3.1 is stated the load can be set between 1 and 999 ohm.
Nowhere in the datasheet I see ...
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125 kHz Arduino RDM6300 read issue
I've tried to read a 125 kHz signal with an Arduino using an RDM6300 module, but it didn't work.
I tried to catch the signal with Audacity. Please find attached photo with the signal.
How can I catch ...
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Problem amplifying differential signal from DAC
I encountered a problem while designing my own waveform generator. In my design, I am using a DAC (DAC5662) to generate different types of signals, and then I amplify the signal using an operational ...
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Reduce the effect of half wave rectifier on transformer
I have an electromagnetic feeder drive which is supplied from a transformer.
When I see the catalogue of the drive I noticed it using just the positive pulse of the AC source (half wave rectifier.)
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Can't Make Square and Triangle Waves
I have the following c++ code for making a sine wave using SFML, which i got from https://github.com/SFML/SFML/wiki/Tutorial%3A-Play-Sine-Wave.
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Siglent SDS1104X-E Integrate Function - Units of Measure
I am using a Siglent SDS1104X-E four channel oscilloscope which has a variety of math functions, one of which is to integrate a signal.
Currently I am measuring a voltage pulse across a gate resistor ...
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Why this stabilisation issue occurs for this waveform?
I'm using this simple wave folding schematic:
This would be best described with two short videos. Both videos have triangle input into wave folder, and I am changing the amplitude with trimpot.
First ...
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Pros and cons of supercapacitors in defibrillator
Basically I wonder about pros and cons of using super capacitors in defibrillator. It is known that 1.5 - 7 kV signal with duration from 1 to 200 ms is applied. The energy should not be more 200 J.
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Output waveform of an SMD crystal oscillator
I am going to setup lwIP on STM32f107RCT6 with DP83848 PHY device. The green LED of RJ000002 ...
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Understanding voltage sampling rate of induction motors
Why it is required to have a sampling rate of at least 4kHz when sampling the voltage waveform of a three phase induction motor?
I find most research papers use 4kHz but they don't state why.
I want ...
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Sketching the voltage waveform of a capacitor
I'm currently learning about capacitors,
Question:
Ignore the fact that it says voltage on the figure, the question reused the waveform of a previous question.
Since I = C(dv/dt), and C = 1 F, i ...
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Problem with waveform output .tr0 of hspice
I'm trying to see my project output waveform through CosMosScope but I get the error "The file format is not understood", while it gets job concluded in .lis file and simulate as well in avan waves.
I'...
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Is show waveform always referring to current?
In EveryCircuit, it allows you to "show waveform" for a particular component. For example:
Does waveform always refer to the current that is going through that component or are there ever alternate ...
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analog linear ramp with external pulse trigger
I am a hobbyist working on a project that requires a linear ramp generator (0VDC to 5VDC @ 120Hz) that is triggered by an external pulse. The requirement for the external pulse is so that the ramp ...
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Diode sine wave shaper - location of break points
I'm attempting to generate a sine wave from a triangular wave using the diode breakpoint method where the sine wave is approximated by multiple straight-line segments. Where should the breakpoints be ...
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Keysight Waveform Building Software
I want to create a waveform for the agilent 33220a waveform generator. It is a 40us arbitrary wave that I have designed in the keysight waveform builder pro via the Benchvue software, however I want ...
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Inverter Upgrade
I have 600VA, 12V Pure Sine Wave Inverter (Atleast under no load, its pure) having 8 IRF3205 Mosfets in total. (In full bridge configurtion)
I have modified its shunt. Now it do not give overload ...
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Test Equipment for generating large voltage spikes
I am trying to test a tachometer circuit which takes large voltage spikes from an inductive pick up and conditions them for TTL logic. I need input voltages in the order of 200V peak-to-peak but most ...
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Mitigating unknown error in power analysis of ATMega328P microcontroller
Setup:
Arduino Uno (ATMega328P Microcontroller) running inline assembly instructions using asm statements. Global interrupts disabled. Pin 13 (PORTB5), DDRB5 designated as output used for trigger ...
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Weird waveforms for a transmitter circuit
My book about digital logics ("Digital systems" of Ronald Tocci) provides a waveform which seems illogical to me about a transmitter circuit. This is the diagram of the circuit:
The inputs for the ...
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ALE and PSEN example waveforms - are highs and lows "flat enough"?
Sorry if this is a silly question. All of my waveforms (square, rectangle, pulse) exhibit the kind of behavior in the image where the highs and lows are not super-flat.
Clock is 18MHz and these ...
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Why can the loading resistor and capacitor let the unloading waveform become from negative to positive voltage?
Fig(1) is part of schematic,and it generate a sine wave .Fig(2) shows two waveform which are with load and unload,i can understand that these two waveforms will be different because of loading,but why ...
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Understanding a "state variable" RC-active filter
I have the following "state variable" RC-active filter:
If the input is a square wave, then when measuring the output I get a sine wave (channel 1 is the input and channel 2 the output):
And I don't ...
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Generating a cosine wave with multisim
I'm attempting to complete a project using multisim. I have to determine resistor and source values for a differential opamp.
One of the specifications is to supply a -10 amplitude cosine wave when ...
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Special Waveform Generation
I am wondering if I need any special kind of waveform / function generator in order to generate a signal with the following description / parameters:
19 V max and 6mA operational limits;
unbalanced ...
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