Questions tagged [bandwidth]
Related to signal processing (a measure of the width of a range of frequencies, measured in hertz) or the rate of data transfer (or throughput) measured in bits per second
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Is RC frequency response related to series RC or parallel RC?
So in playing around with some frequency response stuff I made this circuit:
And I found that the cutoff frequency value is set by the Feedback Resistor and the capacitor. Take note that the ...
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Keysight bandwidth and rise time
According to the following application note from Keysight, one way to know what device to take for measuring a signal is to measure the rise time. Then according to the rise time of the system under ...
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Effect of GBW and slew rate for "small signal"
I would like to better understand how to choose an op amp for high speed application and more precisely I would like to better understand how the GBW and the slew rate influence the transient response/...
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How do I calculate resistor values for a second-order bandpass filter to achieve unity gain at 1 kHz?
The bandpass needs to have a bandwidth of 250 Hz with a centre frequency of 1 kHz.
The values I've calculated so far are R1 = 1000 Ω, R2 = 1000 Ω, C1 = 140 nF, and C2 = 180 nF.
I calculated these ...
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System bandwidth formula
Does anyone know how to demonstrate this formula?
It is also worth noting that you should consider your entire system bandwidth. You need to factor in both the bandwidth of your probe and your ...
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PCIe bus bandwidth
Calculate the bandwidth of a PCIe link with 8 lanes, 8b/10b encoding and 2.5 GHz frequency.
I tried the following formula but I am not sure of its correctness:
BW = lane data rate × encoding × no. of ...
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How can oscilloscopes be immune to radiated noise?
I have an oscilloscope which has a bandwidth of 500 MHz.
It means that all signal with a frequency under 500 MHz can be observed without (a lot of) distortion.
Noise radiated is said to begin at ...
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How do single-optical-fiber bidirectional communications work?
In the past, I have dealt with fiber optic network communication devices that utilize two fibers, RX and TX, each being dedicated to one direction. I was under the impression that two fibers are ...
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Discerning slew rate and bandwidth limitations
What I get is that, considering a 2 stage OTA, we have 2 effects that limit the amplitude and frequency of the amplified signal:
Bandwidth of the amplifier: as the frequency of the input signal gets ...
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How is Wi-Fi throughput so high?
While reading specs of a new ASUS Wi-Fi router - it said to have 2 GBPS throughput. How could it reach such throughput if all the WIFI bandwidth should be small and close to 2.4 GHz and 5 GHz?
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Oscilloscope bandwidth for motor driver applications
What should be the oscilloscope bandwidth for testing BLDC motor drivers? Is 20MHz bandwidth a good choice?
Switching frequency 16-20kHz
Test condition: loaded 20A, 24V
Test signals: High side and ...
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Cut-off frequency for RC-filter with two resistors and two capacitors
I'm sort of hard stuck on this question regarding RC-filters. I've tried calculating the total resistance of the circuit but I felt that it was the wrong way. Than I tried calculating Vout in terms of ...
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VNA: Why does the IF bandwidth affect the measurement speed?
I believe I understand the role of the IF bandwidth (IFBW) in a VNA measurement:
The signal is mixed down to the intermediate frequency (IF) and the receiver detects the signal in a frequency band ...
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What chip has gain of 1000, bandwidth of 500 kHz? [closed]
I'm building a project that needs gain of 1000 (from mV) and bandwidth of 500 kHz. Is there an op-amp (or other parts) with this characteristic? Or maybe it is available in only very expensive parts (...
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Frequency response of a cascade opamp circuit using LTSpice
I'm trying to simulate this circuit which consists of multiple stages of op amps, but I couldn't figure out the operating bandwidth of the circuit. Using AC analysis, the Bode plot is a weird shape ...
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How to correctly measure the bandwidth of an amplifier with gain from its bode-plot?
I have an amplifier with the following frequency response:
It is an inverting amplifier with a gain of about -12. I would like to know what would be the correct approach for identifying its bandwidth....
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Multiplexer bandwidth limit (Datasheet decryption) for two external clock on STM32
I would like to have the possibility to select between two main clock on my STM32. Both clock are single ended, 3V3 LVCMOS output. First clock is a 19.2 MHz TCXO, and second clock is a variable clock ...
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Is bandwidth a parameter set in software by oscilloscope manufacturers?
A colleague and I were looking at an oscilloscope catalog. They often had a model with different options for bandwidth, and higher bandwidth oscilloscopes were more expensive.
My colleague said that ...
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Which data transfer speed (connection protocol) do I need?
I have 124 sensors that sense analog signals ranging from DC to 25 kHz.
Analog data is converted to digital with a resolution of 16 bits. The ADC I am using is the AD7656 with a data rate of 250 kSPS, ...
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Presence of bandwidth in capacity formula
I'm looking two papers https://ieeexplore.ieee.org/abstract/document/9370130 and https://ieeexplore.ieee.org/abstract/document/8855846.
In the first paper, achievable rate is
w_n is bandwidth. p_n is ...
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Discrepancy in theoretical vs measured gainbandwidth in LTSPICE ideal OTA
I am using a very simple model to show the unity gainbandwidth of a closed loop sample and hold with a closed loop gain of 2. One would expect an ideal OTA to have a GBW independent of rout as GBW is ...
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Range Profile in Radar System
I am slightly confused on the range profile I am obtaining from my SCFW radar dataset. I am understanding of how fftshift works in shifting positive and negative frequency components to be centered ...
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Waveform acquired from scope, what is the sample rate for post processing?
I want to make a noise measurement with my scope, but I need it to be band-limited.
I am using a Tektronix TBS1102, which allows me to save to a USB flash drive an Excel/CSV file with the X and Y ...
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JFET source follower input impedance without gate resistor
I am trying to do a high bandwith and high imput impedance analog front end for a mini oscilloscope project. I am using a JFET for this purpose. I accounter a weird behaviour and i don't understand it....
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Input signal bandwidth of ADC
I prepare to use adc to do sub-sampling. Most SAR adc has -3dB input signal bandwidth in datasheet but no for delta-signam adc. Can I use modulation frequency as the bandwidth or there is another way ...
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PCB and breadboard parasitic capacitance
I am getting different bandwidth measurements from my breadboard and PCB (for the same circuit with exact same component values). The cut-off frequency I measure on the breadboard is slightly higher ...
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Contradictory relationship between quality factor and damping
I am studying control theory and mechanical vibrations.
From control theory aspect, I know that bandwidth and response time is inversely proportional, which means bandwidth and damping as well.
The ...
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What is the relationship between bandwidth in the context of a passable range of frequencies vs bits per second being transferred
I am in school for electrical engineering. I am still in introductory circuits.
I have seen bandwidth used in the context of a Bode plot, which was describing the range of frequencies that a filter ...
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Creating a Range Profile
I am relatively new to the radar/signal processing community. However, my team has been struggling in developing a range profile in our programming. Here are the details for a NI LabVIEW forum I ...
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I am having trouble measuring the amplitude of a 97 MHz signal with an oscilloscope with a bandwidth of 100 MHz
First, I designed a Colpitts oscillator with a frequency of around 94-97 MHz. I added a common emitter amplifier to the design to increase the output amplitude of the oscillator, then I connected the ...
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Bandwidth distance product
A fundamental principle of communications states that for any given transmission medium, bandwidth-length product is constant. I know that optical fibers, for example, are used for high data rate ...
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Maximum bit rate over a communication channel
Shannon formula C= B log (1+S/N)
Is this formula applied for baseband transmission only? or for both baseband and passband modulation? Can we apply it without any changes to any modulated signal? What ...
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Why do we use low frequency with copper wires and high frequency with air and optical fibers?
The bandwidth of twisted pair copper wire is low. Why can low frequencies propagate longer distances through copper wires than high frequencies? On the other hand, high frequencies can propagate long ...
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Acceptable overshoot, accuracy, and control bandwidth of a buck converter
I am designing a closed loop buck converter and was wondering what would be the acceptable values/performance for control parameters like accuracy, control bandwidth, and overshoot.
I know that the ...
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Gigabit Ethernet 1000BASE-T and Fast Ethernet 100BASE-T
I have this basic question.
Gigabit ethernet has two things - 1000BASE-T and 1000BASE-TX.
And Fast Ethernet has 100BASE-T.
Ethernet has 4 twisted pairs. Can someone tell me which are half duplex and ...
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100 BASE Tx Ethernet question
I am going through this Wikipedia article - Fast Ethernet and got this below table.
Can someone please explain why there are 3 line codes : 4B5B, MLT3 and NRZ-I done? Why all 3 are done?
Also can ...
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ADXL345 Accelerometer data rate vs bandwidth
I recently started working with the ADXL345 Accelerometer and got a bit confused on what's the difference between the data rate and bandwidth.
From the ADXL345 datasheet p14, we can see the different ...
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Question regarding bandwidth of digitally modulated signals
Assume that there are two carrier frequencies, 20 GHz (RF) and 200 THz (Optical). Both of these carrier waves are modulated by a digital signal using QPSK scheme.
Consider the frequency spectrum (or ...
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Why are coaxial cables typically faster/longer than twisted pairs?
I'm having trouble understand why coaxial cables tend to have higher bandwidth compared to twisted pairs. I couldn't find any source explaining why, they just mention the fact.
For instance:
"In ...
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Bandwidth of signal
What exactly do we mean the signal bandwidth is the range of frequencies the signal is made of?Is this referring to the Fourier transform of the signal in the frequency domain?
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Impact of Bandwidth Increase on Shannon Capacity
What is the impact of doubling of bandwidth on Shannon Capacity, assuming noise power spectral density and signal power remain the same?
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Common collector
I've created the following circuit in PSpice:
I was asked to simulate the circuit and create its Bode plot. I have done that and ended up with this :
I suspect that what I've got is incorrect ...
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What is the bandwidth formula for pulse code modulation (PCM)?
The image below shows the formula for the bandwidth of pulse code modulation (PCM.) There are two questions I want to ask:
Bandwidth of the PCM signal waveform is bounded by \$ B_{PCM} = \frac{1}{2}(...
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Q factor of antenna in receiver circuits
I have a quite broad question about the significance of the Q factor (and especially that one of the antenna) in
receiver circuits.
Say we have an abstract receiver consisting of an antenna and the ...
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Why is quantization defined in powers of integer multiples of two in digital image processing?
I have been studying quantization in the context of digital image processing. I referred to the 4th edition of the book titled Digital Image Processing by Rafael C. Gonzalez and Richard E. Woods.
In ...
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Design methodology for non-inverting summing op-amp
I'm trying to design an op-amp circuit to sum up four voltages by using a non-inverting summing configuration. You can see it in the circuit below, though for illustration's sake, the resistor values ...
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What is the upper frequency limit for an op-amp integrator?
I'm designing a circuit to process a di/dt signal. As the input is the differential of the measured current, I have to integrate the voltage to provide a representation of the current. The duration of ...
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What is bandwidth here?
The voltage(rms) created by thermal noise is:
What is the bandwidth(Δf) of the thermal voltage?
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The speed of light is 3*10^8 m/s and data transmission rate of optical fiber is ~100 Tb/s, how do we calculate data transmission rate?
How do we calculate data transmission rate? Is there some formulas that is involved?
Fiber optic cables beat copper in this department, and it isn’t even close. Fiber optic cables are made of tiny ...
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What could be the reason for degradation in the pulse shape in this instrumentation?
I'm experiencing long fall time issue for a 0.5ns pulse duration and 3MHz optical pulse source. The manufacturer test report provides the following pulse shape for the optical pulse.
I don't know how ...
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