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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Why are USB devices slower than 480 MBit/s
Motivation
With a signaling rate of 480 MBit/s USB 2.0 devices should be able to transmit data with up to 60 MB/s. However today's devices seem to be limited to 30-42 MB/s while reading [Wiki:USB]. ...
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Op-amp speed: bandwidth vs slew rate
I was learning about the difference between op-amp slew rate and bandwidth.
Everywhere it says slew rate is a large signal parameter and bandwidth is a small signal parameter.
I have few questions:
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Oscilloscope Bandwidth, what's it all about?
This question popped up to me a few moments ago.
I was measuring what is intended to be a 50Mhz square wave of level 0 to 2.5, however what I saw on the screen is a sine wave that was centered around ...
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Why is an op amp's bandwidth higher at lower gains?
If I build a resistor network where the op amp has a lower gain, it is able to maintain its gain for a larger bandwidth. Why?
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How is rise time related to bandwidth of the signal?
Say, I want to limit the rise time of my digital signal edges to avoid dealing with transmission line effects.
How do I determine the maximum frequency of harmonics in my signal knowing that my rise ...
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What ultimately determines the speed of electrical media
I have heard several myths about this. Some have said "thicker wires mean faster speed" which I don't believe. Others have said different voltages and others have said higher frequencies.
Take Coax ...
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Why are common mode chokes with 90 ohm @ 100 MHz recommended for USB 2.0 Hi-Speed data lines?
When one looks at common mode chokes for USB 2.0 applications choke manufacturers always recommend CMC with a common mode impedance of 90 ohms @ 100 MHz.
Example
How does this relate to
USB 2.0 ...
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RLC Q factor measurement
I have a simple parallel RLC circuit (R in series to L and C which are in parallel to each other). I am using a 0.01 micro farad CK05 capacitor a 100k resistor and a 10mH inductor.
I measure a ...
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Is this a good design & layout of an active differential 'scope probe?
This question is an extension of Homebrew differential 'scope probe. I thought I should make this a new question though.
I need to measure a 100Mb/s LVDS signal to check its integrity. I will try to ...
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Ceramic capacitors microphonic bandwidth
I need to use some relatively high value (10uF) capacitors in a discrete switched capacitor circuit and I need them to precisely store their voltage for a small amount of time (about 5us). The ...
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Why are there two sets of ENBW correction factors?
For calculating the equivalent noise bandwidth of a non-brickwall filter, I can find two different sets of numbers, both of which claim they are similar things:
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Bandwidth of inverting and non-inverting op-amps
If the same op-amp is used in both inverting and non-inverting modes (with same closed loop gain using appropriate resistors),
will the closed loop bandwidth of the op-amp in both cases be the same?
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Why does more bandwidth guarantee high bit rate?
The definition of bandwidth is frequency range and it seems to be correct to say that higher bandwidth guarantees higher data rate.
However, i do not understand why it does.
Data rate depends on ...
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Oscilloscope: How are Bandwidth specification and Sampling Rate related?
I had thought that a (digital) Oscilloscope with higher Sampling Rate, would automatically have higher Bandwidth. That seems intuitive because of Nyquist Sampling Theorem. But I've read in several ...
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How to reduce a pulse voltage maintaining a high impedance?
I have one pulse with 200ns and 60 V. I have to reduce this voltage until 10 V min because of the monostable multivibrator. After this, I will extend the pulse with a monostable multivibrator and then ...
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Cat 5 cable 100MHz bandwidth meaning
Category 5 cable on Wikipedia:
The bandwidth of category 5 and 5e is the same (100 MHz) and the physical cable construction is the same, and the reality is that most Cat 5 cables meet Cat 5e ...
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Gain-bandwidth product proof for open loop/closed loop opamp
On the forum, post #12, Ghar claimed that the proof gain-bandwidth product from wikipedia is awful and he gave another proof but with feedback.
https://en.wikipedia.org/wiki/Gain%E2%80%...
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How am I getting 1 Gbps through a CAT3 cable?
My work from home office, in a difficult-to-plumb part of my house, has an existing CAT3 running to it from the main part of the house. I wanted to use a wired connection because the Wifi flakes out ...
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When would you need a low bandwidth opamp?
This opamp has a unity gain bandwidth of 27kHz, which is by far the lowest I've ever seen. (I first misread the 7.7V/ms slew rate as 7.7V/\$\mu\$s, because that's the units most often used.)
27kHz ...
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Confused about frequency and bandwidth in BP filter?
I am trying to design a simple bandpass filter and I am confused what should be my central frequency and bandwidth should be.
I have a 1MHz square wave with 20% duty cycle, so the signal is on for ...
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Is this measured rise time inaccurate because of limited oscilloscope bandwidth?
I don't have an LCR meter and wanted to learn how to use a fast edge pulse generator and an oscilloscope to do capacitance measurements as an academic exercise.
In W2AEW's videos, he builds a simple ...
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SPI communication - bits per second vs Hz
I have been reading more and more about bandwidths and frequencies to try to solve the following problem, but I am only ending up more confused. (I have limited electrical/signals background.)
I ...
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Does an Oscilloscope's bandwidth need to match or exceed the microcontroller's/processor's clock speed?
Looking to buy an oscilloscope for home use, I've seen the questions on here in regards to bandwidth. I'm interested in prototyping microprocessors with clock speeds 800+ MHz, but I shouldn't need an ...
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How does the "Multiplying Bandwidth" specification relate to a DAC output's maximum bandwidth
I'm struggling to understand what it means for a DAC to have a Multiplying Bandwidth of 200kHz. Does it mean that the max frequency component in the DAC's output cannot exceed 200kHz for reliable ...
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Simulating and Building a Multiple Feedback Band-Pass Filter
I have a distorted signal, and only want to allow frequencies between 95kHz and 105kHz. The input voltage is at 300mV peak to peak.
Thus, I need a Pass Band of 10kHz and a Central Frequency at 100kHz....
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Op-amp dominant pole bandwidth
I have been playing around with an op-amp design using TINA from Texas Instruments. I have selected the LM301A. TINA says that this op-amp has a dominant pole at 5 Hz. I have put the circuit ...
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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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Transmission of a digital signal over a medium
A digital signal is said to have a infinite bandwidth. If a transmission medium cannot have infinite bandwidth then how can a digital signal be transmitted over such mediums?
Please correct me if I ...
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Finding the bandwidth of second order lowpass filter
I have a lowpass filter with the transfer function \$H(s) = -\frac{3}{3s^2+s+3} \$. Converting it to standard form yields
$$H(s) = -\frac{1}{s^2+\frac{1}{3}s+1} $$
Comparing this to the standard ...
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Closed loop bandwidth vs open loop bandwidth
Is closed loop bandwidth always greater than open loop bandwidth ?
If not on what factors does it depend ?
When can it be greater?
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Why do higher frequencies mean higher data rates, and why do we even need frequencies to begin with?
This is regarding wired connections. I have heard that higher frequencies mean higher data rates since there are more cycles per second you can fit more data in per second. That makes sense but I ...
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Why does the amplitude of my output signal increase when I increase frequency of the input signal?
The signal generator outputs a sine wave into an LED which emits light onto a photodiode. The photodiode is connected in a TIA circuit and then the output is displayed on an oscilloscope.
The ...
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Why more bandwidth means more bit rate per second? [duplicate]
According to this link ( and some other sources I have found ) more bandwidth on a wire means more bit rates per second...
Can someone try to explain why this is so as simple as possible?
This is ...
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How the bandwidth is impacted by the load?
The bandwidth of electronic parts, like analog switches, is usually specified for a specific load, typically 50 ohm and 5 pF for example.
Now if I have an analog switch with a bandwidth of 1 GHz for ...
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How much gain I am getting and with the 2 stage transistor amplifier attached with a Global NFB [duplicate]
This is just a direct manual solving directly subtituting values in a formula with disregard to temp etc.
Sorry for the incomplete information here are the goals of this:
"gain of 100≤Av≤130 and ...
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Transimpedance amplifier bandwidth limit [closed]
What limits the bandwidth you can achieve on a transimpedance amplifier? Why can you not take measurements at say the GHz range?
I'm guessing it has something to do with an RC element in the circuit.
...
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What's the best phone cable for DSL? [closed]
I want to know what cable I should be using to connect my demarc to my DSL modem. When I plug in my DSL modem in the utility room (which is about 20' of wire from the demarc) I get a pathetic 4Mbps ...
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How does widening the frequency band allows us to make faster pulses in a radio link?
I’m new to radio communication and completely ignorant in the topic. I spent some time writing software which includes calculation of the channel capacity (in bits/second or symbols/second or bauds) ...
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Are cutoff frequencies of bandpass and bandstop filters equal?
Consider the two filter in picture
simulate this circuit – Schematic created using CircuitLab
Are the cutoff frequencies (i.e. the two frequencies at which \$V_{out}=\frac{1}{\sqrt{2}} V_{in}\$...
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What is the relationship between bandwidth and noise bandwidth
What is the mathematical formulae for noise bandwidth for a 1st order low pass system (and a second order LP systems analysis if possible). What is the importance of this concept, how and when is it ...
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minimum readable rise/fall times in an oscilloscope
How can I calculate minimum readable rise/fall times of a signal in an oscilloscope (from practical point of view)? Does it depend just to bandwidth and sampling rate of oscilloscope? regards
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