Stack Exchange Network

Stack Exchange network consists of 175 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Visit Stack Exchange

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

7
votes
1answer
2k views

Why do FM radio signals occupy greater bandwidth than AM?

If a 5kHz baseband signal is modulating an AM carrier wave, the sidebands will be centered around the carrier wave and the the signal will occupy 10kHz bandwidth. AM radio limits the upper modulating ...
2
votes
2answers
520 views

Select appropriate bandwidth for sensor (MEMS gyroscope)

Short question: how to select the correct bandwidth for a sensor? Some further details. I'm working with an ADIS16260 (rate gyro) placed upon an industrial vehicle. This sensor has both an analog ...
0
votes
1answer
568 views

What is “average recieved signal power over bandwidth”?

I came across to Shannon’s formula for calculating channel capacity and I don’t quite understand why we calculate average signal power… “over bandwidth”. Why over that "domain of interest"? Here is ...
0
votes
1answer
236 views

PLL Loop Filter and its influence on speed

I was doing some research on Phase Locked Loops (PLLs). Now what I understand is, that the Loop Filter is first necessary to suppress unwanted signals on the VCO, so the tuning is controlled by the DC ...
0
votes
1answer
66 views

Is it important to consider channel bandwidth of the signal to measure cable path loss for RF testing?

I am performing some RF tests for 802.11 and measuring path loss of the RF test setup, it has a mix of PSK & OFDM signals. I see the norm is to use a Continuous Wave signal to perform RF path loss,...
1
vote
3answers
942 views

Bandwidth and frequency domain

Hello. I have one question to solve, but I have no idea about calculating bandwidth and converting time domain into frequency domain. Can you give me a hint?
0
votes
1answer
5k views

Relation between Signal to Noise Ratio (SNR) and Transmission Bandwidth for FM signal

I was encountered by the below question :: ...
0
votes
1answer
107 views

Symbol rate and optical bandwidth relation

I am quite new to the field of optical communication, so perhaps this question is so easy. In reading some papers I have faced to the concept of optical bandwidth. For example, they say the symbol ...
0
votes
2answers
82 views

Reduce output noise power while keeping input bandwidth constant

Assume our signal source has a white background noise. The output of this source is connected to our system. We know that increasing the input bandwidth of the system leads to more noise flowing into ...
2
votes
2answers
392 views

How do you use Gain Bandwidth Product to estimate bandwidth at different gains?

I was doing a question related to the dependence of op amps on frequency.This question is from 2nd year electrical engineering micro electronics by sedra smith. Here is the question: So there is a ...
2
votes
3answers
506 views

What does bandwidth mean in general, and in the context of the following examples?

Some examples : 1.The bandwidth of an operational amplifier 2.The bandwidth of a transmitted amplitude modulated signal 3.The bandwidth of a signal used in coaxial cables / optic fibre cables 4.The ...
1
vote
2answers
206 views

I/V converter + analog switch

I am trying to switch the ranges of an I/V amplifier, such that I can measure from 100nA to ~1mA of current up to 100kHz (similar to this question). I make the switching using an TS5A3357 analog ...
0
votes
1answer
345 views

Bandwidth analysis for photodiode TIA using matlab

The schematic below show a photodiode TIA circuit, and i tested by using an led as a light source, and by connecting the PCB to the osscilloscope using the bnc connector to see the response of the ...
1
vote
2answers
172 views

May I please have help calculating the noise bandwidth for the circuit below

I am trying to calculate the noise bandwidth for the circuit below. This question and diagram is taken from the book "Low-noise electronic system design" by C.D. Motchenbacher and J.A. Connelly (if ...
0
votes
1answer
394 views

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}\$...
3
votes
1answer
2k views

USB 3.0 Bandwidth Per Individual Port

Folks, Let's say I have a USB 3.0 card with four USB 3.0 ports on it. I just connected the card to my mother board. When we say 640MB/s of bandwidth for USB 3.0, is that bandwidth per port (or 640*4 ...
1
vote
1answer
230 views

How many bits are addressed through one CAS command in DRAM?

From what I understand one column and row pairing corresponds to 64 bits from the DRAM chip, but this makes me think that one would then incur the CAS Latency (~18 clock cycles in DDR4) for EVERY ...
0
votes
2answers
384 views

Doubt regarding Nyquist theorem for sampling analog signals [duplicate]

If for an arbitrary signal H(f) = 1 for 300-f-3700 Hz; 0 otherwise, what should be the minimum sampling rate? 7400 Hz or 6800 Hz and why?
5
votes
1answer
500 views

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: ...
0
votes
2answers
408 views

Bandwidth of a system

This link says that the bandwidth is the frequency at which the magnitude of the frequency response is decreased by 3dB from the value of the initial horizontal asymptote. But wikipedia says "In ...
1
vote
2answers
3k views

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 ...
1
vote
6answers
2k views

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 ...
0
votes
1answer
2k views

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%...
1
vote
2answers
113 views

Big loop gain vs. big bandwidth

If one was looking for an audio amplifier of high quality, with very low distortion, which one of these two options would be better? Large loop gain (i.e. \$af\$) but small open loop bandwidth Small ...
4
votes
4answers
2k views

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 ...
0
votes
2answers
671 views

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 ...
0
votes
2answers
69 views

Spread spectrum bandwidth

Can someone explain how it derived the bandwidth for spread spectrum on following link http://www.ausairpower.net/OSR-0597.html (paragraph 9)?
3
votes
1answer
1k views

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 ...
6
votes
2answers
1k views

Real rise time with oscilloscope and probe

I'm still a bit new to this domain, just wondering if the rise time of a probe and the oscilloscope itself have to be substracted to the measure in order to recover the real measured rise time? Let's ...
2
votes
1answer
332 views

Analog signal multiplexing with digital control

I need to route one of several analog signals to a single ADC input, using digital control signals. I have done this in the past using the 4051 multiplexer IC (or the more modern 74HC4051), but this ...
0
votes
2answers
385 views

bandwidth of digital control design in conventional dc-dc converter

I designed conventional single inductor two output dc-dc boost converter in psim. This means inductor energy is stored and thrown to 1 output at one cycle and charged and discharged to the 2nd output ...
1
vote
2answers
245 views

Modulation and bandwidth

I have read in Data Communications and Networking, 5th Edition, by Forouzan that the formula for calculating the bandwidth for QAM modulation is \$B=(1+d)S\$ where \$d\$ is factor that depends on ...
2
votes
1answer
1k views

What physical factor affects the antenna's bandwidth?

Antenna's have a rated bandwidth of frequencies on which they operate. I understand that the antenna will still operate outside these frequencies, just that the signal will experience a greater ...
1
vote
2answers
289 views

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 ...
0
votes
1answer
356 views

Loop Bandwidth of PLL

How is the loop bandwidth of a PLL calculated? Is it the area under the Transfer Function vs. Frequency plot?
1
vote
1answer
907 views

Gyroscope Bandwidth on LSM9DS1

I am trying to read data at 119Hz and above from the gyroscope embedded in the LSM9DS1 9dof IMU package and transfer the raw data from the gyroscope to an Android device. On the Android, I plan to use ...
4
votes
2answers
959 views

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 ...
3
votes
3answers
3k views

How does the maximum transmission rate depend on the carrier frequency?

This question refers to the following excerpt from Computer Networks by Andrew Tanenbaum: The amount of information that an electromagnetic wave can carry is related to its bandwidth. With current ...
0
votes
1answer
659 views

How to calculate the transmission ( channel ) bandwidth in a digital communications system?

Is it the bandwidth ( BW ) of the individual pulse or should I generate a random process and calculate the BW from its PSD. In my class we considered it the bandwidth of the raised cosine when we were ...
2
votes
2answers
3k views

Maximum bit rate of a noise less channel

I am not able to find any source giving reason as to why the maximum bit rate in a noise less channel is twice bandwidth multiplied by log L base 2 where L is number of symbols used. What I came ...
1
vote
1answer
306 views

What bandwidth is needed for an arbitrary digital signal?

I am building a fiber-optic data link, with a laser driver and photodiode receiver. My goal is to transmit data at 50Mbit/s. I'm looking for what bandwidth this would take. Obviously 50MHz would not ...
0
votes
4answers
57 views

Remote Controlled Vehicle Design

For our term project we have to design a vehicle which has to have three functions; move forward, turn left and turn right. The vehicle will have two dc motors that will work at the same speed for ...
0
votes
1answer
4k views

What is optical bandwidth and electrical bandwidth

I was reading a book about Optical Wireless Communication. In the chapter where the transmitters are explained, there is a figure showing two types of bandwidth for LEDs. This confused me a bit, ...
-1
votes
1answer
1k views

Bandwidth-Data rate relationship

From a Data Comms textbook: These are the approximate square waves (Fig 3.7a and 3.7b): This is where the effect of changes in bandwidth on data rate is determined: The problem is the explanation/...
3
votes
1answer
1k views

Why does the 802.11b DSSS signal have 22 MHz of channel width? How does the information get spread over that width? [duplicate]

This topic has got me so much confused. In terms of Wi-Fi, when we say the 802.11b has 22 MHz of Channel Bandwidth, what does it mean? When we refer to a particular Channel No. say Channel 1, it has ...
1
vote
1answer
99 views

What frequency bandwidth should an accelerometer operate for measuring punching and kicking movements?

I'm trying to choose the bypass capacitors for a schematic circuit that measures the acceleration (in g) for punching, kicking, throwing, etc. But I don't know what to place on the x, y, z output of ...
1
vote
1answer
489 views

Ideal wireless channel (coherence time/bandwidth)

Wireless channels can be characterized as either slow or fast fading based on their coherence time and signal length. Similarly, they are either flat fading or frequency selective depending on their ...
0
votes
1answer
2k views

High speed (EDR) data transfer possible with HC-05 bluetooth module?

From what I understand, the popular HC-05 bluetooth module is using a CSR BC417 controller part, which supports EDR for 2/3 Mbps modes, also up to 3Mbaud UART interface for the mcu. Assuming the mcu ...
2
votes
1answer
1k views

Why Bandwidth Affects Response Speed

This is a follow-up question to (this question). Here is the amplifier section in question: In the answer, the author (@Brian Onn) gives the following explanation: "Slow vs. fast is not about the ...
0
votes
1answer
782 views

Measuring Q and Bandwidth of an RLC series circuit using Oscilloscope

I have a HNC Lab assignment coming up. As part of the prep for the lab work we have been given an RLC series circuit for which we had to calculate some values such as volt drop , Wn, Q and Bs, which I'...