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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How does a chipset determine which LTE bands it supports?

Take the snapdragon 800 and 801 chipsets. Both use the same hexagon DSP http://pages.cs.wisc.edu/~danav/pubs/qcom/hexagon_hotchips2013.pdf But a phone on verizon will only support LTE bands 4 and ...
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3answers
289 views

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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38 views

Latency of DDR RAM operation compared to bandwidth capacity for two memory modules at a given clockspeed

I've wondered this for a while and I need some help conceptualizing it. Why isn't Nanoseconds of latency a good measurement of speed for comparing two different memory modules, both with the same ...
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0answers
76 views

Finding the bandwith of FM by using Bessel functions with 1% rule

Question A 100-MHz carrier is frequency modulated by a 10-kHz sinusoid so that the peak frequency deviation is 30 Hz. Using Bessel functions with 1% rule, i.e. 40 dB down from the unmodulated ...
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1answer
64 views

Link Capacity and the Shannon-Hartley Theorem

I'm reading Computer Networks: A Systems Approach by Peterson and Davies. One of the examples demonstrates the relationship between link capacity and the Shannon-Hartley Theorem. We can find the ...
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2answers
188 views

Observing effect of household appliances on powerline communication

I had been recently working on Powerline communication modems (PLC). I put two PLC modems at different parts of my home and observed the data transfer rate between them. However, I observed that when ...
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2answers
68 views

How does the bandwidth have something to do with speed

They are saying that, if the bandwidth of a certain device becomes narrow, then its speed decreases. However, how does the speed has something to do with the bandwidth? If you are saying that the ...
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2answers
38 views

Measuring band-limited noise coming from an amplifier

I have a strain gauge amplifier and from my analysis, it will produce a low level of white noise above approximately 1kHz i.e. the power spectral density is flat above 1kHz. If I measure the output ...
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2answers
87 views

Determining Bandwidth of any circuit

I am getting familiar to SNR, noise calculations, thanks to this forum, however I often come across Bandwidth of the system to calculate resistor noise, to get rms noise from nV/rt-Hz, etc. I have a ...
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1answer
83 views

Gain bandwidth product of op-amps

What is the gain bandwidth product of an amplifier? (What does it mean?) How can I find the gain bandwidth product for an amplifier which has a gain of -100?
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2answers
60 views

Bandwidth of low pass filter

Say I have some low pass filter of the form: $$G(s) = \frac{a}{s+b}$$ How do I find the bandwidth? I know for example that with bandpass filters it's the difference between +-3dB of the cutoff ...
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96 views

Why is “throughput” called “bandwidth”?

But back in school, I had learned that the "bandwidth" of a communication channel is the frequency of the highest-frequency signal minus that of the lowest-frequency signal that it can carry. Yet in ...
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2answers
111 views

What is “M” in Hartley's law?

If Hartley's law is: $$ C = 2 B \log_2 M $$ I know this equation is part of calculating the capacity of a channel. I also understand that: \$C\$ is the digital bandwidth, in bits/second \$B\$ is ...
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1answer
80 views

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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2answers
673 views

Signal rate, data rate and bandwidth in digital signals

I'm trying to understand the concept of signal rate and the relation between signal (baud) rate and bandwidth of digital signals from a book about data communication. First, the book distinguishes ...
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1answer
194 views

Bandwidth vs sample rate in SDR

In software defined radio (SDR) I often see sample rate and bandwidth interchanged or maybe I'm misunderstanding... If an sdr can sample a 2 MHz wide slice of rf spectrum does that imply it would be ...
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1answer
71 views

USB Hub bandwidth problem [closed]

I will use a Beaglebone Black with a powered USB Hub to control a USB Microphone (PCM2912A) and a USB HDD. The task consists in recording and writing the Audio directly into the HDD... Will I have ...
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1answer
76 views

frequency allocation for telecommunication companies

For a high bit rate in data communication we need a high bandwidth. Suppose there are hundreds of carriers in a particular region and they are all allocated microwave frequencies. Minimum spacing ...
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3answers
216 views

Noise control in op-amp circuit design by using low spec op amps

I have a rather strange problem. I have a breadboard circuit on a double sided PCB with plenty of ground plane and a good well decoupled power supply. I am amplifying a small medium frequency signal ...
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1answer
125 views

Practical Limit of Feedback Control Systems WRT Bandwidth

In a digital feedback control system, I'm interested in the practical limit of what the correctable bandwidth is. For example, given a very simple system: A sensor can sample a simple X position ...
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2answers
114 views

Merit and meaning of fractional bandwidth

What is the merit of fractional bandwidth? $$f_{fractional}=\frac{f_{higher}-f_{lower}}{f_{mid}}$$ The same absolute bandwidth will have a smaller fractional bandwidth, if the mid frequency is ...
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1answer
92 views

Transimpedance amplifier bandwidth

I'm planning to use an Avalanche Photodiode (APD) to perform sequential light sensing - something around 100 readings under a minute. From my calculations this implies a frequency of around 1.67~2Hz. ...
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1answer
78 views

Using filters to reduce bandwidth of received signal

I am doing some radio work, and I assume you can use a bandpass filter to reduce the bandwidth of a received signal. The application is modifying schematics for a FM broadcast receiver to a 5-25 kHz ...
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1answer
44 views

Loss of speed on error-free aDSL line [closed]

Is there such a thing as an old telephone line? Does a POTS cable deteriorate over time? I am talking about lines in area where no one lived 75 years ago. Sometimes a customer using an asymmetric DSL ...
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1answer
55 views

The bandwidth Ω of a low-pass signal f(t) ↔ F(ω)

I'm not sure about the answers to the two parts of this question: The bandwidth Ω of a low-pass signal f(t) ↔ F(ω) is defined by the constraint: $$ \frac{1}{2\pi } \int_{- \Omega }^{\Omega } ...
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1answer
54 views

finding out the bandwidth of m(t)*m(t) if the bandwidth of m(t) is a known quantity

m(t)*m(t) in time domain is equivalent to the convolution of m(w) and m(w) in frequency domain.Thus if the bandwidth of m(t) is a known quantity then how is the bandwidth of m(t)*m(t) is determined?
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2answers
406 views

RF Narrow bandpass filter (crystal ladder)

I am currently designing a narrow band pass filter at around 8Mhz, using the crystals having a resonance frequency of 8Mhz. Using the tutorial from ...
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31 views

Optimizing a data link

I am running into trouble trying to optimize a VSAT running at 4096kb/s QPSK modulation. I've found that using a more advanced modulation scheme permits more bits per baud to be transmitted. But ...
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2answers
88 views

Choosing Oscilloscope with appropriate bandwidth for Jitter analysis

Can someone give me a rule of thumb of choosing Oscilloscope with appropriate bandwidth for the Jitter analysis of clock signals? What device is highly preferable: spectrum analyzers, frequency ...
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1answer
118 views

Application and uses of particular band pass filters

What are the uses of active inverting band pass filters? Also what are the uses of an infinite gain multiple feedback active band pass filter? Circuits on here: ...
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5answers
504 views

Does the fundamental frequency affect the bit rate on a wire?

This is from the book Computer Networks by Tennenbaum: The bandwidth is still the width of the band of frequencies that are passed, and the information that can be carried depends only on this ...
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0answers
81 views

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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1answer
215 views

closed loop gain and bandwith calculation

For school I have to solve this schematic (For connection 7), but I have no idea how to do this. They ask me to calculate the bandwith and the Closedloop gain in dB. Edit: High Resolution Image
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3answers
583 views

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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1answer
227 views

Problem with TDA2050_single_application_Circuit

I have many problems with TDA 2050. Why TDA2050 use high-pass filters? What is the bandwidth of it? Does the range of bandwidth is from the range of frequencies below the human hearing?(20-20KHz) I ...
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2answers
111 views

What is the bandwidth of an imaginary convolution?

I am trying to figure out the bandwidth of \$f_1f_2\$, where \$f_1 = sinc^2(3t)\$ and \$f_2 = sin(100t)\$. So when I take the Fourier Transform, I can rewrite the equation as such: \$F(\omega) ...
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1answer
128 views

Parallel resonant circuit problem

Before I start, YES this is for homework so I dont expect a full answer. Just a pointer to the right method would be helpful. I have a parallel resonant circuit. My known value is the value of the ...
2
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1answer
372 views

Theoretical break frequency and bandwidth of notch filter

I'm trying to learn how to calculate the bandwidth and break frequency for the notch filter shown below. I was told that wye-delta and delta-wye transformation would be needed, but don't fully ...
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3answers
674 views

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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1answer
636 views

How does a zero in transfer function affect the bandwidth of a system

Suppose we have a system with the closed-loop gain: \$\displaystyle G(s) = \frac{\omega_n^2}{s^2 + 2\zeta\omega_n+\omega_n^2}\$ Which is the default two-pole system closed-loop gain. Let's also ...
4
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1answer
183 views

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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1answer
72 views

any way to boost data transmission in GPIB?

I have a pretty old device connected to computer with GPIB (IEEE 488 standard), the bandwidth is limited so it is pretty slow to transmission 1MB data. I wonder if it is possible to boost the ...
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5answers
220 views

What decides the range of FM band?

I read that the frequencies over which FM signals can be transmitted is limited between 88 MHz and 108 MHz. Why is it confined to a particular range and why specifically to this (88 MHz to 108 MHz) ...
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1answer
52 views

Calculate balance between signal and noise to allow 32 kbit/s transfer

I have to calculate proper balance/ratio between signal and noise ( S/N ) in decibels ( dB ), to be able to transfer data over the channel at 32 kbit/s. Channels bandwidth is 100 kHz. I was given ...
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1answer
623 views

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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4answers
3k views

How to find lower 3dB and upper 3dB from PSPICE frequency response

I have simulated the frequency response of an amplifier circuit. Frequency range is from 10 Hz to 2.5 MHz. It gave me a plot with a y-axis range going from -50 to 50. I assume these are dBs but I am ...
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3answers
215 views

How do I decide the bandwidth of a driver through 'input transition rise and fall rate'?

I am carrying out a design with a driver:74LVC1G125 datasheet of 74LVC1G125. Signal that will go through this driver is about 600khz so I have to know the bandwaidth of 74LVC1G125. I have read the ...
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3k views

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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1answer
1k views

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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1answer
202 views

estimate SNR improvement due to filter bandwidth of low pass filter

I facing a problem in GSM simulation. I am having a perfect GMSK modulated (I can assume that GMSK filter is 200kHz or 270 kHz band limited) signal in Tx path adding AWGN of 6dB SNR (Noise 6dB below ...