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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71 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 ...
0
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1answer
34 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 ...
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1answer
83 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 ...
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0answers
31 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
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1answer
115 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 ...
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1answer
124 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 ...
2
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1answer
112 views

3-dB Frequency of second order transfer function

How can i obtain the 3db frequency of the each transfer function ? My attempt: My guess is both transfer functions have the same 3db frequency.But equating the magnitude to 0.707 gives a fourth ...
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1answer
55 views

What determines the required bandwidth of current sensors in an electric motor drive?

Most motor drive control systems incorporate current feedback of some description. What determines the required frequency response or bandwidth of the current transducer? Is there any other ...
5
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3answers
903 views

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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1answer
111 views

Loaded Q-factor of parallel RLC with series resistive load

So I have been studying resonant RLC-circuits, and have come to loaded Q-factors. At present I am trying to figure out the Q-factor of a circuit like this: simulate this circuit – ...
0
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1answer
376 views

How can I find the bandwidth of a sinc function? [closed]

I have a solved problem and it says the bandwidth of the function: $$sinc(\frac \omega {20000}) \cdot rect(\frac \omega {20000 \pi})$$ is 10 kHz. Why it is not 20 kHz or 40 kHz ?
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1answer
42 views

Throughput and speed of data transmission cables [duplicate]

What are throughput and speed limiting factors in an ethernet or any other type of cable which is used for data transmission?
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1answer
49 views

Calculations: Antenna specs; SWR, Bandwidth, Rad.Eff, Q-factor

Is it possible to give approx. answers about what an antenna is capable of? There is a lot of formuals out there, but every single one I found is based on actual measurement; input, output, SWR ...
0
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1answer
210 views

Practical Opamp integrator problem

The opamp has an unity gain of 1 MHz.So when the resistor in parallel acts a feedback to bias the opamp stable.So if not for the capacitor,the circuit would have been a inverting amplifier with ...
0
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0answers
53 views

Nyquist capacity of a noiseless channel

I am confused about the Nyquist capacity of a noiseless channel. My textbook states the result as 'A maximum of \$2B_c\$ independent pieces of information per second can be transmitted error-free over ...
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2answers
54 views

Necessary Bandwidth of Current Shunt Amplifier

I want to measure a bidirectional current using a Shunt and Current-Shunt Amplifier in High Side topology. The ADC will work at a lower sample rate (<10 kSpS) than would be required for the faster ...
2
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1answer
92 views

Operational Amplifier gain bandwidth product

If the gain bandwidth product of an operational amplifier is a constant and |Vout/Vin| is also a constant does that mean that the operational amplifier will not function for all but 1 frequency? ...
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2answers
81 views

Measuring Bandwidth of a 1e10 gain TIA

I'm trying to measure the bandwidth of a TIA with a gain of 1e9 on the first stage and 10x on the second stage. The first stage OpAmp is the LTC6268 with a 1G Ohm feedback resistor and the second is a ...
0
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1answer
42 views

Open-loop gain vs supply voltage

I have a question regarding the relationship between open-loop-gain and supply voltage. Using op270 as an example: We need to operate this device at +-5V. The datasheet has a plot (Figure 19) which ...
5
votes
1answer
415 views

What is bandwidth?

I'm having hard time understand what bandwidth really is? The book i'm using defines it as the width of a signal's spectrum (where spectrum is the range of frequencies in a signal). So, for example, ...
4
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3answers
443 views

gain, bandwidth and GBWP of current to voltage converter with op-amp

It might be a silly question since I am new to circuits and have little knowledge about it. I've learned that gain of a current to voltage convertor with op-amp is determined by feedback resistor ...
-1
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4answers
126 views

Are radio stations with higher frequency able to transmit higher quality audio?

e.g. a radio station at 100 mhz on FM vs a 50 mhz radio station. Wouldn't the latter have a lower bandwidth therefore lower quality audio/bit rate? If this is true, this must also mean that 2.4ghz ...
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1answer
125 views

Am I getting DC bandwidth correctly?

I am computing Johnson and shot noise in a DC circuit, where I have an Arduino Due sampling with "delay(100);", i.e. at 10Hz. Sampling rate and bandwidth follow Nyquist sampling theorem. According ...
0
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1answer
41 views

Can signal arrival times be a function of receiver bandwidth?

Lets assume that the speed of light is exactly \$3\!\left(\!10^{8}\!\right)\text{meters}/\text{second}\$. Suppose we have a transmitter on the surface of the earth emitting a signal at 1000 MHz and ...
3
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5answers
982 views

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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5answers
394 views

Does increasing the amplitude of a signal also increase the data rate?

I face an ambiguity when considering the carrier frequency, signal frequency, bandwidth and data rate. When I consider the Shannon formula, I wonder if increasing the transmission power also means ...
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3answers
148 views

What is the analog bandwidth of general purpose ADCs?

I am making use of the dsPIC33FJ64GP802's ADC to do Undersampling and for that, I need to know the analog bandwidth of the ADC of this Microcontroller. My signal is around a few MHz. I have already ...
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1answer
228 views

Class J RF Power Amplifier

What is a Class-J Amplifier configuration? Does it work in a push-pull configuration similar to an A/B? How is it physically different to an A/B? Where can I see a basic schematic? I have read ...
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2answers
151 views

Relation between reflection (coefficient) and bandwidth

I am reading into single stage microwave amplifiers and how to design for a specific gain (source 1, source 2 warning PDFs!). In both sources the claim is made that the highest bandwidth is achieved ...
2
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3answers
163 views

What does the bandwidth of a probe mean?

For example, when I have the P2221 ( http://www.farnell.com/datasheets/1808826.pdf ),The bandwidth when setting it to 1x, would only be 6Mhz. Looking at the input resistance and input capacitance: \$ ...
1
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1answer
43 views

Simple question on high bandwidth Opamp reproducing low frequency signals

So if one were to use a high bandwidth Opamp, at say 10GHz, and use it to reproduce a much lower frequency signal, say in 1GHz or 700MHz, would there be attenuation or degradation of the signal?? Or, ...
0
votes
2answers
807 views

Active narrow bandpass filter with variable center frequency

I want to make bandpass filter with its center frequency variable(range 50Hz to 5kHz), bandwidth the smaller the better but not less than 50Hz.The bandwidth to be same across the range should be same. ...
0
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1answer
63 views

wireless sensor baud rate calculation

I need to calculate baud rate of wireless sensor which operates on 433.92Mhz and uses OOK modulation. Signal wave form and packet structure are known. Packet = 36bit (44.7ms), each bit consists of 2 ...
0
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1answer
86 views

Why deliberately mismatch impedances in RF?

My professor wants me to design a cascaded RF amplifier, with mismatched stages. The reasoning is to increase bandwidth. Is this correct? If so, can anyone elaborate on the theory why mismatching ...
2
votes
1answer
185 views

Buffer between high pass and low pass filter when making a bandpass filter?

For a passive filter stage, I want to combine a high pass filter with a low pass filter to create a bandbass filter. Can I just make a simple RC circuit for each and connect them together? Or would we ...
2
votes
2answers
70 views

What is the closed-loop bandwidth of the INA143 at gain 0.1?

The INA143 difference amplifier datasheet states that the device supports G=10 and G=0.1 when connected in difference amplifier configuration. However, the datasheet only gives specifications for the ...
0
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1answer
188 views

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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2answers
49 views

Expected percentage of collisions for uni-directional wireless transmissions

I am developing battery-powered sensors to measure different parameters inside my house. The measurements are taken by simple AVR controllers (no Arduino) at more or less regular intervals and will ...
1
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1answer
174 views

Phototransistor bandwidth issue

I'm trying to sense IR wave with a phototransistor circuit. The circuit operates well under DC operations (I mean 3V or 0V through inputs). However, if a square wave is supplied from UART input, ...
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2answers
249 views

IR Led & Phototransistor pair bandwidth issue

I'm trying to sense IR wave with a phototransistor circuit. The circuit operates well under DC operations (I mean 3.3V through inputs). However, if a square wave is supplied from UART input, after ...
2
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3answers
803 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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2answers
785 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 ...
6
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2answers
415 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 ...
0
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2answers
88 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
94 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
219 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 ...
0
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1answer
271 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
1k 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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2answers
364 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
449 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 ...