# 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

199 questions
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### 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 ...
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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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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 – Schematic ...
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### 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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### 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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### 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 (...
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### 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 gain ...
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### 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 ...
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### 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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### 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 ...
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### 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 ...
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### 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, ...
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### 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 <...
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### 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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### 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 ...
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### 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 ...
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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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### 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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### 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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### 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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### 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 ...
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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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### 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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### 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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### 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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### 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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### 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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### 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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### 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 ...