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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Definition of signal bandwidth

From my understanding the bandwidth of an input signal to an ADC is defined as the range of frequencies the signal consists of, which is calculated as the difference between the highest and lowest ...
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Op amp advertised as BW = 105MHz, but GBP is actually 70MHz, what's being spec'd differently?

I just came about an op-amp spec where they say, "the Op-amp X is unity-gain stable with a small-signal unity gain bandwidth of 105MHz.." As you continue to read, it then says, "with a ...
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Does the bandwidth at the receiver really affects the noise in digital modulations?

I know that, in a telecommunicacion system, the AWGN power after going through the receiver filter is $$ P_z = KTB $$ where B is the bandwidth of the filter, T is the operating temperature of the ...
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If a square wave has infinite bandwidth, how can we see it on an oscilloscope?

If a square wave requires infinite bandwidth how can we display it on oscilloscopes? Link: Oscilloscope fundamentals.
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Generating a short needle pulse

I have an op-amp with a 100 MHz bandwidth. The input of this o-pamp will be a 65 MHz square wave. Can I expect to get something like a needle looking pulse? Because I am only going to have the first ...
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Two amplifiers in cascade

I want to do a simulation with two type amplifiers (PA107DP) in cascade to expand the bandwidth. How can I do ? just I connect the output of first to the input of second (out-one I connect it to -IN ...
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81 views

Bandwidth vs slew rate

I have some difficulties in understanding the difference between bandwidth and slew rate. I got that we are talking about large or small signal but what if for example the input signal is a PWM one ...
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RC noise figure calculation

I would ask for some help with noise figure calculation for circuit attached. It is front end of improvised differential probe that I would like to build. I am aware that simulators such as LTSpice ...
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Solving PLL Loop BW Transfer Function

𝑍(𝑠)= (1+𝑠.𝐢2.𝑅2)/(𝑠.(𝐴3.𝑠^3+𝐴2.𝑠^2+𝐴1.𝑠+𝐴0) C2 = 0.0000001F R2 = 1000 Ohm A0 = 0.000000106034 A1 = 1.27859848E-12 A2 = 4.5011166848E-18 A3 = 4.31278848E-24 G(𝑠)= (𝐾𝑝𝑑.πΎπ‘£π‘π‘œ.𝑍(𝑠...
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Common emitter bandwidth and probing

I am trying to design a simple RF amplifier for a 1MHz AM signal (for low-power transmission). My modulator (JFET-based) outputs ~...
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Required GBW of an op-amp

So if my Vin signal is of 50kHz and I want a gain of 50, would this mean that the GBW of the op-amp has to be at least 2.5Mhz? What happens if its below 2.5Mhz
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why sometimes we need to use Broadband Transmission (Using Modulation)?

I was reading a textbook which says: Baseband transmission requires that we have a low-pass channel, a channel with a bandwidth that starts from zero. This is the case if we have a dedicated medium(...
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What is the SINR in V2X for different vehicles sharing the same sub-channel?

I read different papers in v2x such as A Two-Stage Resource Allocation for SCMA-Based C-V2X Networks and Deep Reinforcement Learning for Resource Allocation in V2V Communications but I'm really ...
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Can I calculate minimum rise time of a transmission line if I know the length and the loss tangent?

Overview: I am trying to work out if it's possible to transmit my 1.2Gbps MIPI data down a 600mm long flexible PCB strip. Assuming I have the impedance correct, will the signal still be degraded by ...
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Reducing bandwidth of op amp to eliminate op amp parasitic oscillation

I am using few op amps to amplify a signal coming from a FGEN. My signal from FGEN is around 500Khz-7.5Mhz. Now regardless of the supply, even when the FGEN is disconnected and power the op amp using ...
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why a channel needs to have bandwidth requirement for digital data transmission?

I'm not from EE background and try to understand how digital is sent in a channel as a non technical audience. Let's say we use fiber optics to transmit digital data 010101...., since fiber optics ...
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Why does a higher bandwidth allow a higher data rate [duplicate]

I have not taken any signals processing classes yet but I am interning at ATnT in the RF department. I do not understand why higher bandwidth increases data rate and the other answers did not make ...
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How does long-distance communication requires wide bandwidth? [closed]

I'm new to EE, and I was reading an introduction book which says: long-distance communication requires wide bandwidth Can anyone give me an intuitive example to understand it? I only know that ...
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1answer
66 views

disagreement between theoretical calculation and measurement of upper cutoff frequency of a circuit based on RG58 coaxial cable

For a 100 meters RG58 coaxial cable, according to the datasheet, the capacitance of the cable is 10 nF and the inductance is of 25 Β΅H approximately. A sinusoidal voltage is applied at the input of the ...
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buffered Op-amplifier

I am trying to simulate a buffer with an op-amp using CMOS, I am using Cadence. The phase margin I am getting is negative (not stable) about -272 deg, I am trying to reach 50 deg for a gain of 86 and ...
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Testing limitations of a low bandwidth cheapie oscilliscope

Learning basic electronics. Have a few multi-meters. I'm researching "cheapie" less than $100 oscilloscopes. I read that the most important spec is bandwidth. I've noted that $40 to $100 scopes ...
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Troubleshooting butterworth bandpass gain stage issues

I am having issues solving the gain stage section of my bandpass filter design. I used a multiple feedback 6th order lowpass and a 6th order sallen-key high pass to get a bandpass filter with cutoff ...
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Can we get higher internet speeds even with low BW message signals?

Consider a case where i’m listening to a recorded audio on internet.Basically the useful audio Frequency range lies b/w 40hz to 4khz, which has a BW of 4khz which is pretty low ,does that mean the ...
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Does data rate depends on Frequency not on BW?

If we have two RF signals of 900Mhz and 1800Mhz both of equal Bandwidth 20Mhz which one has higher data rate?
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In RF433 Mhz module What is the Bandwidth and Data rate that used to transfer data?

many of document I have read it that tell me this module has 2MHz and Data rate equal to 10Kbps and using ASK modulation how did it transfer 10Kbps on 2MHz what my question is why did used a large BW ...
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Making Sense of oscilloscope specifications

When looking for oscilloscopes, you often see the following specs: bandwidth [in Hz] sampling rate [in Samples/s] capture rate [in waveforms/s] record length [in pts/channel] My question is: How are ...
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What is the relation between bandwidth and data rate?

If I have a 20Mhz bandwidth provided by my 2.4ghz router then will my internet speed will be 20M symbols per sec which is equal to 20Γ—4= 80Mbps (considering 16 qam modulator with 4 bits per symbol) Is ...
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1answer
57 views

Amplitude influence in the output signal in inverting op-amp

I testing an inverting op amp circuit in LTspice. First I observed the graphic for the gain, and calculted the bandwidth of the circuit that is 11995Hz. Then I did a simulation at that frequency, and ...
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107 views

2.6 GHz microstrip patch antenna with 100 MHz bandwidth

I'm trying to design a microstrip patch antenna @ 2.6 GHz. The result I got is good but the antenna is very selective and I haven't been able to increase the BW. Currently, the BW is 40 MHz and I ...
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1answer
57 views

what is the meaning of BLE data rate 1Mbps?

I am using BLE HM10 module which is BLE 4.0 1Mbps assume I have 1000000 data bits to send within a second, so I need 1Mbps bandwidth, Is 1Mbps only for Data bits? or 1Mbps means complete ...
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LC filter, frequency limit?

Do practical implementations of LC filters have a limited bandwidth over which they operate? ie. Would they start to attenuate less as the frequency of the input signal get very high (MHz->GHz)?
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How can I know a signal's bandwidth before sampling?

Shannon's theorem tells us the minimum sampling frequency based on the bandwidth of the signal which has to be sampled. But I wonder, how can I know the signal's bandwidth before sampling it? It is ...
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205 views

Bandwidth of pentode amplifier

Why is the bandwidth of pentode amplifier larger than the bandwidth of triode amplifier? I have searched the following books but can't find the answer: Electronics devices and circuits by Rajiv ...
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1answer
212 views

TL431 Loop Compensation

I'm trying to understand this material from C.Basso regarding TL431 compensation (Designing Compensators for the Control of Switching Power Supplies If you refer to pg.110, there is one example ...
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inclinometers signal bandwidth

the answer here suggests that inclinometers are low bandwidth devices by design. But how low is low ? Or what difference will there be between a 6.25 Hz signal bandwidth device and a 62.5 Hz one ?
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How to generate 100 A at 20 kHz?

I have interesting problem to overcome and seek some advice. I need to test different hall effect sensors and magnetic cores. I am currently stack at issue of bandwidth. I tested sensors at DC using ...
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1answer
88 views

How do Software Defined Radios have such big bandwidth?

I've noticed that the majority of "amateur" SDRs have ADCs with a sampling rate not higher than 20 MSps, but still the HackRF One for example can scan it's whole frequency range (1MHz to 6GHz) in the ...
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Why we need bandwidth with ASK?

Now I know that this question might sound silly, that is because apparently I am missing something here. Basically my question is, if ASK works as on/off keying meaning that provided we have an ...
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op amp design for bandgap

What values of the main parameters of an op amp are suitable in a bandgap reference design? The purpose is to obtain a smaller temperature drift in the range -40 to 125 C. The model I am using now is ...
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Confusion about sampling rate of a scope and its bandwidth [duplicate]

In sampling theory the BW is determined by the half of the sampling rate. But in a scope things seems to be different if I'm not mistaken. But for example if you look at the front panel of the ...
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143 views

How does the formula for calculating Low and High Frequency in a Band-pass Filter occur?

Our professor told us that we should use the formulas below to calculate the F-high and F-low frequencies that our band-pass filter should have. $$F_\text{low}=\frac1{2Ο€\,R_1\:C_1}$$ and $$F_\text{...
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287 views

Square wave spectrum and knee frequency

There is this rule of thumb to estimate the required bandwidth of a digital signal by its rise time: $$ \text{f}_{\text{knee}} = \frac{0.5}{\text{t}_{rise}} $$ This knee frequency is described in "...
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Long-tailed pair - gain and bandwidth

I'm trying to understand this schematic of this differential probe: I marked some blocks. I have some questions about the block I marked "Long-tailed pair" (LTP). I have no experience with LTPs so ...
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Is there a configuration where a circuit acts as Bandpass filter in one direction and Bandstop in other?

I am not an expert in electronics. Hence, I am looking for a broad conceptual answer. Is it possible to a directional Bandpass/Bandstop filter i.e. Bandpass in one port and Bandstop in another.
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what does bandwidth in a channel really mean?

I'm new to EE, just a question on bandwidth in a channel. The book I'm reading describe the definition of bandwidth as The term bandwidth can refer to the number of bits per second that a channel, ...
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How do I find an ADC circuit's bandwidth experimentally?

I'm trying to measure the bandwidth of a circuit that I've built. It's an analogue-to-digital converter (ADC) with some input protection and biasing. The ADC samples at a constant/fixed 50 kSa/s. ...
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How high should I make an FSK modulation index value?

After consulting with the radio manufacturer about a setup for my FSK radio module (HM-TRP), they have suggested I program it with the following values when setting up the module for 115kbps: ...
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CA3140 wideband output amplifier

The following circuit is nearly exactly what I need for the output stage of my function generator: datasheet: https://www.renesas.com/us/en/www/doc/datasheet/ca3140-a.pdf What I don't understand is ...
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Bandwidth of an oscilloscope with differential probe

I am planning to buy Rigol MSO5204 scope with a bandwidth of 200 MHz. I need to measure the timing difference between 2 (or more) signals of up to +/- 7 ns. Since this scope has 8 GS/s ...
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Sampling Frequency and Bandwidth

If i have a Buck Regulator switching at 200KHz and i want to sample the Voltage and current using OpAmp in tha path connected to ADC(12 bit). What would be the sampling frequency to measure the ...

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