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
242
questions
0
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2answers
76 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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0answers
29 views
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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0answers
28 views
Solving PLL Loop BW Transfer Function
π(π )= (1+π .πΆ2.π
2)/(π .(π΄3.π ^3+π΄2.π ^2+π΄1.π +π΄0)
C2 = 0.0000001F
R2 = 1000 Ohm
A0 = 0.000000106034
A1 = 1.27859848E-12
A2 = 4.5011166848E-18
A3 = 4.31278848E-24
G(π )= (πΎππ.πΎπ£ππ.π(π ...
0
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2answers
68 views
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 ~...
1
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5answers
72 views
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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0answers
38 views
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(...
0
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0answers
18 views
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 ...
3
votes
0answers
32 views
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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0answers
58 views
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 ...
0
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1answer
47 views
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 ...
1
vote
2answers
101 views
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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1answer
75 views
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 ...
1
vote
1answer
64 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 ...
0
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0answers
30 views
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 ...
0
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2answers
76 views
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 ...
0
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0answers
45 views
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 ...
0
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2answers
49 views
Can we get higher internet speeds even with low BW message signals?
Consider a case where iβm 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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3answers
54 views
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?
-2
votes
1answer
50 views
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 ...
0
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3answers
66 views
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 ...
0
votes
1answer
38 views
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 20Γ4= 80Mbps (considering 16 qam modulator with 4 bits per symbol)
Is ...
2
votes
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 ...
5
votes
1answer
101 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 ...
1
vote
1answer
56 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 ...
0
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0answers
35 views
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)?
3
votes
5answers
788 views
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 ...
2
votes
2answers
193 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 ...
2
votes
1answer
165 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 ...
0
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0answers
19 views
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 ?
2
votes
2answers
178 views
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 ...
1
vote
1answer
87 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 ...
0
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4answers
109 views
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 ...
0
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0answers
74 views
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 ...
0
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0answers
57 views
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 ...
0
votes
2answers
128 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 $$F_\text{...
0
votes
3answers
232 views
Square wave spectrum and knee frequency
There is this rule of thumb to estimate the required bandwidth of a digital signal by its rise time:
$$
\text{f}_{\text{knee}} = \frac{0.5}{\text{t}_{rise}}
$$
This knee frequency is described in "...
6
votes
1answer
418 views
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 ...
0
votes
1answer
46 views
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.
0
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1answer
48 views
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, ...
5
votes
3answers
1k views
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.
...
1
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1answer
51 views
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:
...
3
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0answers
53 views
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 ...
3
votes
1answer
68 views
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 ...
0
votes
1answer
70 views
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 ...
0
votes
1answer
47 views
feedback loop component dc converter
Consider the schematics below, the switching frequency is 250KHz, So, The cross over frequency be 250/5 = 50KHz. My ADC is able to sample at 1MS/s which is good as from the SNR perspective.Now, the ...
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2answers
39 views
Bandwidth and Data Rate FSK Demodulations
I have a question about the data-rate limitations imposed from bandwidth for FSK signals. Suppose I transmit an FSK signal with frequencies as:
$$f_1 = 2400 MHz,$$ and $$f_2 = 2401 MHz$$
that is ...
0
votes
1answer
50 views
Convering bandwidth (frequency) to bit rate without knowledge of the modulation?
How would i convert a bandwidth of say 30kHz to bps if I only know the number of bits per sample (4)? (and I was using a two chanel system). I am assuming it is simply 30KHz * 2 * 4 but this may be ...
1
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3answers
144 views
Bandwidth and stability of nonlinear circuit
I'm designing an antilog amplifier which produces an exponential output (0.4 mV to 4 V) for a 50 Hz sawtooth input waveform (4 mV to 4 V ramp). If this were a linear circuit, I could determine the ...
8
votes
4answers
2k views
Why do OOK transmissions have bandwidth?
With on-off keying, you have a single carrier wave at a constant frequency transmitting its presence or absence. Now I understand that the crystal will not be perfect so you will have some minimal ...
0
votes
1answer
136 views
Determining sensor bandwidth
I'm currently working on a project making use of ultrasonic proximity sensors. Unfortunately it seems as though well-documented ones are very few and far between (when compared to PIC or MOSFET ...
