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
202
questions
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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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1answer
35 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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1answer
21 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 ...
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1answer
37 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 ...
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3answers
90 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 ...
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4answers
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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 ...
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1answer
38 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 ...
0
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1answer
29 views
TLC5926IPWPR Clock width
I'm using the TLC5926IPWPR in a design. It uses an SPI interface. The TLC5926IPWPR chip is on a separate PCB than the MCU that is controlling it. The Clock and SDO pin must go through a cable about a ...
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1answer
60 views
How to calculate the 3dB point?
I understand this until the final two lines. How does he get from 27.8766 to 1149.8hz and 7224.7rad/s?
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34 views
Bandwidth of triangular wave for desired linearity
I'm attempting to replicate the Wavetek Model 188 Function Generator with original circuitry. This function generator has a 'VCG (Voltage Controlled Generator)' input which allows the user to apply ...
0
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1answer
78 views
What is meant by bandwidth here?
Regarding the following text:
Dynamic Range is defined as ratio between the smallest and the largest
signals that can be measured by the system.
Smallest signal is usually the RMS Noise ...
0
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1answer
42 views
Bandwidth of voltage divider with PMOS switch
Planning to measure (varying under switching e-bike load) voltage from a battery.
To step down the voltage panning to use a voltage divider and buffer the output to an ADC via an op-amp.
To ...
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1answer
121 views
How does Nyquist bit rate formula relate Bandwidth, Signal Rate, and Bit Rate?
I know what each of Bandwidth, Signal rate, and Bit rate mean. But I am having trouble in their mathematical relationship with each other. I will use the notation of the textbook I am reading from (...
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2answers
89 views
Can't achieve the goals in designing and simulating Resonator circuit
Goals
I need to design resonant parallel circuit and simulate it with LTSpice so that it match with the design requirements correctly.
Requirements
Source Impedance \$R_s = 100\ \Omega\$
Load ...
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0answers
28 views
Choosing a position sensor (encoder) and obtaining velocity from it
How do I know how many counts per revolution I need for an encoder for my application?
I need to be able to accurately capture a 1000 Hz signal on an input side running from 1-133 rev/sec (60-8000 ...
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5answers
174 views
Please explain this formula for the relationship between bandwidth and the temporal response of a photodetector
I am reading "Optoelectronic Sensors" by Didier Decoster and Joseph Harari.
At section 1.8.2 they start explaining the relationship between rise time and bandwidth, and they give a very weird formula ...
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1answer
302 views
Optical bandwidth and electrical bandwidth
I understand the concepts of electrical and optical bandwidths, but I encountered an example problem that used the following formula to calculate the electrical bandwidth:
$$electrical bandwidth = 1/\...
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2answers
105 views
Maximum rate Shanon Hartley
i am reading computer networks and i am trying to solve an excercise.
the excercise is
What is the theoretically the maximum rate at which data can be transmitted to a 4000Hz bandwidth ...
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2answers
85 views
How does transistor bandwidth affect stability?
I was watching a video where Dave Jones of EEVBlog interviews Rod Elliot of Elliot Sound Products. Rod was discussing that he tends not to use digital chips in his designs because the chip will become ...
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20 views
Determing proper wireless parameters for HMTRP radio module
I'm trying to properly setup an HM-TRP FSK radio module to send and receive data the best it can at 56kbps.
I think I'm wrong with setting it up to use 600Khz "receive bandwidth" and 160Khz "modulate ...
0
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1answer
51 views
Frequency response of the waveguide
So, I have signal in the waveguide that is transmitted by two modes of radiation, for which the delay is for example \$\tau_1=6\,\text{ns},\, \tau_2=6.5\,\text{ns}\$, respectively. And the energy ...
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2answers
159 views
Extension of Audio Amplifier's Bandwidth
I am curious, whether extending audio amplifier's BW (bandwidth) beyond 20 kHz has any benefits compared to 2Hz-20kHz audio BW amplifier?
Some say that high-frequency -3dB point should should be ...
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2answers
216 views
Simulating and Building a Multiple Feedback Band-Pass Filter
I have a distorted signal, and only want to allow frequencies between 95kHz and 105kHz. The input voltage is at 300mV peak to peak.
Thus, I need a Pass Band of 10kHz and a Central Frequency at 100kHz....
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1answer
89 views
What is the precise meaning of “matching impedance” for an ultra-wide band antenna, and how to do that?
Well, actually, I'm not sure I really understand what is the meaning of matching impedance, even for an ordinary antenna, but I can figure out the following: if you send a signal to the antenna, then ...
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0answers
37 views
System requirement in frequency domain
Hi Can any one help understanding and interpreting figure 6a and 6b (page 6) in the paper attached down bellow :
I need to identify first the transfer function of each plot and then interpret system ...
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1answer
62 views
Constant DC Load Stability and Bandwidth slewrate
For this circuit, how do I know if the rise edge was limited by slew rate or bandwidth? What's the effect of R2 and C2 on bandwidth?
-3db of this circuit in simulation is 649 kHz, I know in ...
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2answers
781 views
How to estimate the analog bandwidth?
I have created the low cost oscilloscope and need to estimate the analog bandwidth.
I do not have any specialized equipment and just trying to estimate it by watching the response to the square ...
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0answers
104 views
How to calculate a voltage/current controller bandwidth based on their gains Kp and Ki?
I am doing some experiments with voltage and current controllers, but sometimes my results are not matching what I expected. At the moment, to calculate the bandwidth of a controller, I am taking the ...
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2answers
696 views
Calculating the frequency of data lines?
I read a calculation about determining the bandwidth of USB https://www.edn.com/electronics-blogs/all-aboard-/4425691/Rule-of-Thumb--2--Signal-bandwidth-from-clock-frequency
Roughly what was said is:
...
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0answers
102 views
Finding the Analog Bandwidth of a Voltage Controlled Oscillator
We've built a current starved voltage controlled oscillator
And tuned it so it works only in the linear region, which means it oscillations between 720-840 mV, and outputs 3.6-4.4 GHz. In order to ...
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0answers
96 views
bandwidth and phase-locked loop
I've been told that phase-locked loop (PLL) increases the bandwidth and therefore makes the time constant smaller. (\$ \tau = 2Q/\omega_0 \$ and I understand \$Q \propto 1/ \delta\omega_0 \$)
I ...
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2answers
289 views
Gibbs phenonemon in real life
If I feed a square wave into a first order, passive, low-pass filter (resistor and capacitor), I get the following results on an oscilloscope (sorry, I don't know how to scale and rotate images):
Why ...
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1answer
359 views
Parallel RLC Resonance bandwidth
Good day ,I need help in understanding a practice problem that my professor gave us.
A parallel resonant circuit has Q = 20 and is resonant at ωO = 10,000 rad/s. If Zin = 5kΩ at ω = ωO
what is ...
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1answer
38 views
IEEE 802.11b bandwidth and data rates
I am self-studying on how 802.11b bandwidth and data rates are calculated, primarily those of 1 and 2 Mbps. These are my understandings, please correct them if they are wrong. Please keep in mind I am ...
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1answer
51 views
minimum readable rise/fall times in an oscilloscope
How can I calculate minimum readable rise/fall times of a signal in an oscilloscope (from practical point of view)? Does it depend just to bandwidth and sampling rate of oscilloscope? regards
0
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1answer
69 views
Transmission and propagation
Two stations are 400km apart from each other. You have access to a 100Mbit/s full duplex radio link which transmits packet of 4000 Bytes in each direction.
What is the transmission time?
I assume ...
0
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1answer
59 views
calculating maximum sense speed of amplified phototransistor circuit
I made the following photo-transistor circuit to sense light with the exact parts shown. Resistors are 5% tolerance 1/4 watt. The circuit does work, but what I would like to know is how do I calculate ...
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2answers
158 views
What are the connection between bandwidth, Nyquist criteria and quantization?
I am trying to solve the below problem and I was not able to find the relation between bandwidth, Nyquist criteria and quantization. Can you please provide some hint?
Imagine that the possible ...
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2answers
183 views
How does widening the frequency band allows us to make faster pulses in a radio link?
I’m new to radio communication and completely ignorant in the topic. I spent some time writing software which includes calculation of the channel capacity (in bits/second or symbols/second or bauds) ...
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5answers
643 views
How do manufacturers limit bandwidth in oscilloscopes? [closed]
I would like to know how do manufacturers limit the bandwidth through software options in oscilloscopes? If i have a MSO with 1GS/s, but e.g. just have 70Mhz out of possible 200Mhz (via software ...
2
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1answer
351 views
GPU-grade memory bandwidth on low-cost FPGA solutions
I'm designing a custom FPGA board, for something low-cost like a Xilinx Spartan 6. I want to perform research about solving memory-intensive algorithms in an FPGA.
As we all know, memory bandwidth is ...
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2answers
178 views
Benefits of higher order low pass in a negative feedback loop
Let \$G(s) = \frac{Y(s)}{R(s)}\$ be the loop gain of a negative feedback loop system.
For example a system like this, where Y(s) and R(s) are the laplace
transformed functions y(t) and r(t):
...
0
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1answer
210 views
Effect of negative feedback on Amplifier
The above problem was asked in a test. I got the wrong answer because I solved it in the following way.
BW without FB = 1000 - 100 = 900
BW with FB = BW without FB * (1+A*beta) = 900 * 100 = 90kHz
...
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2answers
320 views
Transimpedance amplifier bandwidth limit [closed]
What limits the bandwidth you can achieve on a transimpedance amplifier? Why can you not take measurements at say the GHz range?
I'm guessing it has something to do with an RC element in the circuit.
...
3
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1answer
260 views
Why is the bandwidth for a matched filter twice the normal nyquist theorem one?
Why is the needed channel bandwidth for a matched filter higher than the normal bandwidth derived by the nyquist theorem (2B=R, assuming L=2)?
After some digging I found this source that states the ...
5
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1answer
84 views
What makes the band of an antenna broader than others?
Even though I'm studying waveguide slot antennas, so the examples that I'm going to give are related to this topic, my question covers a wider range of topics.
I already know about a couple of things:...
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2answers
61 views
What is the purpose of the series of actions: amplification, band-pass, rectification, and low-pass?
Can someone describe for me in simple words (if possible) what happens to a signal if we:
Amplify it by $\times 40,000$
Band pass filter it (750-5000 Hz)
Full wave rectify it
Low pass filter it (<...
2
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2answers
399 views
OpAmp Design Questions for Transimpedance Amplifier
I'm trying to improve on a transimpedance amplifier design by changing out the op-amp that I'm currently using for another one. The issue I'm facing now is that I'm unsure as to how to pick a good op-...
7
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1answer
925 views
Wideband matching network design
I have read about matching networks, authors usually will describe a target impedance to be presented, to say, the output of an amplifier, and then they design the matching network. To widen the ...
0
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1answer
61 views
Bandwidth of this amplifier?
How to correctly calculate the bandwidth of this amplifier?
My calculations of the second stage filters give me ~3-72 Hz as a result, which is right according to the datasheet. However, when I do AC ...
