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

28 questions with no upvoted or accepted answers
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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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49 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 ...
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207 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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1answer
546 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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960 views

Bandwidth and Carrier frequency

What is exactly the difference between the Bandwidth and the carrier frequency ? And if we have two channels with the same bandwidth but with different carrier frequency will we have different speeds ?...
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200 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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28 views

Solving PLL Loop BW Transfer Function

𝑍(𝑠)= (1+𝑠.𝐶2.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.𝐾𝑣𝑐𝑜.𝑍(𝑠...
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57 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 ...
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1answer
153 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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128 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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229 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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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(...
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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 ...
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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 ...
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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 ...
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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 20×4= 80Mbps (considering 16 qam modulator with 4 bits per symbol) Is ...
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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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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 ?
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73 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 ...
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2answers
180 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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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 ...
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122 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 ...
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1answer
68 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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121 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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115 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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55 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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72 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 ...
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2answers
97 views

Reduce output noise power while keeping input bandwidth constant

Assume our signal source has a white background noise. The output of this source is connected to our system. We know that increasing the input bandwidth of the system leads to more noise flowing into ...