# 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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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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### 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

š(š )= (1+š .š¶2.š2)/(š .(š“3.š ^3+š“2.š ^2+š“1.š +š“0) C2 = 0.0000001F R2 = 1000 Ohm A0 = 0.000000106034 A1 = 1.27859848E-12 A2 = 4.5011166848E-18 A3 = 4.31278848E-24 G(š )= (š¾šš.š¾š£šš.š(š ...
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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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### 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 ĀµH 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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### 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 ...