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When two low-pass filters are cascaded the roll-off rate becomes?
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What do you understand by bandwidth of a parallel resonant circuits?
The bandwidth of a resonant circuit is defined as the distance between the two -3dB rolloff points in the response curve.
Why consider only 3dB for bandwidth calculation?
3dB of gain rolloff is a linear reduction of gain by a factor of 2. That makes it a good reference point.
Why 3 db is used in bandwidth?
The 3 dB point belongs to the cutoff frequency or the corner frequency. There the 100 % voltage is then down to 70,7 % and the power is down to 50% at the same time.
What is Victoria Beckam's middle name?
CarolineJane doe jonathen lipnicki hulio garcia cornilius Jane doe Matt rolloff anne rolloff
Does Molly Roloff have boyfriend?
No. One of the episodes she states that she never wanted a tattoo.
What do the terms dB gain and MHz range as to operational frequency mean and How do they apply to electronic antennas?
If you have a 1/4 wave antenna that is rated to use in the range of 80 - 110 MHz, the characteristic length of the antenna matches these frequencies fairly closely (will probably match the mid point frequency exactly, or 95MHz), which means the antenna "grabs" signals out of the air, and effectly filters everything outside of 80 - 110 MHz. The frequency range is (probably?) spec'd for a 3 dB rolloff at the extreme frequencies - meaning at 80 and 110MHz, the signal you will get from this antenna will be ~3dB less than the peak at 95MHz. This is standard amongst filters, I'm not sure you can make just an antenna to act this way, but there is often a tuning circuit associated with the antenna to allow this (at a basic level consisting of a single capacitor). An antenna doesn't realy have a positive gain; it is not an amplifier, but a filter. An amplifier may have a gain of +20dB; a filter will have a specified passband (up to the 3dB rolloff points), and a specified decade rolloff (of say 20dB per decade), or at least a specified minimum filtering value at a specific frequency (say 60dB at 50 and 160MHz).
What do you understand by bandwidth of a parallel resonant circuits?
The bandwidth of a resonant circuit is defined as the distance between the two -3dB rolloff points in the response curve.
What is Jeremy Rolloff's sexual orientation?
Jeremy Roloff is heterosexual, he currently has a girlfriend and several of his dating relationships have been featured on his family reality television show "Little People, Big World."
Why consider only 3dB for bandwidth calculation?
3dB of gain rolloff is a linear reduction of gain by a factor of 2. That makes it a good reference point.
What is the best size dumpster for a home clean out?
Dumpsters come in many sizes. Typical rolloff sizes are 10, 20, 30, 40 yard. They each have specific dimensions, such as length, width and height.
What actors and actresses appeared in MTV European Music Awards Pre-Party 2010 - 2010?
The cast of MTV European Music Awards Pre-Party 2010 - 2010 includes: Christine Rolloff as herself
What is rolloff in an op-amp circuit?
op-amp rolloff is an inherent low pass filter built into op-amp chips. Because op-amps have such a high gain, they are prone to breaking into high-frequency oscillation; therefore limiting the gain by frequency with a built in low pass filter helps stop this from happening. Imagine a super small signal is leaking into an op amp, because of the high gain it becomes no longer negligible and we have a high frequency signal when the output should be zero. The low pass filter lowers the gain at these High frequencies. Now, this will naturally create gain limits when designing circuits, forcing an upper bandwidth. This is adjusted for by lowering the gain you design into your circuit for the bandwidth you are dealing with (which is one of many reasons we build multi-stage amplifiers)
Could anybody please explain how exactly high pass and low pass filters work?
Filters are composed of capacitors and inductors. These component "react" differently to different frequencies. If you modulated the voltage frequency to a series capacitor, it would start out looking like a very big resistance, which would become incrementally smaller as the frequency is increased. Inductors act in the exact opposite fashion. A simple lowpass filter is compossed of a resistance and capacitor in series, with the output across the capacitor. Using a voltage divider: Voutput = Vinput * (resistance of cap) / (resistance of cap + R) A simple highpass filter is composed the same, with the output across the resistor. This type of filter is a first order filter, because there is one inductor or capacitor. Adding more of these elements will cause rippling in the frequency response, and can cause the rolloff / decay to occur faster. Putting two capacitors in series or parallel "looks" like one element, so for a second order filter you must use a cap and an inductor. For a third order, you must use two of one and one of the other "in between" them - for example have the input to a capacitor, where the other side is tied to the inductor and other capacitor; the inductor's other terminal is connected to ground, and the output is from the other capacitors second terminal.
How old is Jeremy rolloff?
Jeremy Rollof, is 20 years old as of 2010, september.
What is an Op amp Circuit?
op-amp rolloff is an inherent low pass filter built into op-amp chips. Because op-amps have such a high gain, they are prone to breaking into high-frequency oscillation; therefore limiting the gain by frequency with a built in low pass filter helps stop this from happening. Imagine a super small signal is leaking into an op amp, because of the high gain it becomes no longer negligible and we have a high frequency signal when the output should be zero. The low pass filter lowers the gain at these High frequencies. Now, this will naturally create gain limits when designing circuits, forcing an upper bandwidth. This is adjusted for by lowering the gain you design into your circuit for the bandwidth you are dealing with (which is one of many reasons we build multi-stage amplifiers)
