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Common-mode rejection ratio of an ideal amplifier?
The common mode rejection ratio of an ideal amplifier is infinity.
What is pre-emphasis and de-emphasis in FM?
In FM, the effect of noise is more on higher frequencies when compared with low frequencies. Therefore in order to have high signal-to-noise ratio(low noise), the high frequencies are amplified at the transmitter side and for compensation deemphasis(decreasing the amplitude of those boosted frequencies ) is done at receiver.
In a broadcast superheterodynes receiver having no RF amplifier the loaded Q of the antenna coupling circuit is 100. If the intermediate frequency is 455 kHz. The rejection ratio at 25 MHz will be?
The rejection ratio (R) of a superheterodyne receiver can be calculated using the formula ( R = Q \times \frac{f}{\Delta f} ), where ( Q ) is the loaded quality factor, ( f ) is the frequency of interest, and ( \Delta f ) is the bandwidth of the receiver. Given that the loaded Q is 100 and the intermediate frequency (IF) is 455 kHz, the bandwidth can be approximated as ( \frac{f_{IF}}{Q} = \frac{455 \text{ kHz}}{100} = 4.55 \text{ kHz} ). At 25 MHz, the rejection ratio becomes ( R = 100 \times \frac{25,000 \text{ kHz}}{4.55 \text{ kHz}} \approx 550,000 ). Thus, the rejection ratio at 25 MHz is approximately 550,000.
What is Supply voltage rejection ratio?
Supply Voltage Rejection Ratio (SVRR) is a measure of how well a circuit, typically an amplifier or regulator, can maintain its output stability despite variations in the supply voltage. It is defined as the ratio of the change in supply voltage to the resulting change in output voltage, often expressed in decibels (dB). A higher SVRR indicates better performance, as it means the output is less affected by fluctuations in the supply voltage, which is crucial for ensuring consistent operation in electronic systems.
Why pre emphasis is done after modulation?
No, Pre-emphasis is done before modulation. We need it to do for improving the SNR ratio of the signals of higher frequencies. Actually this boosting of weaker higher frequencies of data signals. (Asked question is a sort of trap question usually asked in viva or interview.... ;) )
What is common mode rejection ratio Explain briefly?
common mode rejection ratio is defined as ratio of differential voltage gain to common mode voltage gain Common mode rejection ratio is the ability of the circuit to reject common entries like noise.
Common-mode rejection ratio of an ideal amplifier?
The common mode rejection ratio of an ideal amplifier is infinity.
What math had to go into the making of the radio?
Ratio between the frequencies of the speakers
What is CMRR?
CMRR is common mode rejection ratio. it is the ratio of Differential gain to common mode gain. CMRR=Ad/Ac
What are the characteristics of instrumentation amplifier?
a high common mode rejection ratio, high impedance
What is the arithmetic meaning of harmony?
Two notes sounded together, whose frequencies are in the ratio of small integers.
Is there a mathematical definition for musical dissonance?
The larger the whole number corresponding to the ratio of frequencies of combined tones is, the more dissonant they sound together. Example: Smallest possible whole-number ratio of 2 frequencies = 2/1 = 2 . . . the "octave". Larger ratios sound more dissonant.
What is pre-emphasis and de-emphasis in FM?
In FM, the effect of noise is more on higher frequencies when compared with low frequencies. Therefore in order to have high signal-to-noise ratio(low noise), the high frequencies are amplified at the transmitter side and for compensation deemphasis(decreasing the amplitude of those boosted frequencies ) is done at receiver.
What is CMR Ratio?
CMR is Common Mode Rejection, and it is a measure of how well a balanced amplifier rejects a common mode signal, i.e. one that appears on both signal lines, such as one that would be induced by noise. The CMRR, Common Mode Rejection Ratio is the powers of the differential gain over the common mode gain, expressed in decibels.
What is the standard frequency between two adjacent musical notes?
The musical interval between two notes depends on the ratio of their frequencies. An octave is a ratio of 2:1 and, in equal temperament comprises 12 equal semitones, which therefore have a ratio of 21/12.
In a broadcast superheterodynes receiver having no RF amplifier the loaded Q of the antenna coupling circuit is 100. If the intermediate frequency is 455 kHz. The rejection ratio at 25 MHz will be?
The rejection ratio (R) of a superheterodyne receiver can be calculated using the formula ( R = Q \times \frac{f}{\Delta f} ), where ( Q ) is the loaded quality factor, ( f ) is the frequency of interest, and ( \Delta f ) is the bandwidth of the receiver. Given that the loaded Q is 100 and the intermediate frequency (IF) is 455 kHz, the bandwidth can be approximated as ( \frac{f_{IF}}{Q} = \frac{455 \text{ kHz}}{100} = 4.55 \text{ kHz} ). At 25 MHz, the rejection ratio becomes ( R = 100 \times \frac{25,000 \text{ kHz}}{4.55 \text{ kHz}} \approx 550,000 ). Thus, the rejection ratio at 25 MHz is approximately 550,000.
What makes certain frequencies/notes musical?
Musical frequencies and notes are determined by the specific vibrations they produce. These vibrations create patterns that our brains recognize as harmonious and pleasing. The mathematical ratios between frequencies, like the 2:1 ratio of an octave, are what make certain notes sound musical. Unlock the healing power of music! Shop Healing Frequencies Instruments at Brooklyn Healing Arts now!
