johnson noise sentence in Hindi
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- Johnson noise converts heat energy into electrical energy the reverse of resistance.
- Photomultipliers offer the best possible opportunity to exceed the Johnson noise for many configurations.
- The corresponding fluctuation is Johnson noise.
- It interpolates between shot noise ( zero temperature ) and Nyquist-Johnson noise ( high temperature ).
- Thermal noise, specifically Johnson noise, involves uneven distributions of electrons or other charged particles in a system.
- In a given frequency band, the noise-power has equal contributions from every frequency and is called Johnson noise.
- If a detector is limited by either shot noise or Johnson noise then the NET can be decreased by using an increased integration time.
- As with Johnson noise, it limits, for any given setup of electrical equipment, how accurately you can measure the current running through an electrical device.
- The idea was the diode would rectify the Johnson noise thermal current flucuations produced by the resistor, generating a direct current which could be used to perform work.
- With analog filters, every component is a source of thermal noise ( such as Johnson noise ), so as the filter complexity grows, so does the noise.
- Since all resistors exhibit voltage fluctuations that are proportional to their temperature, an effect known as Johnson noise, a reduction of temperature is often the only way to achieve the required sensitivity.
- In 1928 the thermal noise in a resistor was first measured by John B . Johnson, and Harry Nyquist provided the theoretical analysis; this is now termed " Johnson noise ".
- In 1951 Herbert Callen and Theodore Welton proved the quantum fluctuation-dissipation theorem ( FDT ) which was originally formulated in classical form by Nyquist ( 1928 ) as an explanation for observed Johnson noise in electric circuits.
- In this sense, the Johnson noise of an RC circuit can be seen to be inherent, an effect of the thermodynamic distribution of the number of electrons on the capacitor, even without the involvement of a resistor.
- At those lower frequencies atmospheric noise ( static ) and man-made noise ( interference ) dominate over the noise generated inside the receiver itself ( " thermal " or " Johnson noise " ).
- The first cathode ray tube to use a hot cathode was developed by John B . Johnson ( who gave his name to the term Johnson noise ) and Harry Weiner Weinhart of Western Electric, and became a commercial product in 1922.
- 1 Hz noise floor : calculating the noise power available in a one hertz bandwidth at a temperature of " T " = 290 K defines a figure from which all other values can be obtained ( different bandwidths, temperatures ) . 1 Hz noise floor equates to a noise power of " 174 dBm so a 1 kHz bandwidth would generate " 174 + 10 log 10 ( 1 kHz ) = " 144dBm of noise power ( the noise is thermal noise, Johnson noise ).
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