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Q. Draw the complete circuit of a dual voltage source using 7805 and 7905.
A voltage regulator is a circuit that supplies a constant voltage regardless of changes in load currents. Although voltage regulators can be designed using op-amps, it is quicker and easy to use IC voltage regulators. Furthermore, IC voltage regulators are versatile and relatively inexpensive and are available with features such as a programmable output, current/voltage boosting, thermal shutdown and floating operation for high voltage applications. IC voltage regulators are of the following types
1. Fixed Output Voltage Regulators
a. Positive Voltage Regulators - IC 7800 Series
b. Negative Voltage Regulators - IC 7900 Series
2. Adjustable Output Voltage Regulators
a. Positive Voltage Regulators - IC LM317 Series
b. Negative Voltage Regulators - IC LM337 Series
Voltage regulators are commonly used for on-card regulation and laboratory-type power supplies.
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define the physical significance of damping coefficient
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Q. A silicon npn BJT is biased by the method shown in Figure, with R E = 240 , R 2 = 3000 , and V CC = 24 V. The operating point corresponds to V BEQ = 0.8V, I BQ = 110 µA,
Aloudspeaker is a common electrochemical transducer in which vibration is caused by changes in the input current to a coil which, in turn, is coupled to a magnetic structure that c
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Name the materials used in case of Solder and give reasons. Solder : For soft solders tin, lead (in 50-50 ratio) alloy and for hard solders copper- zinc and silver alloy
Q. On a CD amplifier R s = 4k?, µ =50 and r =35k?. Evaluate the voltage gain A v . A v = V o /V i = µRs / (µ+1)Rs + r
Q. Show the r’s Complement? Step1- get the (r-1)'s complement Step 2- add 1 to the result ex. 935 10 9 9 9
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