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Q. What is DTMF dialling?
DTMF dialling
1. Uses push buttons
2. Uses 8 different frequencies in pairs.
3. 16 different characters can be represented.
4. The frequencies used prevent generating of harmonics.
5. Each number is represented by a high signal & low signal=
Q. Draw the basic structure of an SCR and the common circuit symbol ? The SILICON CONTROLLED RECTIFIER, usually referred to as an SCR, is one of the families of semiconductors
Q. What is the advantage of using JFET as an amplifier? As an amplifier of small time-varying signals, the JFET has a number of valuable assets. First of all it has a very high
Q. In a hundred-line exchange 24 two-motion selectors are used. Draw schematic you suggest for this exchange and illustrate its working. How many simultaneous calls can be made du
List the addressing modes supported by 8051. 1. Register addressing 2. Direct addressing 3. Register indirect addressing 4. Immediate addressing 5.Register addres
Body Effect The body effect explains the changes in the threshold voltage through the change in the source-bulk voltage, approximated by the subsequent equation: In whi
Conditional Call Instruction Similar to conditional jump instructions there are conditional call instructions also based on various flags.
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A magnetic crane used for lifting weights can be modeled and analyzed as a simple magnetic circuit, as shown in Figure. Its configuration consists of two distinct pieces of the sam
Three equal impedances of D ohms resistance and C inductive reactance are connected in a DELTA configuration. The line voltage is A00 volts. Determine the line current, phase cur
EXPLAIN UJT WITH ALL SUBTOPICS CONSISTS
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