Loop Structures (Visual Basic) isual Basic loop structures allow you to run one or more lines of code repetitively. You can repeat the statements in a loop structure until a condition is True‚ until a condition is False‚ a specified number of times‚ or once for each element in a collection. The following illustration shows a loop structure that runs a set of statements until a condition becomes true. Running a set of statements until a condition becomes true Introduction Visual Basic allows
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Java For Loops We’ll start with For Loops‚ one of the most common types of loops. The "For" part of "For Loop" seems to have lost its meaning. But you can think of it like this: "Loop FOR a set number of times." The structure of the For Loop is this: for ( start_value; end_value; increment_number ) { //YOUR_CODE_HERE } While Loops Another type of loop you can use in Java is called the while loop. While loops are a lot easier to understand than for loops. Here’s what they look like: while
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Count-Controlled Loops and While Loops Count-controlled: control variable (or loop counter) initial value of the control variable increment (or decrement) by which the control variable is modified each iteration through the loop condition that tests for the final value of the control variable A count-controlled repetition will exit after running a certain number of times. The count is kept in a variable called an index or counter. When the index reaches a certain value (the loop bound) the loop will
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IF STATEMENT SAMPLE 1 <?php $studentId = ’A1110601’; if ( $studentId == ’A1110601’ ) { echo ’ Student ID: ’.$studentId.’<br/>’. ’ Welcome! Inah Ysabela Marie D. Alegre’; } ?> SAMPLE 2 <?php $birthdate = ’April 8‚ 1995’; if ( $birthdate == ’April 8‚ 1995’ ) { echo ’ Birthdate : ’.$birthdate; } ?> SAMPLE 3 <?php $grade = 86; if ( $grade == 86 ) { echo ’ Passed! Your grade is ’.$grade; } ?> SAMPLE 4 <?php
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Phase Locked Loop: The phase-lock-loop (PLL) is commonly used in microprocessors to generate a clock at high frequency (Fout=2GHz for example) from an external clock at low frequency (Fref = 100MHz for example). The PLL is also used as a clock recovery circuit to generate a clock signal from a series of bits transmitted in serial without synchronization clock (Figure below). The PLL may also be found in frequency demodulation circuits‚ to transform a frequency varying waveform into a voltage.
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Communication Electronics Unlocked Acquisition Tracking(locked) ABSTRACT We were assigned to build a phase locked loop frequency synthesiser. The purpose is to help students to gain experience in hardware construction‚ coordinated teamwork and project management. The design uses 74HC4046‚ a PLL integrated circuit (IC) made from CMOS technology A PLL is a closed loop frequency system that locks the phase of an output signal to an input reference signal. The term “lock” refers to a constant
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1 A Voltage-Controlled Oscillator (VCO) is a circuit that provides a varying output signal (typically of square-wave or triangular-wave form) whose frequency can be adjusted over a range controlled by a dc voltage. An example of a VCO is the 566 IC unit‚ which contains circuitry to generate both squarewave and triangular-wave signals whose frequency is set by an external resistor and capacitor and then varied by an applied dc voltage. Figure (1) shows that the 566 contains current sources to charge
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1. Describe a local land line phone system on the following Landline Telephone Components: a. Local Loop: A local loop is a network or circuit that connects a group of telephone customers to the edge of the service provider’s network‚ no larger than 3 miles. b. Central Office: A central office is responsible for providing certain services to the local loop‚ such as‚ call routing‚ signaling‚ digit collecting. c. Local Exchanges: A system of devices or switches that direct local calls. Commonly
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the following components‚ Local Loop‚ Central Office‚ Local Exchanges‚ POP‚ Long Distance System‚ and Fixed Line. A brief description of each components are as follows: a Local Loop is a simple network that connects a home to the Central Office of the Telephone Company. It consists of twisted pair cables with a maximum length of three miles. The Central Office is an office in a locality to which a subscriber home and business lines are connected on the local loop. The Local Exchange is a service that
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POTS Local Loop The Plain Old Telephone Service (POTS) is a simple network that connects a house to the Central Office of the Telephone Company through a Local Loop. The Local Loop consists of twisted pair cables with a maximum length of three miles. Digital Subscriber Line (DSL) Local Loop The DSL System also includes a Local Loop of Twisted Pair Cable that is primarily used to connect computers and other digital equipment as well as telephones. The maximum length of this loop is 11 miles
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