barcode in vb.net 2005 At A, three-phase, 234-Vac outlet. At B, single-phase, 117-Vac outlet. in Software

Encoding QR in Software At A, three-phase, 234-Vac outlet. At B, single-phase, 117-Vac outlet.

18-9 At A, three-phase, 234-Vac outlet. At B, single-phase, 117-Vac outlet.
Denso QR Bar Code Decoder In None
Using Barcode Control SDK for Software Control to generate, create, read, scan barcode image in Software applications.
Create QR Code In None
Using Barcode encoder for Software Control to generate, create Quick Response Code image in Software applications.
In electronic devices
Quick Response Code Decoder In None
Using Barcode reader for Software Control to read, scan read, scan image in Software applications.
Generating QR Code JIS X 0510 In C#
Using Barcode creation for Visual Studio .NET Control to generate, create QR-Code image in .NET framework applications.
The lowest level of power transformer is found in electronic equipment such as television sets, ham radios, and home computers.
QR Code JIS X 0510 Generation In .NET Framework
Using Barcode drawer for ASP.NET Control to generate, create QR Code image in ASP.NET applications.
Drawing QR Code In .NET Framework
Using Barcode maker for VS .NET Control to generate, create QR Code JIS X 0510 image in VS .NET applications.
336 Transformers and impedance matching Most solid-state devices use low voltages, ranging from about 5 V up to perhaps 50 V. This equipment needs step-down power transformers in its power supplies. Solid-state equipment usually (but not always) consumes relatively little power, so the transformers are usually not very bulky. The exception is high-powered audio-frequency or radio-frequency amplifiers, whose transistors can demand more than 1000 watts (1 kW) in some cases. At 12 V, this translates to 90 A or more. Television sets have cathode-ray tubes that need several hundred volts. This is derived by using a step-up transformer in the power supply. Such transformers don t have to supply a lot of current, though, so they are not very big or heavy. Another type of device that needs rather high voltage is a ham-radio amplifier with vacuum tubes. Such an amplifier requires from 2 kV to 5 kV. Any voltage higher than about 12 V should be treated with respect. The voltages in televisions and ham radios are extremely dangerous, even after the equipment has been switched off. Do not try to service such equipment unless you are trained to do so!
QR Generator In VB.NET
Using Barcode generator for .NET Control to generate, create QR Code ISO/IEC18004 image in Visual Studio .NET applications.
Data Matrix Generator In None
Using Barcode encoder for Software Control to generate, create Data Matrix ECC200 image in Software applications.
Audio-frequency transformers
Barcode Generation In None
Using Barcode creation for Software Control to generate, create bar code image in Software applications.
Printing UPCA In None
Using Barcode generator for Software Control to generate, create UPCA image in Software applications.
Transformers for use at audio frequency (AF) are similar to those employed for 60-Hz electricity. The differences are that the frequency is somewhat higher (up to 20 kHz), and that audio signals exist in a band of frequencies (20 Hz to 20 kHz) rather than at just one frequency. Most audio transformers look like, and are constructed like miniature utility transformers. They have laminated E cores with primary and secondary windings wound around the cross bars, as shown in Fig. 18-4. Audio transformers can be either the step-up or step-down type. However, rather than being made to produce a specific voltage, audio transformers are designed to match impedances. Audio circuits, and in fact all electronic circuits that handle sine-wave or complex-wave signals, exhibit impedance at the input and output. The load has a certain impedance; a source has another impedance. Good audio design strives to minimize the reactances in the circuitry, so that the absolute-value impedance, Z, is close to the resistance R in the complex vector R + jX. This means that X must be zero or nearly zero. In the following discussion of impedance-matching transformers, both at audio and at radio frequencies, assume that the reactance is zero, so that the impedance is purely resistive, that is, Z R.
Barcode Drawer In None
Using Barcode generation for Software Control to generate, create barcode image in Software applications.
European Article Number 13 Maker In None
Using Barcode generator for Software Control to generate, create UPC - 13 image in Software applications.
Isolation transformers
Painting Code 2/5 In None
Using Barcode creator for Software Control to generate, create Code 2/5 image in Software applications.
Code 128C Scanner In Visual Basic .NET
Using Barcode recognizer for VS .NET Control to read, scan read, scan image in VS .NET applications.
One useful function of a transformer is that it can provide isolation between electronic circuits. While there is inductive coupling in a transformer, there is comparatively little capacitive coupling. The amount of capacitive coupling can be reduced by using cores that minimize the number of wire turns needed in the windings, and by keeping the windings separate from each other (rather than overlapping).
Bar Code Recognizer In None
Using Barcode reader for Software Control to read, scan read, scan image in Software applications.
EAN / UCC - 13 Generator In Objective-C
Using Barcode creator for iPad Control to generate, create EAN13 image in iPad applications.
Isolation transformers 337
Barcode Maker In Objective-C
Using Barcode generator for iPhone Control to generate, create bar code image in iPhone applications.
Encoding Code-39 In Java
Using Barcode maker for Android Control to generate, create Code 39 Full ASCII image in Android applications.
Balanced and unbalanced loads
Barcode Creation In Java
Using Barcode maker for Java Control to generate, create bar code image in Java applications.
UCC-128 Encoder In Objective-C
Using Barcode creator for iPhone Control to generate, create GS1 128 image in iPhone applications.
A balanced load is one whose terminals can be reversed without significantly affecting circuit behavior. A plain resistor is a good example. The two-wire antenna input in a television receiver is another example of a balanced load. A balanced transmission line is usually a two-wire line, such as television antenna ribbon. An unbalanced load is a load that must be connected a certain way; switching its leads will result in improper circuit operation. Some radio antennas are of this type. Usually, unbalanced sources and loads have one side connected to ground. The coaxial input of a television receiver is unbalanced; the shield (braid) of the cable is grounded. An unbalanced transmission line is usually a coaxial line, such as you find in a cable television system. Normally, you cannot connect an unbalanced line to a balanced load, or a balanced line to an unbalanced load, and expect good performance from an electrical or electronic system. But a transformer can allow for mating between these two types of systems. In Fig. 18-10A, a balanced-to-unbalanced transformer is shown. Note that the balanced side is center-tapped, and the tap is grounded. In Fig. 18-10B, an unbalancedto-balanced transformer is illustrated. Again, the balanced side has a grounded center tap.
Copyright © OnBarcode.com . All rights reserved.