vb.net barcode reader source code 004 mm 003 002 001 0 0 01 02 03 05 06 07 t (s) Displacement input 04 08 09 1 in Software

Painting QR in Software 004 mm 003 002 001 0 0 01 02 03 05 06 07 t (s) Displacement input 04 08 09 1

005 004 mm 003 002 001 0 0 01 02 03 05 06 07 t (s) Displacement input 04 08 09 1
Quick Response Code Reader In None
Using Barcode Control SDK for Software Control to generate, create, read, scan barcode image in Software applications.
Paint Denso QR Bar Code In None
Using Barcode printer for Software Control to generate, create Quick Response Code image in Software applications.
005 Volts
QR-Code Scanner In None
Using Barcode scanner for Software Control to read, scan read, scan image in Software applications.
QR Code Printer In C#
Using Barcode generation for .NET Control to generate, create QR Code ISO/IEC18004 image in Visual Studio .NET applications.
005 0 01 02 03 05 06 07 t (s) Bridge output voltage 04 08 09 1
Creating QR Code ISO/IEC18004 In Visual Studio .NET
Using Barcode encoder for ASP.NET Control to generate, create QR Code image in ASP.NET applications.
Create QR-Code In Visual Studio .NET
Using Barcode drawer for .NET Control to generate, create QR Code ISO/IEC18004 image in Visual Studio .NET applications.
Figure 866 Displacement and bridge output voltage waveforms
QR Code 2d Barcode Generator In VB.NET
Using Barcode printer for .NET framework Control to generate, create QR Code JIS X 0510 image in Visual Studio .NET applications.
Making Bar Code In None
Using Barcode creation for Software Control to generate, create barcode image in Software applications.
The diode peak detector is a circuit capable of tracking the sinusoidal peaks without exhibiting the oscillations of the bridge output voltage The peak detector operates by rectifying and ltering the bridge output in a manner similar to that of the circuit of Figure 847 The ideal peak detector circuit is shown in Figure 867, and the response of a practical peak detector is shown in Figure 868 Its operation is based on the recti cation property of the diode, coupled with the ltering effect of the shunt capacitor, which acts as a low-pass lter
Make Data Matrix ECC200 In None
Using Barcode drawer for Software Control to generate, create Data Matrix 2d barcode image in Software applications.
Making Code 128 In None
Using Barcode maker for Software Control to generate, create ANSI/AIM Code 128 image in Software applications.
~ vout(t)
Encoding Bar Code In None
Using Barcode creator for Software Control to generate, create bar code image in Software applications.
GTIN - 128 Generator In None
Using Barcode creator for Software Control to generate, create USS-128 image in Software applications.
vL
Make Code 2/5 In None
Using Barcode maker for Software Control to generate, create Code 2/5 image in Software applications.
Barcode Reader In Visual C#.NET
Using Barcode decoder for VS .NET Control to read, scan read, scan image in VS .NET applications.
Peak detector circuit
EAN-13 Scanner In None
Using Barcode scanner for Software Control to read, scan read, scan image in Software applications.
Barcode Encoder In Visual Basic .NET
Using Barcode generation for .NET Control to generate, create barcode image in .NET applications.
Peakdetector output voltage
Code 3 Of 9 Creator In Java
Using Barcode creation for BIRT reports Control to generate, create Code 3 of 9 image in BIRT applications.
USS Code 128 Creation In C#
Using Barcode encoder for VS .NET Control to generate, create ANSI/AIM Code 128 image in Visual Studio .NET applications.
Figure 867 Peak detector circuit
Creating Data Matrix 2d Barcode In Java
Using Barcode generation for Java Control to generate, create Data Matrix image in Java applications.
1D Barcode Drawer In Visual Basic .NET
Using Barcode generation for Visual Studio .NET Control to generate, create 1D Barcode image in .NET framework applications.
Part II
Electronics
005 004 Volts 003 002 001 0 0 01 02 05 06 07 t (s) Rectified bridge output voltage 03 04 08 09 1
005 004 Volts 003 002 001 0 0 01 02 05 06 07 08 t (s) Peak-detected bridge output voltage 03 04 09 1
Figure 868 Recti ed and peak-detected bridge output voltage waveforms
The Diode Clamp
Another circuit that nds common application is the diode clamp, which permits clamping a waveform to a xed DC value Figure 869 depicts two different types of clamp circuits The operation of the simple clamp circuit is based on the notion that the diode will conduct current only in the forward direction, and that therefore the capacitor will charge during the positive half-cycle of vS (t) but will not discharge during the negative half-cycle Thus, the capacitor will eventually charge up to the peak voltage of vS (t), Vpeak The DC voltage across the capacitor has the effect of shifting the source waveform down by Vpeak , so that, after the initial transient period, the output voltage is vout (t) = vS (t) Vpeak (830)
C + vout Clamped output voltage + + VDC vout
~ vS(t)
Source
Clamp circuit
and the positive peaks of vS (t) are now clamped at 0 V For equation 830 to be accurate, it is important that the RC time constant be greater than the period, T , of vS (t): RC T (831) Figure 870 depicts the behavior of the diode clamp for a sinusoidal input waveform, where the dashed line is the source voltage and the solid line represents the clamped voltage The clamp circuit can also work with the diode in the reverse direction; the capacitor will charge to Vpeak with the output voltage given by vout (t) = vS (t) + Vpeak (832)
~ vS(t)
Source
Clamped Biased clamp output circuit voltage
Figure 869 Diode clamp circuits
8
Semiconductors and Diodes
Volts
1 2 0 01 02 03 04 05 06 t (s) 07 08 09 1
Figure 870 Ideal diode clamp input and output voltages
Now the output voltage has its negative peaks clamped to zero, since the entire waveform is shifted upward by Vpeak volts Note that in either case, the diode clamp has the effect of introducing a DC component in a waveform that does not originally have one It is also possible to shift the input waveform by a voltage different from Vpeak by connecting a battery, VDC , in series with the diode, provided that VDC < Vpeak (833)
The resulting circuit is called a biased diode clamp; it is discussed in Example 811
EXAMPLE 811 Biased Diode Clamp
Problem
Design a biased diode clamp to shift the DC level of the signal vS (t) up by 3 V
Solution
Known Quantities: vS (t) = 5 cos( t) Find: The value of VDC in the circuit in the lower half of Figure 869 Assumptions: Use the ideal diode model Analysis: With reference to the circuit in the lower half of Figure 869, we observe that
once the capacitor has charged to Vpeak VDC , the output voltage will be given by: vout = vS Vpeak + VDC Since VDC must be smaller than Vpeak (otherwise the diode would never conduct!), this circuit would never permit raising the DC level of vout To resolve this problem, we must invert both the diode and the battery, as shown in the circuit of Figure 871 Now the output voltage is given by: vout = vS + Vpeak VDC To have a DC level of 3 V, we choose VDC = 2 V The resulting waveforms are shown in Figure 872
Focus on Computer-Aided Tools: A simulation of the circuit of Figure 871 generated
by Electronics WorkbenchTM may be found in the accompanying CD-ROM
Part II
Electronics
C + VDC +
10 5 3 0
Volts
vS(t) ~
vout
5 10 0 01 02 03 04 05 06 t (s) 07 08 09 1
Photodiodes Another property of semiconductor materials that nds common application in measurement systems is their response to light energy In appropriately fabricated diodes, called photodiodes, when light reaches the depletion region of a pn junction, photons cause hole-electron pairs to be generated by a process called photo-ionization This effect can be achieved by using a surface material that is transparent to light As a consequence, the reverse saturation current depends on the light intensity (ie, on the number of incident photons), in addition to the other factors mentioned earlier, in Section 82 In a photodiode, the reverse current is given by (I0 + Ip ), where Ip is the additional current generated by photoionization The result is depicted in the family of curves of Figure 873, where the diode characteristic is shifted downward by an amount related to the additional current generated by photo-ionization Figure 873 depicts the appearance of the i-v characteristic of a photodiode for various values of Ip , where the i-v curve is shifted to lower values for progressively larger values of Ip The circuit symbol is depicted in Figure 874
002 0015 001 Amps 0005 0 0005 001 1 0 05 1 Volts L1 : diode operation ; L2 : solar cell ; L3 : photosensor 05 + v i Light L2 L3 L1
Copyright © OnBarcode.com . All rights reserved.