radio engineering electronics and telecommunications

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Ngày tải lên: 29/03/2014, 21:55

... environmental engineering and environmental science, and the definitions provided relate to their use in an envi- ronmental context only. The commercial terms represent company brand names or trademarks, and ... herbicides, and pesticides. agricultural pollution Farming wastes, including runoff and leaching of pesti- cides and fertilizers; erosion and dust from plowing; improper disposal of animal manure and ... acquisitions. This led to an expanded directory entitled, The Dictionary of Water and Wastewater Treatment Trademarks and Brand Names , published in 1991, and which contained 1200 commercial...

Ngày tải lên: 08/10/2012, 14:44

... experiences and opinions so quickly and easily if there weren’t Internet connectivity. The Internet has really made big changes in the way many people live and work. D c) Read the text again and ... information search, and entertainment. Businesses use the Internet for advertising and electronic commerce. Organizations use the Internet for teleconferencing and telecommuting. Media and entertaining ... long distance, far.  Telecommunications /,telikə,mju:ni'kei∫nz/ = telecoms (informal): the technology of sending signals, images and messages over long distances by radio, telephone, television,...

Ngày tải lên: 24/06/2013, 01:27

... obtain the dot product and the vector product of two vectors a and b. Use the function to evaluate the dot and vector products of vectors x and y, where x = (1 5 6) and y = (2 3 8). 1.4 ... sensitive in naming variables, commands and functions. Thus b and B are not the same variable. If you do not want MATLAB to be case sensitive, you can use the command casesen off To obtain ... sign and the function name. The © 1999 CRC Press LLC © 1999 CRC Press LLC 1.6 M-FILES Normally, when single line commands are entered, MATLAB processes the commands immediately and...

Ngày tải lên: 23/10/2013, 16:15

... electrical and electrical engineering technology students and professionals who want to use MATLAB to explore the characteristics of semiconductor devices and the application of MATLAB for analysis and ... obtain the dot product and the vector product of two vectors a and b. Use the function to evaluate the dot and vector products of vectors x and y, where x = (1 5 6) and y = (2 3 8). 1.4 ... the commands loglog, semilogx, and semilogy. The use of the above plot commands is similar to those of the plot command discussed in the previous section. The description of these commands are...

Ngày tải lên: 27/10/2013, 23:15

... = 3.4 INPUT/OUTPUT COMMANDS MATLAB has commands for inputting information in the command window and outputting data. Examples of input/output commands are echo, input, pause, keyboard, ... 86, 77, 45, 67, 88, 64, 79, 75, 92, and 69 (a) Determine the number of students who attained the grade of A and F. (b) What are the mean grade and the standard deviation? 3.5 Write a ... identity matrix and disp(eye(3,3)) will result in 1 0 0 0 1 0 0 0 1 Echo The echo command can be used for debugging purposes. The echo command allows commands to be viewed...

Ngày tải lên: 27/10/2013, 23:15

... erased. The hold command holds the current plot on the screen, and inhibits erasure and rescaling. Subsequent plot commands will overplot on the original curves. The hold command remains in effect ... effect until the command is issued again. When a graph is drawn, one can add a grid, a title, a label and x- and y-axes to the graph. The commands for grid, title, x-axis label, and y-axis label ... 2.3 LOGARITHMIC AND POLAR PLOTS Logarithmic and semi-logarithmic plots can be generated using the commands loglog, semilogx, and semilogy. The use of the above plot commands is similar...

Ngày tải lên: 27/10/2013, 23:15

... power and quadrature power. Three-phase circuits are analyzed by converting the circuits into the frequency domain and by using the Kirchoff voltage and current laws. The un- known voltages and ... determination of the rms value and the average power. MATLAB has two functions, quad and quad8, for performing numerical function integration. 6.1.1 MATLAB Functions quad and quad8 The quad ... t () cos( ) =+ 10 120 30 0 π and it t () cos( ) =+ 6 120 60 0 π . Determine the average power, rms value of vt () and the power factor using (a) analytical solution and (b) numerical so- lution....

Ngày tải lên: 06/11/2013, 09:15

... yt yt yt yt n () () () . . () =                 1 2 and A, B, C , and D are matrices determined by constants of a system. For example, consider a single-input and a single-output system described by ... charging and discharging curves. Figure 5.4 Charging and Discharging of a Capacitor with Different Time Constants © 1999 CRC Press LLC © 1999 CRC Press LLC [] C = 1000 and ... K 123 10 === Ω , CC F 12 5 == µ , and L = 10 H, find and plot the voltage vt 0 () within the intervals of 0 to 5 s. Solution Using the element values and Equations (5.36) to (5.38), we...

Ngày tải lên: 06/11/2013, 09:15

... CRC PRESS LLC % given the admittance matrix Y and current vector I % Y is the admittance matrix and I is the current vector % initialize matrix y and vector I using YV=I form Y = [ 0.15 -0.1 ... the matrix Z The matrix left and right divisions can also be used to obtain the loop currents. Thus, the current I can be obtained by the MATLAB commands I V Z = (4.20) or ... 4.3. Example 4.4 illustrates the use of KVL and MATLAB to solve loop currents. Example 4.4 Find the power dissipated by the 8 Ohm resistor and the current supplied by the 10-volt source....

Ngày tải lên: 06/11/2013, 09:15

Ngày tải lên: 07/12/2013, 11:48

... CRC Press LLC and III CFFR =− α (12.3) II I EFRR =− + α (12.4) and ()() III BFFRR =− +− 11 αα (12.5) where I ES and I CS are the base-emitter and base-collector ... reference and output currents for the β F from 40 to 200. Assume that for both figures, VV CC = 10 , RK C = 50 Ω and VV BE = 07 Solution We use Equation (12.50) to calculate I R and ... for the simple current mirror and Wilson current source. Figure 12.12 Percentage Error between Reference and Output Currents for Simple Current Mirror and Wilson Current Source ...

Ngày tải lên: 13/12/2013, 01:15

... function. (b) Use MATLAB to find the poles and zeros. ( c ) Plot the magnitude and phase response, assume that C 1 = 0.1uF, C 2 = 1000 0.1uF, R 1 = 10KΩ, and R 2 = 10 Ω. V o V in R 2 R 1 V 1 C 1 C 2 ... Figure 11.12, if the open-loop gain is 106, R 2 = 24K, and R 1 = 1K, plot the frequency response for a unity gain bandwidth of 10 10 67 ,, and 10 8 Hz. 11.5 For the inverting amplifier, ... Substituting Equations (11.14) and (11.15) into Equation (11.16) we have © 1999 CRC Press LLC © 1999 CRC Press LLC Attia, John Okyere. “Operational Amplifiers.” Electronics and Circuit Analysis...

Ngày tải lên: 13/12/2013, 01:15

... the conduction band E V = energy in the valence band and k, T, m n * and m p * were defined in Section 10.1. In an intrinsic semiconductor (Si and Ge) m n * and m p * are ... direct band gap semiconductor. The energy levels of the outer electrons form energy bands. In insulators, the lower energy band (valence band) is completely filled and the next energy band (conduction ... band (conduction band) is completely empty. The valence and conduction bands are separated by a forbidden energy gap. energy of electrons conduction band 1.21 eV gap valence band energy of electrons conduction...

Ngày tải lên: 13/12/2013, 01:15

... approaches for solving I D and V D . In one approach, Equations (9.10) and (9.11) are plotted and the intersection of the linear curve of Equation (9.10) and the nonlinear curve of Equation ... 10V, and the reverse saturation current of the diode is 10 -12 A and n = 2.0. (Assume a temperature of 25 o C.) (a) Use MATLAB to plot the diode forward characteristic curve and the ... The diode current and voltage will be related by the diode equation iIe DS vnV DT = (/ ) (9.11) Equations (9.10) and (9.11) can be used to solve for the current I D and volt- age V D . ...

Ngày tải lên: 13/12/2013, 01:15

... T p () ( ) =± (8.1) and in any finite interval gt () has at most a finite number of discontinuities and a finite number of maxima and minima (Dirichlets conditions), and in addition, ... 8.1. If gt () is continuous and non- periodic, then Gf () will be continuous and periodic. However, if g(t) is continuous and periodic, then Gf () will discrete and nonperiodic; that is ... a n and b n of Equations (8.5) and (8.6) by the expression cab b a nnn n n =+∠− − 1 2 22 1 tan ( ) (8.16) In addition, c n relates to A n and φ n of Equations (8.8) and (8.9)...

Ngày tải lên: 13/12/2013, 01:15