brown, m (2001) power supply cookbook (2nd ed )

... Highest Mass High Low-medium Low-medium Low-medium RF Noise None High Medium Medium Efficiency 35–50% 70–85% 78–92% 78–92% Multiple outputs No Yes Yes Yes Development time 1 week 8 person-months a 10 ... current I out(rated) The maximum average current that will be drawn from an output. I out(min) The minimum current that will be drawn from the output during normal operation. I sc The maximu...

Ngày tải lên: 18/04/2014, 12:28

... any power se- quencing that the supply may need to provide to the system. Many items need to be considered at the system design specification stage of a sys- tem development program ... must have a reasonable understanding of the major subsections that make up a switching power supply. The subsections discussed represent a typical minimum system. Additional functionality...

Ngày tải lên: 18/04/2014, 12:25

... following: (a) mLA]C. (d) mLD]B. (b) mLCJE. (e) mLBJF. (c) mLH]C. (f) mLCJD+ mLG]D. (g) mLH]C+ mLfJE. (h) mLHJB - mLfJD. (i) mLD]G - mLBJC. oE 3;00 Ex. 24. 25. Draw AB C I such that m( AB) = 4 inches. At ... Complete: (a) mLKPL + mLLPivl - mL. (b) mLMPN + mLLPM = mL. (c)mLKPM - rnLLPM = mL. (d) mLKPN - mLl\.lPN = rnL. 27. With the aid of a protractor draw an angle whose measure is 70. Call i...

Ngày tải lên: 31/03/2014, 16:13

... CD-ROM? Programs The programs on this CD-ROM will help you learn how to program small embedded control systems. The directory named Programs contains all of the programs from the book. Programs ... separated by commas. The mandatory program function name in C is main. Every C pro- gram must have a function named main, and this function is the one executed when the program is run. Examin...

Ngày tải lên: 18/04/2014, 12:27

... transformation603 Star-delta transformation 611 Further problems on delta-star and star-delta transformations 614 35 Maximum power transfer theorems and impedance matching617 Maximum power ... Maximum power transfer theorems617 Impedance matching 623 Further problems on maximum power transfer theorems and impedance matching 626 Assignment 11629 36 Complex Waveforms631 Introd...

Ngày tải lên: 18/04/2014, 12:27

... terms of system power and 22 RF and Microwave Radiation Safety Handbook listed nine long wave (LF) and medium wave (MF) stations with powers exceeding 1 MW, most of them being rated at 2 MW. ... number of frequencies Frequency (MHz) Length – one quarter wavelength (m/ cm) 0.1 750 m 17 5m 10 7.5 m 100 0.75 m (75 cm) 1 000 0.075 m (7.5 cm) 10 000 0.0075 m (0.75 cm) Table 1.3 Frequ...

Ngày tải lên: 18/04/2014, 12:27

... noted that the maximum usable frequency (MUF) and critical frequency tend to reduce rapidly as the storm commences. An ionospheric disturbance observed over November 12–14, 1960 was preceded ... radio com- munications – and most of them (but not all) are bad. In this section we will briefly examine some of the more common forms. Sporadic E-layer A reflective cloud of ionization sometimes appear...

Ngày tải lên: 18/04/2014, 12:28

... 20 Quiz time 3 In each case, choose the best option. 1 The common windows used in fiber optic communications are centered on wavelengths of: (a) 1300 nm, 1550 nm and 850 nm (b) 850 nm, 1500 nm and ... wavelength of approximately: (a) 850 nm (b) 1550 m (c) 1350 nm (d) 1.55 m 5 The 850 nm window remains popular because it: (a) uses visible light and this allows plastic fibers to be used (b) t...

Ngày tải lên: 18/04/2014, 12:28

... colleagues bor- rowed a technique from designers of random access memory (RAM) components and large liquid-crystal-display (LCD) panels—they included redundant traces for most of the board's ... failure mechanisms depends on manufacturing-process characteristics. Board-to-board process variation, for example, tends to be most common when assembly is primarily manual....

Ngày tải lên: 18/04/2014, 12:32