kasutatavad andurid arendavad väljundpingena alalispinget. Tüüpnäide: termopaar, mille välund on 10 kuni 40mV, mis vajab kasutamiseks kindlasti võimendit. Oluliseks tunnuseks alalispinge võimendile on see et alumis sagedus piir peab olema null. Ülemine sageduspiir on tavaliselt mõni kilohertz ja see peab olema nii kõrge seepärast, et võimendi peab Rakenduselektroonika 3 regeerima ka kiiretele signaali muutustele. Ülemise sageduspiiri konkreetne väärtus sõltub kasutusvaldkonnast. 1.1.3. Ribavõimendi Ribavõimendi võimendab signaale ainult teatud kindlas sagedus vahemikus. Sagedusest f1 kuni sageduseni f2.
KEYBSG Foreign language KEYBoard program - Swiss-German KEYBSL Foreign language KEYBoard program - Czechoslovakia (Slovak) KEYBSP Foreign language KEYBoard program - Spain KEYBSU Foreign language KEYBoard program - Finland KEYBSV Foreign language KEYBoard program - Sweden KEYBUK Foreign language KEYBoard program - United Kingdom KEYBUS Foreign language KEYBoard program - United States KEYBYU Foreign language KEYBoard program - Yugoslavia KHz Kilohertz KIF Knowledge Interchange Format KIPS Kodak Internet Print Service [Kodak] KIS Knowbot Information Service [Internet] KMZ Keyhole Markup Language KPI Kernel Programming Interface KQML Knowledge Query and Manipulation Language KRS Knowledge Retrieval System KSDS Keyed Sequential Data Set KSH Korn Shell (program) [Unix] KSPH Keystrokes Per Hour KSR Keyboard Send Receive KVM Keyboard, Video, Mouse (switch) + Kilobyte Virtual Machine L... | TOP | UP to K | DN to M | BOTTOM |
dard bus, such as PC/104 or VME. The power supplies on these buses are often not suitable for analog components. They are often noisy, and you don’t always get the voltages you need. Many computer systems, such as PC/104, operate with 5v only, or with 5v and 12v only. In some cases, you can fix a noisy supply by adding LC filters, as shown in Figure 9.7A. The inductor and capacitor must be selected to filter out the power-supply switching frequency, which is usually in the tens of kilohertz. In some applications, you need different voltages than that supplied on the bus to which you’re interfacing. An analog input that has to accept ±12V Figure 9.7 DC-DC converters in analog circuits. 226 Analog Interfacing to Embedded Microprocessors inputs but is operating from a 5V only system is a typical example. Figure 9.7B shows how DC-DC converters can be used to produce additional voltages.
izes a type of relaxation that occurs in a spe- by the rotation of amino acids, the rotation of cific frequency range and which allows the charged side groups of proteins, and the identification of different phenomena. The relaxation of protein-bound water (Schwan dispersions of biological systems have been 1981). The α-dispersion dominates between widely studied by many authors (Grant et al. millihertz and a few kilohertz, and is not yet 1978; Schanne and P-Ceretti 1978; Pethig completely understood. Some hypotheses 1979; Stuchly 1979; Schwan and Foster remark the counter-ion effects near the mem- 1,00E+08 1,00E+07 e¢ 1,00E+06 1,00E+05 1,00E+04 1,00E+03 1,00E+02
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