ELEKTRONIKAI ALAPISMERETEK ANGOL NYELVEN

Átírás

1 ÉRETTSÉGI VIZSGA 201. május 20. ELEKTRONIKAI ALAPISMERETEK ANGOL NYELVEN EMELT SZINTŰ ÍRÁSBELI VIZSGA 201. május 20. 8:00 Az írásbeli vizsga időtartama: 20 perc Pótlapok száma Tisztázati Piszkozati EMBERI ERŐFORRÁSOK MINISZTÉRIUMA Elektronikai alapismeretek angol nyelven írásbeli vizsga 1321

2 Important information You may use only a pocket calculator which cannot store or display texts, drawing tools, patterns and rulers as auxiliary tools for solving this written examination. Use a blue-ink pen for writing and a black lead pencil for drawing. When solving simple short questions, use the space below each question. When solving complex questions, use supplementary sheets to be distributed by supervising teachers. Attach a page number and your identification sign to each supplementary sheet. When solving questions which include calculations, take care to write relationships (formulas) correctly, do substitutions properly, and make calculations appropriately. If you fail on any of these aspects, points will be deducted from your score. You will be rewarded with the full score for an end-result only when the amount and the measurement unit are fully correct. When solving questions, take care to produce a neat and well organized written test, use standard symbols, and meet requirements in terms of engineering, format, and aesthetics. If you fail on any of these aspects, points will be deducted from your score. Cross erroneous parts, if any, by a diagonal line. Within the time period allocated to solve the exam, you may prepare also a fair copy. In that case, you will prepare a Draft copy and a Fair copy by attaching continuous page numbers to sheets. írásbeli vizsga / május 20.

3 Simple short questions Maximum score: 0 1.) Determine the operating temperature of a coil. The DC resistance of the coil is R 1 10 Ω at a temperature of T 1 20 C, and R Ω at the operating temperature of T 2. The temperature coefficient is: α 0.00 C -1. ( points) T 2 2.) Determine the internal resistance of the Norton equivalent circuit of the dipole below. R (3 points) 2 R R R 1 1 kω R 2 2 kω 1 R 3 R 3 3 kω R 300 Ω R i 3.) Determine the charge of capacitor C 1. (3 points) C 1 U C 2 C 3 U 12 V C 2 1 μf C 1 2 μf C 3 3 μf Q 1.) Determine the capacitance of the capacitor of an oscillator circuit. L 200 μh, f 0 50 khz. ( points) C 5.) Determine the current flowing through an R-L-C circuit connected in series. R 300 Ω, X L 600 Ω, X C 1 kω. Supply voltage: U 5 V. (3 points) I 6.) Determine the reactive power appearing across a single-phase consumer at known values of supply voltage (U), supply current (I) and effective power (P). U 230 V, I 3.3 A, P 600 W. (3 points) Q írásbeli vizsga / május 20.

4 7.) Determine the voltage U Z2 of a Zener diode at I Z2 0 ma. (3 points) U Z1 12 V at I Z1 20 ma. Differential resistance: r Z 10 Ω. U Z2 8.) Determine the common base h 11B parameter of a bipolar transistor. Known parameters of the common emitter circuit include: h 11E 3. kω, h 21E 10, h 22E 25 μs. (3 points) h 11B 9.) Determine the current amplification of an amplifier in db. The input resistance of the amplifier is R in 10 kω, load resistance is R l kω, voltage amplification is A ul 100. (3 points) a il 10.) Draw an astable multivibrator circuit. Parts: 2 NPN transistors, resistors, 2 capacitors. Indicate the parts and the polarity of the supply voltage. A neat hand-drawn diagram is acceptable. ( points) 11.) Using a Veitch-table, simplify the logic function below. The variable in the greatest place value position is denoted by A. F 3 A B C + A B C + A B C + A B C ( points) 3 F 12.) Write the disjunctive serial number form of the function below. (3 points) F Π ( 1, 2, 3, 5, 7, 9, 10, 11) F írásbeli vizsga 1321 / május 20.

5 Complex questions Maximum score: 60 Question 1 Maximum score: 15 Calculate a DC circuit R g I 1 U in R 1 I 2 R 2 I l U out R l R Ω R Ω U in 10 V The internal resistance of the generator (R g ) is negligible for the purposes of the calculations. Tasks: a) Determine the output voltage of the voltage divider with no load resistor applied (U out0 ). b) Determine the output voltage at a load resistance of R l1 5 kω (U out1 ). Determine the change in output voltage (ΔU 1 ) caused by the load resistor, in terms of percentage. c) Determine the load current (I l2 ) and load resistance (R l2 ), at which the voltage drop is 1% relative to U out0. d) Determine the highest power appearing across resistance R 2 (P 2max ). Question 2 Maximum score: 15 Calculate a capacitive coupling component R g U in C R U out R 5 kω The internal resistance of the generator (R g ) is negligible. Tasks: a) Determine the capacitance of the capacitor (C 1 ) to provide a limit frequency of f l 20 Hz. b) Determine the voltage gain (A u2 ), the capacitive reactance (X C2 ), the capacitance of the capacitor (C 2 ), and the phase shift (φ 2 ), if an attenuation of only 1 db is allowed at a frequency of f 20 Hz. c) Prepare an impedance triangle for task b) above, by indicating the resistive load, the capacitive reactance, the impedance, and the phase angle. Scale: 10 mm 1kΩ. írásbeli vizsga / május 20.

6 Question 3 Maximum score: 15 Calculate a two-stage amplifier U t U t U g R g In U in C 1 R 2 R 1 T R 3 C 3 C 2 R R 5 IC U t R 6 C Out U out R t R g 50 kω R kω R 2 12 kω R kω R 5 20 kω R kω R t 2 kω y 21S ms y 22S 20 μs The AC resistance of the capacitors are negligible. The output voltage of the operational amplifier is: U out ± 13V. Tasks: a) Determine the optimum value of resistor R. b) Determine the voltage amplification of the first and the second stages (A u1, A u2 ), and the resultant voltage amplification (A u ). The operational amplifier is considered to be ideal. c) Determine the input and the output voltages (U in, U out ) at an AC voltage with an effective value of U g 25 mv. d) Determine the effective values of the highest sinusoidal voltage and power and the input voltage corresponding to them (U outmax, P outmax, U inmax ). Question Maximum score: 15 Design a combinational network A logic function is given as follows: F Π ( 1, 2, 5, 9,11) + Σ ( 0,1, 2, 3,, 7, 9,11,13,15) Tasks: a) Write the conjunctive serial number form of the logic function F. Use A to denote the variable in the greatest place value position. b) Simplify the conjunctive function by using the graphical method. c) Realize the simplified function by using NOT, AND, and OR gates. In addition to NOT gates, you may use two-input OR and three-input AND gates. The variables are available in positive form only. d) Realize the simplified function by using NOR gates. You may use two- and three-input NOR gates. The variables are available in positive form only. írásbeli vizsga / május 20.

7 írásbeli vizsga / május 20.

8 Topic Serial no. of question Maximum score Simple short questions Complex questions Achieved points Maximum score for topic Score for the written part of the examination 100 Achieved score for topic Date:... corrected by teacher Egyszerű, rövid feladatok/ Simple short questions Összetett feladatok/ Complex questions pontszáma egész számra kerekítve/ score rounded to next integer programba beírt egész pontszám/ integer score input in computer javító tanár/corrected by teacher jegyző/notary Dátum/Date:... Dátum/Date:... írásbeli vizsga / május 20.