ELEKTRONIKAI ALAPISMERETEK ANGOL NYELVEN

Átírás

1 ÉRETTSÉGI VIZSGA május 13. ELEKTRONIKAI ALAPISMERETEK ANGOL NYELVEN KÖZÉPSZINTŰ ÍRÁSBELI VIZSGA május 13. 8:00 Az írásbeli vizsga időtartama: 180 perc Pótlapok száma Tisztázati Piszkozati NEMZETI ERŐFORRÁS MINISZTÉRIM Elektronikai alapismeretek angol nyelven írásbeli vizsga 1021

2 Important information You may use a non-programmable calculator as the only auxiliary tool for solving this written examination. You must use a blue ink pen for writing and a black lead pencil for drawing. When solving simple short questions, use the free space below each of them in the exam sheets. When solving complex questions, use supplementary sheets to be distributed by supervising teachers, by writing your name and class on them. Write a page number on each supplementary sheet. When solving questions requiring calculations, take care to write down formulas correctly; to make substitutions properly; and to carry out calculations accurately. If you fail to meet any of these requirements, your score will be reduced. You will receive full points for an end result only when its amount and measurement unit are both correct. When solving questions, take care to produce a neat and well-organised written answer; to use standard symbols; and to meet requirements in terms of engineering, format, and aesthetics. If you fail to meet any of these requirements, your score will be reduced. When making any mistakes in your solution, cross the relevant part by a diagonal line. Within the time frame available for solving questions, you may prepare a fair copy too. In that case, you will prepare a Draft copy and a Fair copy by applying continuous page numbering. írásbeli vizsga / május 13.

3 Simple short questions Maximum score: 40 1.) Complete the table below by using the sample in the first column. (4 points) 75 mv 330μ H 180MHz 47 pf 15 nc V 2.) Determine the value of the terminal voltage ( t ). Data: 0 6 V, R in 5 Ω, R l 25 Ω. R in 0 t R l t 3.) Determine the maximum allowable value of voltage that may be connected to the resistor. Data of the resistor: R 200 Ω, P max 0.5 W. R max 4.) Determine the resultant charge that can be stored in the three capacitors. Data: 40 V, C μf, C μf, C μf. C 1 C 2 C 3 Q 5.) Complete the table with the missing capacitive reactance values. Frequency is held constant. C (nf) X C (kω) 72 6.) Determine the value of the current flowing through the circuit below. Data: 6 V, R 1.5 kω, X L 3 kω, X C 5 kω. I (4 points) R X L X C I írásbeli vizsga / május 13.

4 7.) Determine the current flowing through the Zéner diode. Data: in 9 V, out 6 V, R 150 Ω. R in Z out I z 8.) Complete the chart below with a Graetz rectifier circuit. The circuit must also include a buffer capacitor with the polarity marked. (4 points) Tr in 9.) Determine the voltage amplification of an unloaded common emitter amplifier basic circuit. Data: h 11E 4 kω, h 21E 180, h 22E 25 µs, R C 3 kω. (4 points) A u 10.) Draw a Darlington circuit by using 2 NPN transistors. Determine the resultant forward voltage when the forward voltage of each transistor is 0.6 V. in 11.) Write down the disjunctive normal form of the logic function below. F 3 A B C + B C + A C 3 F 12.) Write down the disjunctive serial number form of the logic function below. F 3 Π 3 (1,4,6,7) 3 F írásbeli vizsga / május 13.

5 Complex questions Maximum score: 60 Question 1 Maximum points: 15 Work out a DC network An electromagnet subjected to a DC voltage of 6 V has a coil made of a copper wire with a diameter of 0.5 mm. The current flowing through the coil is I 0 0.5A at a temperature of T 0 20 C; and I op 425 ma at the operating temperature of T op. The voltage and the geometrical dimensions of the wire of the coil are considered to be constant. Tasks: a) Determine the DC resistance of the coil at a temperature of 20 C (R 0 ), and at the operating temperature (R op ). b) Determine the cross section (A) and length (l) of the wire of the coil. Ω mm 2 ρ at a temperature of 20 C. m c) Determine the operating temperature of the coil (T op ). 1 α at a temperature of 20 C. C Question 2 Maximum points: 15 Work out a C-R coupling stage in C R out Data: in 10 mv C 4.7 µf R 4 kω Tasks: a) Determine the limit frequency (f l ) of the C-R stage. b) Determine the capacitive reactance of the capacitor and the current flowing through the circuit at a frequency of f 20 Hz (X C, I). c) Determine the voltage appearing across the capacitor and the resistor at a frequency of f 20 Hz ( C, out ). d) Determine the vector diagram, with proper directions, of the voltages of the circuit (a neat hand-drawn chart will be accepted). Determine the absolute value of the phase angle (φ) between the input and output voltages. írásbeli vizsga / május 13.

6 Question 3 Maximum points: 15 Work out bias resistors R B V R B2 R C +6 V T +2 V R E +10 V 0 V Data: I C0 2 ma (bias collector current) B 80 (DC current amplification factor) The bias voltages relative to the ground are specified in the chart. The current flowing through resistance R B2 is equal to ten times the bias base current. Tasks: a) Determine the exact values of the bias base- and emitter currents (I B0, I E0 ). b) Determine the values of the collector- and emitter resistors (R C, R E ). c) Determine the values of the base dividing resistors (R B1, R B2 ). Question 4 Maximum points: 15 Design a logic network The algebraic form of a logic function is given as follows: _ F 4 A B C D + A B C D + A B C D + A B C D + A B C D + A B C D + + A B C D + A B C D + A B C D + A B C D The variable of the highest place value is marked as A. Tasks: a) Write down the disjunctive serial number form of the function. b) Simplify the disjunctive function by using the graphical method. c) Realize the simplified function by using NOT, AND, and OR gates. írásbeli vizsga / május 13.

7 írásbeli vizsga / május 13.

8 topic serial number of question maximum points Simple short questions Complex questions points achieved maximum score of topic Score of written examination 100 score achieved for topic Corrected by teacher Date:... Egyszerű, rövid feladatok/ Simple short questions Összetett feladatok/ Complex questions pontszáma egész számra kerekítve/ score achieved rounded up to the next integer programba beírt egész pontszám/ integer score entered in software application javító tanár/corrected by teacher jegyző/notary Dátum/Date:... Dátum/Date:... írásbeli vizsga / május 13.