ࡱ>   bjbjpMpM 8'o_'o_%& & kkkkk8t+4hc__"\& bbbbbbb$\fi ck\\ ckk"c 2 2 24kkb 2b 2 2[DS_FY,3]&b8c0hcY]i0iLS_ikS_ 2 c c^1hci& 1:'LABORATORY WORK NR. 4 Investigation of logic elements Performed by student.Experiment performed(Academic group No.)(date and instructors signature)Work accepted(Students name)(date and instructors signature) The aim of the work have a look at digital circuits, their operation. Investigate operation principle of different logic elements. Task To investigate Logic elements operating principles, circuit diagrams and their use. Equipment Lab bench (basic laboratory work block) KL-21001. Logic element module KL-33001. Measurement instruments. Connecting wires. Workflow Explore KL-33001 module block d circuit. Logic element modules KL-33001 power supply terminal + 5 V and ground terminal  connect with modules KL-21001 appropriate terminals (Fixed power + 5 V and GND). Connect ground  terminal with Voltmeters terminal COM. Connect Voltmeters terminal DC VOLTAGE with circuits U1 terminal F1. Digital device must be set to Voltmeter (button V-A pushed out), measuring range must be set to 200 V (button 2 V 200 V pushed). Circuits U1 inputs A1 and A2 connect with block d ground terminal . Turn on modules KL-21001 power supply. Measure output voltage U1 , this voltage will represent logic 1. Turn off modules KL-21001 power suply. U1=.......... V. Use jumper to connect + 5 V terminal with one of resistors R10 terminal. Connect circuits U1 inputs A1 and A2 with block d resistors R10 second terminal. Digital device must be set to Voltmeter (button V-A pushed out), measuring range must be set to 2 V (button 2 V 200 V pushed out). Turn on modules KL-21001 power supply. Measure output voltage U0 , this voltage will represent logic 0. Turn off modules KL-21001 power suply. U0=.......... V. Use jumper to connect resistors R10 second terminal with resistor R9. Disconect circuits U1 imputs A1 and A2 from resistor R10 terminal and interconnect them. Use jumper tu connect blocks ground  and potentiometers R12 terminals. Digital device must be set to Voltmeter (button V-A pushed out), measuring range must be set to 200 V (button 2 V 200 V pushed). Turn on power supply of the KL-21001 module. Changing the potentiometer R12 change output voltage U1 from log.0 to log.1 and otherside. Determine the changeover moment. Disconect Voltmeters DC VOLTAGE terminal from circuits U1 terminal F1 and connect it to the input terminal A1. Measure logic elemts AND-NO threshold voltage Utr. Turn off modules KL-21001 power suply. Utr=.......... V. Disconnect jumpers, which connecting resistors R9 R10, and R12 ground terminal . Connect Voltmeters DC VOLTAGE terminal to circuits U1 output terminal F1. Connecting circuits U1 input terminals A1 and A2 with ground  terminal (in this case the appropriate circuits U1 input terminal will be filled with log.0) or with resistors R10 terminal (in this case the appropriate circuits U1 input terminal will be filled with log.1) fill in the table of logic element values (4.8 Table). Analyze the logic element values and determine the logic function of this element. Turn off modules KL-21001 power suply. Circuits U1 logic function: ................ .4.8 Table A1 A2 F1, V 0 0 0 1 1 0 1 1 Using circuit U1, i.e. having the total set of logic elements, construct logic circuit AND, connect it in the block d, analogically to the 6 point, fill in the table of logic element values (4.9 Table). Check if it meets logic function AND. Turn off modules KL-21001 power suply. 4.9 Table A1 A2 F3, V 0 0 0 1 1 0 1 1 Connect Voltmeters DC VOLTAGE terminal to circuits U2 output terminal F2. Connecting circuits U2 input terminals A3 and A24 with ground  terminal (in this case the appropriate circuits U2 input terminal will be filled with log.0) or with resistors R10 terminal (in this case the appropriate circuits U2 input terminal will be filled with log.1) fill in the table of logic element values (4.10 Table). Analyze the logic element values and determine the logic function of this element. Turn off modules KL-21001 power suply. Circuits U2 logic function: ................ . 4.10 Table A3 A4 F2, V 0 0 0 1 1 0 1 1 Using circuit U2, i.e. having the total set of logic elements, construct logic circuit OR, connect it in the block d, analogically to the 8 point, fill in the table of logic element values (4.11Table). Check if it meets logic function OR. Turn off modules KL-21001 power suply. 4.11 Table A3 A4 F4, V 0 0 0 1 1 0 1 1 Connect Voltmeters DC VOLTAGE terminal to circuits U4 output terminal F9. Connecting circuits U4 input terminals C4 and C5 with ground  terminal (in this case the appropriate circuits U4 input terminal will be filled with log.0) or with resistors R10 terminal (in this case the appropriate circuits U4 input terminal will be filled with log.1) fill in the table of logic element values (4.12 Table). Analyze the logic element values and determine the logic function of this element. Turn off modules KL-21001 power suply. Circuits U24 logic function: ................ . 4.12 Table C4 C5 F9, V 0 0 0 1 1 0 1 1 Connect Voltmeters DC VOLTAGE terminal to circuits U3 output terminal C1. Connect analogue voltmeter terminal + 20 V with circuits U3 uotput terminal F6, and terminal 0 with block d ground  terminal. Use jumpers to connect ground  and potentiometer R12 terminals. Connect resistors R11 terminal with circuits U3 terminal C1. Turn on power supply of the KL-21001 module. Get log.1 voltage (about 3...4 V) in the circuits output by changing potentiometer R12. Then changing potentiometers R12 resistance (increasing input voltage) reach the point when output woltages switches to log.0, measure input voltage Usl10. Set circuits U3 output voltage equal to log.0 (about 0 V). Then changing potentiometers R12 resistance (decreasing input voltage) reach the point when output woltages switches to log.1, measure input voltage Usl01. Analyze the rezults. Turn off modules KL-21001 power suply. Usl10 = .......... V; Usl01 = .......... V.     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