Logic Systems N6 — Document

August 2018 — N6 — Logic Systems

N6 2018 Nated Engineering

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🎯 100 marks ⏱️ 3h 📄 6 pages 📝 32 items found

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Q1— Section header —

1.10\in the ANSWER BOOK.

1.1The series digital to analogue converter works basically as a differentiator.

1.2Programmable Logic Controller ('PLC'\ contains a microprocessor.

1.3The computer used to program a PLC contains a microprocessor.

1.4The Schmitt rigger produces a pulse type waveform as output.

1.5The instruction register holds both the op code and the operand address of the current instruction.

1.6The program counter stores a count of all the programs stored in RAM.

1.7Computer operations are synchronised with the 50 Hz from the power station.

1.8Cell phone switching is accomplished by relay logic.

1.9The bus is the interface between the computer and an output peripheral like a printer.

1.1020

Q2— Section header —

2.1A Summing amplifier can be constructed using an operational amplifier. Answer the following questions:

2.1.1Draw a neat fully labelled 4 input Summing amplifier circuit which uses an operational amplifier. (6\

2.1.2Assuming that the input resistors of the summing amplifier equals the feedback resistor, calculate the output voltage for the following inputs: V1 = +10 mV V2 = 25 mV V3 = +300 mv

2.2Specialised signal functions such as differentiati on and integrati on can be performed by an operational amplifier. Answer the following questions:

2.2.1Draw a fully labelled operational amplifier circuit which will function as a differentiator.

2.2.220

Q3— Section header —

3.1You are required to find a fault in an ignition system. Within the circuitry is an inverting operational amplifier which is part of a circuit which is used to amplify the input signal of +1Volt. All external connections to the operational

3.2Most modern digital multi meters make use of the ual lope integrating technique when measuring input voltages. Make a neat block diagram drawing to illustrate the working of this type of

3.3The uccessive pproximation nalogue to igital converter is preferred

Q4— Section header —

4.1Computers store large amounts of data in hard disk drives. When multiple disk drives are connected to a computer eit her adial nterfacing or daisy

4.1.1Draw a small block diagram to illustrate how adial interfacing on 3 external disk drives is done.

4.1.2Draw a small block diagram to illustrate how aisy hain interfacing on 3 external disk drives is done. (2 4\

4.2PROGRAMMING INSTRUCTION PROCEDURE The following instruction set is available: OP CODE DESCRIPTION LOAD Load accumulator

4.3Briefly describe the RS 232 protocol when transmitting data between computers and also other peripheral devices. (4\ [20]20

Q5— Section header —

5.1

5.2Draw a fully labelled block diagram of an 8 bit or 16 bit Von Neumann architecture microprocessor . (NOT A COMPUTER BLOCK DIAGRAM\

Mark Allocation

Total100 marks

Sections20 + 20 + 20 + 20 + 20 = 100 marks

Paper information

TitleDocument

SubjectLogic Systems

LevelN6

Document typeQuestion paper

Year2018

MonthAugust

Pages6

Downloads3

Examination context

Decade2010s

Years ago8y

SeasonWinter (SH)

Start dayWednesday

Exam periodAugust 2018

Days since exam2,991

About Logic Systems examination preparation

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