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BTEC Engineering - Unit 35


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Status    Glossary    Download BTEC Engineering Unit 35

Assessment and grading criteria

To achieve a pass grade the evidence must show that the earner is able to:

To achieve a merit grade the evidence must show that, in addition to the pass criteria, the learner is able to:

To achieve a distinction grade the evidence must show that, in addition to the pass and merit criteria, the learner is able to:

P1 Diodes - explain the purpose of two different types of diode, each in a different electronic circuit application

P2 Transistors - explain the operation of two different types of transistor, one in an analogue and one in a digital circuit

P3 Logic Gates - explain the operation of three different logic gates with appropriate gate symbols, truth tables and Boolean expressions

P4 Op Amps - build and test two different types of analogue circuit using operational amplifiers

P5 Combinational Logic - build and test a combinational logic circuit that has three input variables

P6 Sequential Logic - build and test a sequential circuit using integrated circuit(s)

P7 Falstad Simulator - use a computer software package to simulate the construction and testing of an analogue circuit with three different types of components

P8 Falstad Simulator - use a computer software package to simulate the construction and testing of a digital logic circuit with three gates.

M1 Op Amps - modify an existing analogue circuit to achieve a given revised specification by selecting and changing the value of one of the components

M2 Logic Gates - modify a digital circuit to achieve a given revised specification by selecting and changing up to two logic gates

M3 Algebra - Karnaugh Maps - evaluate and minimise a three input combinational logic circuit containing three gates.

D1 Falstad Simulator - using a simulation package, analyse the effects of changing the values of circuit parameters on the performance of an analogue circuit containing an operational amplifier or transistors

D2 40xx and 74xx Gates - compare and contrast two different types of logic family with reference to five characteristics.

  1. diodes
        LED
        Zener
        Rectifier
    transistors
        PNP and NPN
        analogue single-stage amplifier
        transistor as a switch
        voltage and current gain
        phase inversion
    FET
        N and P Channel
        analogue single-stage amplifier
        transistor as a switch
        voltage and current gain
        phase inversion
    logic gates
        AND, OR, NOT, NAND, NOR, XOR
        gate symbols, BSI, IEC, ANSI
        truth tables
        Boolean expressions
     
  2. operational amplifiers
        build and test
        comparator
        inverting amplifier
        non-inverting amplifier
        oscillator
            sine wave
            square wave
        filter
    circuit measurements
        resonant frequency
        cut-off frequency
        switching point
        gain at mid-frequency
        bandwidth
     
  3. combinational logic
         at least three gates and three input variables
    sequential logic
        R-S Latch / bistable
        JK Flip Flop
    OR
        D-Type Flip Flop
            3-stage counter
            3-stage shift-register
    logic families
        TTL
             supply voltage, input and output operating voltages, input and output impedance, propagation delay, power
        CMOS
             supply voltage, input and output operating voltages, input and output impedance, propagation delay, power
    circuit testing
        records of performance against given design requirement; input and output states; use of truth tables
        logic probe, signature analyser
        Minimisation of logic circuits
            De-Morgan’s theorem
            Karnaugh maps
     
  4. simulation software ( FALSTAD )
        BLANK
        DEFAULT
        EXAMPLE
        analogue circuits
            transistor, op-amp, active filter, rectifier, resistor, capacitor, diode
            measurement, scope, voltage, current
            record performance against given design requirement eg screen print, input/output waveforms (with scales)
            gain-frequency response
        digital circuits
            three input combinational circuit
            3-stage counter
            shift register
            R-S bi-stable
            JK bi-stable
            3-stage shift-register based on
                JK OR D-type Flip Flops
        instrument simulation
            on/off indicator
            logic probe
            word generator
            logic analyser
            record performance against given design requirement eg screen print, digital input/output waveforms (with scales)

 

 

 

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