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Electronics > ET1 > Flashcards

ET1 Flashcards

1
Q

What is the input impedance for a non-inverting operational amplifier?

A

The value in the table.

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2
Q

What is the input impedance for an inverting operational amplifier?

A

The resistor into the inverting input.

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3
Q

Which symbol on an operational amplifier represents the inverting input?

A

Symbol: -

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4
Q

Which symbol on an operational amplifier represents the non-inverting input?

A

Symbol: +

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5
Q

To set up a non-inverting amplifier what does the inverting input have to connected to?

A

To ground. [0V]

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6
Q

To set up an inverting amplifier what does the inverting input have to connected to?

A

Vin

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7
Q

What is an application of transition gates?

A

Provide edge triggering.

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8
Q

To set up an inverting amplifier what does the non-inverting input have to connected to?

A

To ground. [0V]

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9
Q

What does TTL stand for?

A

Transistor-Transistor Logic

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10
Q

What does CMOS stand for?

A

Complementary Metal Oxide Semiconductors

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11
Q

In CMOS what range of Vcc can be used?

A

3V to 18V

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12
Q

In TTL what range of Vcc can be used?

A

5V +/- 0.25V

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13
Q

What is the upper threshold for a logic level 0 in TTL?

A

0.8V

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14
Q

What is the lower threshold for a logic level 1 in TTL?

A

2V

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15
Q

What is the upper threshold for a logic level 0 in CMOS?

A

0.3Vcc

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16
Q

What is the lower threshold for a logic level 1 in CMOS?

A

0.7Vcc

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17
Q

What is the simplified version of the Boolean expression A.(A+B)?

A

A.(A+B) = A.A + A.B = A + A.B = A.(1+B) = A

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18
Q

What is the simplified version of the Boolean expression (A+B).(A+C)?

A

(A+B).(A+C) = A.A + A.C + A.B + B.C = A + A.C + A.B + B.C

= A + A.(B+C) + B.C = A.(1 + (B+C)) + B.C = A + B.C

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19
Q

According to De Morgan’s theorem what is NOT A OR NOT B equivalent to?

A

A NAND B

20
Q

What is A AND NOT A equivalent to?

A

0

21
Q

What is A.1 equivalent to?

A

A

22
Q

What is A.0 equivalent to?

A

0

23
Q

What is A OR NOT A equivalent to?

A

1

24
Q

What is A + 1 equivalent to?

A

1

25
Q

What is A + 0 equivalent to?

A

A

26
Q

What is A + A.B equivalent to?

A

A + A.B = A.(B+1) = A

27
Q

What is an alternative method to Boolean algebra for simplifying a Boolean expression?

A

Karnaugh Maps

28
Q

What is the rate of transmission of a multiplexer also known as?

A

The baud rate.

29
Q

In what form does a multiplexer receive data?

A

Parallel from.

30
Q

In what form does a multiplexer transmit data?

A

Serial form.

31
Q

For a multiplexer with 2^n data inputs how many input select lines are there?

A

n select lines.

32
Q

Explain how a multiplexer can be reconfigured to perform a different logic function.

A

By altering the connections between the D inputs and the power rails.

33
Q

Why is a resistor needed with a switch?

A

To prevent short-circuit of power rails.

34
Q

What is 45 in binary?

A

101101

35
Q

What is 45 in binary coded decimal (BCD)?

A

0100 0101

36
Q

To make a BCD counter from a 4-bit binary counter what number in binary must it reset on?

A

1010 [10 in decimal]

37
Q

For a rising-edge triggered D-Type Flip Flop what happens when NOT Q when NOT R is taken to logic level 0?

A

NOT Q is at logic level 1.

38
Q

How many pulses does the 2 Hz clock produce in 60 seconds?

A

120

39
Q

To draw a voltage transfer characteristic for an operational amplifier what needs to be on each of the axis?

A

x-axis: Vin (V)

y-axis: Vout (V)

40
Q

When drawing a frequency response for an operational amplifier, what goes on each axis?

A

x-axis: Frequency (Hz)

y-axis: Voltage gain

41
Q

When drawing a frequency response for an operational amplifier, the gain holds for a while and then slopes down. What point must this slope pass through?

A

x-coordinate: Bandwidth

y-coordinate: 0.7*gain

42
Q

How can an input be held at logic level 1 until a switch is closed?

A

Use a pull-up resistor.

43
Q

What does the circle ( o ) on the reset connection indicate?

A

Reset why R is at logic level 0. [active low]

44
Q

When producing either an up or down counter using d-type flip flops what must NOT Q output go to?

A

The D input of the same flip flop.

45
Q

For a down counter made out of d-type flip flops what does the input to the clock of the next IC have to be from?

A

The Q output of the flip flop.

46
Q

For a down counter made out of d-type flip flops what does the LED output have be connected to?

A

The Q output of the flip flop.

Electronics (1 decks)

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