Logic Gates and Circuit Characteristics Crossword

The demonstrations treat a gate as a piece of logic: inputs in, output out, and an answer that follows from a truth table. That is the right way to think about a gate while you are designing with it, and it is not the whole story once you have to build the thing.

A real gate is made of transistors, sources and sinks a finite amount of current, can only drive so many inputs before it stops working, takes time to change its mind, and behaves differently depending on whether it was made in TTL or CMOS. This crossword covers both halves: the gates you already know, and the electrical vocabulary that goes with putting them on a board.

That second half is worth taking seriously. Most first circuits that do not work are not wrong in their logic. They are wrong because an input was left floating, or an output was asked to drive more than it could, and both of those have names in this puzzle.

How it works

Click a cell and type. Clicking the same cell again switches between across and down, and the clue you are currently in is highlighted.

Check grid marks incorrect letters in red without revealing the correct ones, so a check is a prompt to reconsider a clue rather than a way of being told the answer. Clear grid empties the puzzle. Clues can be ticked off in the list as you finish them.

Where an answer has more than one word, run the words together and leave the spaces out.

Logic Gates and Circuit Characteristics Crossword

Logic Gates and Circuit Characteristics Crossword (21 terms). Where answers have multiple words, omit spaces (e.g. DEREKMOLLOY).

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💡 Note:Where an answer comprises multiple words, omit the space (e.g., “The best lecturer in the world!” would be entered as DEREKMOLLOY).

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Check gridClear grid0/91 cells

Across

2.A gate that behaves the same as an AND gate with a NOT gate connected to the output terminal.(4)

5.A gate designed to output a high logic level whenever both inputs are at the same logic levels.(4)

6.The condition when a gate circuit outputs current from ground to a load.(7)

7.An acronym standing for Transistor-to-Transistor Logic, describing gate circuits constructed of resistors, diodes, and bipolar transistors.(3)

9.A multiple-input gate whose output will be high if and only if all inputs are high.(3)

11.A general classification for gate circuits that use complementary P- and N-channel MOSFETs.(4)

12.A special logic gate manufactured to perform the same function as two inverters.(6)

16.A resistor used to provide a low logic level in the event of a floating signal source.(8)

18.A gate whose output will be high if any of the inputs are high.(2)

19.A gate that outputs a high logic level if the inputs are at different logic levels.(3)

20.A special type of gate output that provides current sinking, current sourcing, and high-impedance modes.(8)

Down

1.A special property of NAND and NOR gates where they are able to mimic the operation of any other gate type.(9)

3.The measure of how many gate inputs a single gate output can drive.(6)

4.A type of level used as a general term for the representation of a binary bit by a circuit voltage.(5)

8.A type of table that is a way of representing the input/output relationships of a gate circuit by listing all the possible input logic level combinations.(5)

10.A gate that functions as an OR gate with its output inverted.(3)

13.A separate input terminal used to command tristate gates into their high-impedance output modes.(6)

14.The condition when a gate circuit draws in current to the positive side of the DC power supply.(8)

15.A gate that outputs the exact opposite digital signal as what is input.(8)

16.A resistor used to provide a high logic level in the event of a floating signal source.(6)

17.A margin between the tolerable output and input ranges for acceptable signal voltage levels.(5)

Where to look things up

The gates themselves are in Logic Gates and What They Are For and One Gate to Rule Them All. The electrical characteristics are covered in the logic gates chapter of the reading, which goes considerably further into the electronics than the demonstrations do.