What is the meaning of negative logic?

Negative Logic is a logical circuitry in which higher voltage level refers to LOW (‘0’ or FALSE) and Lower voltage level refers to HIGH(‘1’ or TRUE)

What is the use of positive and negative logic?

Positive logic is defined as a high voltage level representing a logic 1 and a low voltage level representing a logic 0. Negative logic is the reverse, i.e., a low voltage level represents a logic 1 and a high voltage level represents a logic 0.

Is logic positive or negative?

“When a circuit requires logic 1 to operate, engineers may refer to this condition as positive logic. Thus, the more positive voltage causes the action to take place. On the other hand, if a circuit requires a logic 0 to cause action, this type circuit is referred to as negative logic.

Which logic family works on negative logic?

But the disadvantage of ECL logic families is that it uses a negative power supply such that the logic levels are not compatible with any other logic family and makes analysis and measurement inconvenient.

What logic function is achieved by operation an AND gate using negative logic?

A Negative-AND gate behaves like a NOR gate. A Negative-OR gate behaves like a NAND gate. Rule for an Exclusive-OR gate: output is “high” if the input logic levels are different. Rule for an Exclusive-NOR gate: output is “high” if the input logic levels are the same.

What is meant by negative logic gates?

Negative logic: If the signal that activates the logic gate has for its high (1) level a voltage more negative than for its low (0) level then the polarity of the logic is called negative logic, as shown in Fig.

What is meant by negative thoughts?

Definition. Negative thoughts are cognitions about the self, others, or the world in general that are characterized by negative perceptions, expectations, and attributions and are associated with unpleasant emotions and adverse behavioral, physiological, and health outcomes.

What is a negative logic gate?

Negative logic: If the signal that activates the logic gate has for its high (1) level a voltage more negative than for its low (0) level then the polarity of the logic is called negative logic, as shown in Fig. 10.21(b).

Why do we have logic families?

A logic family is a collection of different integrated circuit chips that have similar input, output, and internal circuit characteristics, but they perform different logic gate functions such as AND, OR, NOT, etc.