What are the two broad classes of logic circuits based on polarity?

The two broad classes of logic circuits based on polarity are:

1. Positive logic circuits: In positive logic circuits, a logic high (usually represented by a high voltage level) represents a true or 1, while a logic low (usually represented by a low voltage level) represents a false or 0.

2. Negative logic circuits: In negative logic circuits, the opposite is true - a logic high represents a false or 0, while a logic low represents a true or 1.

- Positive logic circuits
- Negative logic circuits

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