Here is the quote from Wikipedia. Parados is, again, quite mistaken.
, a representative democracy may or may not be a constitutional republic. For example, "the United States relies on representative democracy, but [its] system of government is much more complex than that. [It is] not a simple representative democracy, but a constitutional republic in which majority rule is tempered by minority rights protected by law.".
You got that Paradox?---It is not a simple representative democracy but a constitutional republic in which majority rule is tempered by minority rights protected by law.
A constitutional republic is a state where the head of state and other officials are elected as representatives of the people, and must govern according to existing constitutional law that limits the government's power over citizens.
In a constitutional republic, executive, legislative, and judicial powers are separated into distinct branches and the will of the majority of the population is tempered by protections for individual rights so that no individual or group has absolute power.
The fact that a constitution exists that limits the government's power makes the state constitutional. The head(s) of state and other officials are chosen by election, rather than inheriting their positions, and that their decisions are subject to judicial review.