Gain control circuit and gradation correcting apparatus.

摘要

A small scale gain control circuit for controlling gain correction quantity is realized, using the configuration of an inverter (1), a subtraction circuit (2), a limiter (3), and a multiplication circuit (4). Gain correction quantity is controlled in such a way that in the gradation correcting apparatus a first constant fixes a value beyond which gain correction quantity is zero and a second constant fixes an inclination of the characteristics line. <IMAGE>