| 摘要 |
<p>An automatic color temperature adjusting system for a television receiver which is capable of eliminating an unstable picture condition during the turn on transition period. The automatic color temperature adjusting system has a gain control circuit (l0R-20R, l0G-20G, l0B-20B, 40) associated with a feedback loop for controlling the amplifier characteristics of an amplifier (7R, 7G, 7B) in each color channel. The gain control circuit (l0R-20R, l0G-20G, l0B-20B, 40) is responsive to the turning on of the power supply to lower the gain of each amplifier (7R, 7G, 7B) to a given level. The gain control circuit (l0R-20R, l0G-20G, l0B-20B, 40) adjusts the gain of the amplifier (7R, 7G, 7B) to gradually increase the gain to reach a normal gain level after a given period of time.</p> |
