Automatic gain control circuit for stabilizing the level of a reproduced color signal

Electrical apparatus for processing an input signal and providing an output signal having a stabilized level, said electrical apparatus comprising:

• first feedback means for receiving and amplifying said input signal and for providing a first signal having a first level, said first feedback means detecting a first component of said first signal representing said first level, and controlling amplification of said input signal and stabilizing said first level in accordance with the detection of said first component;
• noise reduction means for receiving said first signal and reducing noise included in said first signal, and for providing a second signal;
• and
• second feedback means for receiving and amplifying said second signal and for providing said output signal having a second level, said second feedback means detecting a second component of said output signal representing said second level, and controlling amplification of said second signal and stabilizing said second level in accordance with the detection of said second component, wherein said second level will approximately equal said first level.

Method for processing an input signal and providing an output signal having a stabilized level, said method comprising the steps of:

• receiving and amplifying said input signal, and providing a first signal having a first level;
• detecting a first component of said first signal representing said first level, and providing a first control signal;
• controlling amplification of said input signal in accordance with said first control signal for stabilizing said first level;
• reducing noise contained within said first signal, and providing a second signal;
• amplifying said second signal, and providing said output signal having a second level;
• detecting a second component of said output signal representing said second level, and providing a second control signal;
• and
• controlling amplification of said second signal in accordance with said second control signal for approximately equalizing said second level with said first level.