Automatic chrominance gain control system

DETAILED DESCRIPTION What is claimed is: 1.
In a color television receiver, an automatic gain controlled chrominance signal amplifier system for processing composite chrominance signals having burst and image-representative components comprising: a first amplifier having at least one input terminal adapted for coupling to a source of composite chrominance signals for providing amplified image-representative components at a first output terminal; a second amplifier having at least one signal input terminal coupled to said first output terminal of said first amplifier, having at least one control terminal adapted to receive a first gain control signal and having at least a first output terminal at which gain controlled image-representative chrominance signal components are provided; a third amplifier having at least one signal input terminal coupled to said first output terminal of said first amplifier, having at least one control terminal adapted to receive a first gain control signal and having at least a first output terminal at which gain controlled image-representative chrominance signal components are provided; detector means having an input terminal coupled to said first output terminal of said second amplifier and responsive to peak excursions of said gain controlled image-representative chrominance signal components for coupling said first gain control signal to said one control terminal of each of said second and third amplifiers; and further signal gain controlling means associated with said third amplifier for adjusting the amplitude of chrominance signal components at said first output terminal thereof without affecting the gains of said first and second amplifiers.
2.
An amplifier system according to claim 1, wherein: said further gain controlling means comprises a viewer-operative color saturation control for varying the gain of said third amplifier only.
3.
An amplifier system according to claim 1, wherein: said second and third amplifiers are of similar circuit configuration, said signal input terminals of said second and third amplifiers are coupled in common to said first amplifier, said control terminals are coupled in common to said detector means and said second and third amplifiers are similarly responsive to said first gain control signal for proportionally varying the amplitude of chrominance signals produced at their respective output terminals