Patent ID: 7940332

Claim:
A device, comprising an input node configured to receive a composite video signal that provides active video information during a first interval and synchronization information during a second interval; a first capacitor comprising a first electrode coupled to the input node and a second electrode; a first transistor comprising a first current electrode coupled to a first voltage reference, a second current electrode coupled to the second electrode of the first capacitor, and a control electrode; a second capacitor comprising a first electrode coupled to the control electrode of the first transistor and a second electrode, the second capacitor having a capacitive value; a first resistive element comprising a first electrode coupled to the first voltage reference and a second electrode coupled to the control electrode of the first transistor, the first resistive element having a first resistive value; and a second resistive element comprising a first electrode coupled to the control electrode of the first transistor and a second electrode coupled to a second voltage reference, the second resistive element having a second resistive value, the capacitive value, first resistive value, and second resistive value such that the first transistor is placed in cutoff mode during the first interval and in a saturation mode during the second interval.