RN6752 is a feature rich, high quality 1-channel HD video decoder chip, in which the integrated 10-bit ADC with a maximum sampling rate of 72MHz is used to digitize the video signal at 4x over-sampling rate. The associated Clamping and automatic gain control (AGC) circuit hold the AC coupled signal to a DC level as well as set the signal gain for maximum signal dynamic range before digitization. The analog front-end (AFE) with automatic gain control (AGC) can accept an input signal ranging from 250mV to 1.3V and allows signals from the source directly applied to the decoder input without going through extra gain/attenuation stage. The accurate color carrier phase acquisition is achieved by the low jitter phase lock loop (PLL).
With an improved and robust sync processing circuit, horizontal and vertical SYNC pulses can be correctly extracted from a CVBS, AHD1.0, 1080N, or luminance (Y) signal. Workin