Patent ID: 8508642
Filing Date: 2013-08-13
Classification: H03M,H04N

Abstract:
1. An image data processing circuit comprising: a plurality of analog to digital converters, each respectively converting an analog signal to a digital signal, each of the plurality of analog to digital converters including; a comparator unit comparing the analog signal with a reference voltage to output a determination signal; a storing unit storing a digital signal corresponding to the analog signal based on the determination signal; wherein each of the comparators includes an initializing switch to determine an operating point before AD conversion operation is initiated, and an intermittent operation includes at least one non-operating AD converter, a first group of the initializing switches corresponding to operating AD converters is in an ON-state; and a second group of the initializing switches corresponding to non-operating AD converters is periodically in an OFF-state, and further wherein the second group of initializing switches are selectively turned off during an image data thinning mode and charge injection generated by on/off operation of the initializing switches is not transmitted to the reference voltage.