Patent ID: 7525469

Claim:
A pseudo-differential analog front end (AFE) circuit for receiving at least one analog image signal and generating at least one digital signal, wherein the pseudo-differential AFE circuit comprises at least one converting circuit and each converting circuit comprises: a first clamper for receiving the analog image signal and restoring a DC voltage level of the analog image signal to generate a first restored signal; a first input buffer for buffering the first restored signal and generating a buffered signal; and an analog-to-digital converter (ADC) having a positive input terminal and a negative input terminal, one of which receives the buffered signal and the other of which receives a comparing voltage, wherein the analog-to-digital converter converts a voltage difference between the two input terminals into the digital signal; wherein each of the analog-to-digital converters receives a common comparing voltage while the number of the at least one converting circuit is greater than one.