Patent ID: 8179467

Claim:
An analog signal processing circuit comprising: a first signal line; a second signal line; and a first signal conversion circuit connected to the first and second signal lines, wherein the first signal conversion circuit comprises a first capacitor having a first electrode which is connected to the first signal line, and a second electrode which is connected to a first node; a second capacitor having a third electrode which is connected to the second signal line, and a fourth electrode which is connected to a second node; a first inverting amplifier having a first input electrode which is connected to the first node, a first output electrode which is connected to a third node, and which includes a first negative feedback switch; a second inverting amplifier having a second input electrode which is connected to the second node, a second output electrode which is connected to a fourth node, and which includes a second negative feedback switch; a first averaging switch configured to connect between the first node and second node; and a second averaging switch configured to connect between the third node and fourth node.