A device and method for pushing an anchor through a bore in a bone is provided with an elongated shaft, an anchor carrying assembly disposed at a distal end of the shaft for carrying an anchor, and a plunger disposed in the elongated shaft. One partial current is generated by an asymmetric differential amplifier with two lateral bipolar transistors of different area. The reinforcing member is sleevingly coupled to the flexible member. In order to also be able to record charges of considerably different amounts, exceed data is generated when the charges are based on an individual request that exceeds the amount of the charge limit, and an increased charge limit is established based on this exceed data. When both the first condition and the second condition are satisfied, the reading condition determining unit sets one of the first reading conditions as a reading condition for reading image data.