A device for automatically controlling a sled loop gain in an optical disc drive having a sled motor. The device includes a pickup for irradiating a laser beam onto an optical disc and receiving a reflected beam to read a signal recorded on the optical disc; a tracking error detector to detect an error...http://www.google.se/patents/US6222802?utm_source=gb-gplus-sharePatent US6222802 - Device and method for automatically controlling sled loop gain in optical disc drive