G factor alignment

US5764605A · kind A · utility

Assignee

• Deutsche Thomson-Brandt GmbH · DE

Inventors

• Friedhelm Zucker · Mönchweiler, DE
• Christian Buchler · Villingen-Schwenningen, DE

Key dates

• Filing date: Jun 17, 1996
• Grant date: Jun 9, 1998
• Expiry date: Jun 17, 2016

Classification

• Technology area (CPC G): Physics
• CPC primary: G11B7/0945
• WIPO field: Audio-visual technology
• WIPO sector: Electrical engineering

Abstract

A system for guidance of an optical scanning device is disclosed in which a gain factor (G factor) is responsive to a track error signal which is a function of the deflection of a scanning device. Deviation of the G factor setting from an optimum setting is automatically determined in conjunction with an open track control loop by driving a servo device (SV) to deflect an actuator from its neutral position and by evaluating a push-pull signal (PPTE). The G-factor is automatically set to an optimum value.