A pen recorder for recording a magnitude of a measured signal with a pen which is moved in accordance with a digital servo controller. High performance and function are attained by using ASIC with simple interactive operation. A novel pen mechanism is used for recording. High quality is achieved at low...http://www.google.es/patents/US4930090?utm_source=gb-gplus-sharePatente US4930090 - Pen recorder moved according to a digital servo controller
Pen recorder moved according to a digital servo controller
