Device for monitoring a clock signal

US5028813A · kind A · utility

Assignee

• Heidelberger Druckmaschinen AG · DE

Inventors

• Dieter Hauck · Eberbach, DE
• Karl May · Bad Vilbel, DE
• Hans E. Muller · Saratoga, US
• Jurgen Rehberger · Dossenheim, DE

Key dates

• Filing date: May 8, 1989
• Grant date: Jul 2, 1991
• Expiry date: May 8, 2009

Classification

• Technology area (CPC G): Physics
• CPC primary: G01R23/15
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

Method of monitoring a clock signal includes bringing a bistable element to a first state through pulses of the clock signal and, upon the occurrence of pulses of a reference signal having a frequency lower than the frequency of the clock signal, scanning the state of the bistable element and outputting it as an output signal, and subsequently setting the bistable element to a second state.