ANTRIEBS-IMPULSGENERATOR FUER EINE ANALOG ANZEIGENDE ELEKTRONISCHE UHR

• Main Authors: HISAHARU OGAWA, YASOJI SUZUKI
• Format: Patent
• Language: German
• Subjects: BASIC ELECTRONIC CIRCUITRY; ELECTRICITY; ELECTROMECHANICAL CLOCKS OR WATCHES; ELECTRONIC TIME-PIECES; HOROLOGY; PHYSICS; PULSE TECHNIQUE

Disclosed is a circuit for generating in a pulse motor drive coil an initial pulse motor drive pulse in a unit length of time during which a second hand is driven by one step, after resetting for time correction has been released. The output of a divider chain for frequency-dividing a standard frequency signal from a quartz oscillator into a signal having a period equal to the unit length of time is delayed by a delay circuit, and by a logic gate responsive to the output of the delay circuit and the output of the divider chain there is produced an output pulse signal having a period equal to the unit length of time and a narrower width. The output of the logic gate is supplied to a binary counter. An output circuitry responsive to the output of the binary counter and the output of the logic gate generates drive pulses in the drive coil. The reset signal is applied to the delay circuit and at least a frequency divider stage producing the signal the period of which equals the unit length of time.