ELECTRONIC CIRCUIT FOR SUPPLYING ENERGIZING PULSES OF PREDETERMINED DURATION TO AN ELECTRIC MOTOR

摘要

1480783 Electronic timepieces SOC SUISSE POUR L'INDUSTRIE HORLOGERE MANAGEMENT SERVICES SA 9 Sept 1974 [4 Oct 1973] 39193/74 Heading G3T [Also in Divisions G4 and H3] A circuit for providing 1Hz pulses E of sufficient length to operate a stepping motor of a time-keeping or measuring instrument by division down from a high frequency comprises a main frequency division chain 7, 6....2 which sets bi-stable circuit 1 every second and an auxiliary division chain which determines the pulse duration, resetting the circuit I a predetermined time after it has been set (13ms as shown). Circuits 8, 9 and 10 are reset by the inverted output of divider 2. The circuit may be realised by bi-polar or CMOS technology.