EP 0203338 B1 19891108 - DRIVING CIRCUIT FOR A STEP MOTOR
Title (en)
DRIVING CIRCUIT FOR A STEP MOTOR
Publication
Application
Priority
DE 3519008 A 19850525
Abstract (en)
[origin: US4719368A] In a power supply control arrangement for the stepping motor of a watch an integrated circuit structure is disposed between the stepping motor and its energy source for controlling the supply of drive pulses to the motor. The circuit structure includes means for detecting the motor's non-response and means for supplying a correction pulse upon detection of non-response of the motor. There are further means for applying drive pulses of increased duration following such correction pulse for overcoming excessive loads and also means for shutting off the correction pulse or the energy source if the motor does not respond to the drive pulses of increased duration.
IPC 1-7
IPC 8 full level
CPC (source: EP US)
G04C 3/143 (2013.01 - EP US)
Designated contracting state (EPC)
CH FR GB IT LI
DOCDB simple family (publication)
DE 3519008 C1 19861009; EP 0203338 A2 19861203; EP 0203338 A3 19870701; EP 0203338 B1 19891108; JP S61275688 A 19861205; US 4719368 A 19880112
DOCDB simple family (application)
DE 3519008 A 19850525; EP 86105175 A 19860415; JP 11940486 A 19860526; US 86184886 A 19860512