Patent ID: 9612579
Date: 2017-04-04
CPC Classifications: G04C,H02P

Claim:
1. An electronic clock, comprising: a bipolar stepping motor; a motor driver including two driving terminals for driving the stepping motor; a driving pulse generating circuit for generating a chopper driving pulse that is one group of several choppers for driving the stepping motor; a selector for outputting the generated chopper driving pulse, which has been generated by the driving pulse generating circuit, to the motor driver; and an adjustment pulse generating circuit for generating an adjustment pulse, which is output in an OFF period between outputs of the choppers of the chopper driving pulse during an ON period of the one group of the chopper driving pulse, to the selector, wherein the selector outputs the original signal of the adjustment pulse to the motor driver so that the adjustment pulse is output from a driving terminal that is different from a driving terminal from which the chopper driving pulse is output, wherein the adjustment pulse generating circuit generates a plurality of different kinds of the adjustment pulses, and wherein the electronic clock further comprises a specifying circuit for selecting one of the plurality of different kinds of the adjustment pulses and instructing the adjustment pulse generating circuit to output the selected one of the plurality of different kinds of the adjustment pulses, wherein the chopper driving pulse has a plurality of OFF periods, and wherein the adjustment pulse includes a plurality of small pulses corresponding to the plurality of OFF periods, and the plurality of different kinds of adjustment pulses have different numbers and output positions of the plurality of small pulses.