Driving pulse width controlling circuit for a transducer of an electronic timepiece

Claim 1

In an analogue electronic timepiece, the combination of a transducer comprising a rotor, a stator and a driving coil, means including a power source for periodically supplying to said driving coil electric pulses of a selected width to drive the rotor and means for automatically controlling the pulse width according to the load of the transducer and thereby reduce power comsumption, said pulse supplying means comprising two transducer driving inverters of which the outputs are connected respectively to opposite terminals of said driving coil, means supplying a clock signal, a first flip-flop having Q, Q and CL terminals, a second flip-flop having Q, CL and R terminals, a first NAND circuit having output terminal connected with one of said transducer driving inverters and three inputs connected respectively with said clock signal supply means, the Q terminal of said second flip-flop and the Q terminal of said first flip-flop, and a second NAND circuit having an output connected to the other transducer driving inverter and three inputs connected respectively with said clock signal supply means, said Q terminal of said second flip-flop and the Q terminal of said first flip-flop.