Patent ID: 7387433
Filing Date: 2008-06-17
Classification: G04G

Abstract:
1. An integrated circuit for analog electronic watch applications, comprising an oscillator circuit for generating clock signals, a stepper motor driver circuit for generating motor driving signals, a plurality of trimming capacitors for fine-tuning the output frequency of the oscillator circuit and a corresponding plurality of electronic switches for selectively connecting/disconnecting said trimming capacitors to said oscillator circuit and switching circuitry for switching-in and/or -out the electronic switch, wherein said stepper motor driver circuit is connected to said oscillator circuit and comprises means for converting said clock signals into said motor driving signals, said switching circuitry comprises means to control the switching-in and/or switching-out of said electronic switches whereby oscillator frequency is fine-tuned, and said plurality of electronic switches are selectively controllable and operable by switching control signals applied at a frequency trimming port.