CLOCK GENERATION DEVICE AND DRIVE DEVICE

To provide a clock generation device for generating a more stable clock in response to a start-up start of an oscillator and a drive device for supplying a clock to a timer.SOLUTION: A clock generation device 1 includes a voltage-controlled oscillator for outputting a clock Fout according to an input control voltage Vout, a control voltage generator for generating a control voltage according to a difference between a frequency of the clock and a target frequency, a start-up voltage generator for generating a start-up voltage Vstart to be supplied to the voltage-controlled oscillator during a start-up period of the voltage-controlled oscillator, and a start-up circuit for setting the control voltage to the start-up voltage during the start-up period from the start-up of the voltage-controlled oscillator.SELECTED DRAWING: Figure 1 【課題】発振器の起動開始に応じてより安定したクロックを発生するクロック発生装置及びタイマにクロックを供給する駆動装置を提供する。【解決手段】クロック発生装置１は、入力される制御電圧Ｖｏｕｔに応じたクロックＦｏｕｔを出力する電圧制御発振器と、クロックの周波数と目標周波数との差に応じた制御電圧を発生する制御電圧発生器と、電圧制御発振器の起動期間に電圧制御発振器に供給する起動電圧Ｖｓｔａｒｔを発生する起動電圧発生器と、電圧制御発振器の起動開始から起動期間の間、制御電圧を起動電圧に設定する起動回路と、を備える。【選択図】図１