VOLTAGE-CONTROLLED OSCILLATOR

PROBLEM TO BE SOLVED: To prevent linearity of frequency variable characteristics from deteriorating.SOLUTION: A voltage-controlled oscillator 1 includes a vibrator 5 vibrating at a predetermined frequency, an oscillation circuit 6 outputting an oscillation signal oscillating at an oscillation freque...

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Bibliographische Detailangaben
1. Verfasser:	MOTOMIYA KOSHIRO
Format:	Patent
Sprache:	eng ; jpn
Schlagworte:	BASIC ELECTRONIC CIRCUITRY ELECTRICITY GENERATION OF NOISE BY SUCH CIRCUITS GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING,BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN ANON-SWITCHING MANNER
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Zusammenfassung:	PROBLEM TO BE SOLVED: To prevent linearity of frequency variable characteristics from deteriorating.SOLUTION: A voltage-controlled oscillator 1 includes a vibrator 5 vibrating at a predetermined frequency, an oscillation circuit 6 outputting an oscillation signal oscillating at an oscillation frequency depending on the frequency of the vibrator 5, a variable capacitance element 34 for changing the oscillation frequency based on a voltage applied, and an additional circuit 4 for adjusting a voltage applied to the variable capacitance element 34. A voltage based on a control voltage Vcont inputted externally, and a voltage supplied from the additional circuit 4 are applied to the variable capacitance element 34.SELECTED DRAWING: Figure 1 【課題】周波数可変特性の直線性が劣化することを防止する。【解決手段】電圧制御型発振器１は、所定の周波数で振動する振動子５と、振動子５の周波数に応じた発振周波数で発振する発振信号を出力する発振回路６と、印加される電圧に基づいて発振周波数を変化させる可変容量素子３４と、可変容量素子３４に印加される電圧を調整する追加回路４と、を備え、可変容量素子３４には、外部から入力される制御電圧Ｖｃｏｎｔ及び追加回路４から供給される電圧、に基づく電圧が印加される。【選択図】図１