GATE VOLTAGE REGULATION DEVICE AND GATE VOLTAGE REGULATION METHOD

To provide a gate voltage regulation device and a gate voltage regulation method that can realize miniaturization and cost reduction even when gate voltages of a plurality of amplification elements are adjusted.SOLUTION: A gate voltage regulation device includes a plurality of amplification elements...

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Bibliographic Details
Main Authors MIWA SHINICHI, HARAUCHI KENJI, KAGANO MIKI
Format Patent
LanguageEnglish
Japanese
Published 08.03.2022
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Summary:To provide a gate voltage regulation device and a gate voltage regulation method that can realize miniaturization and cost reduction even when gate voltages of a plurality of amplification elements are adjusted.SOLUTION: A gate voltage regulation device includes a plurality of amplification elements, a control unit that controls a gate voltage applied to each of the plurality of amplification elements, a plurality of current detection elements that are provided between a power supply that applies drain voltages to the plurality of amplification elements and the drain electrodes of the plurality of amplification elements, respectively, and output a voltage signal on the basis of the drain current of the corresponding amplification elements, an operational amplifier that amplifies the voltage signal output from the connected current detection element and inputs it to the control unit, and a switching unit that switches the current detection element connected to the operational amplifier. The control unit determines the gate voltage to be applied to the amplification element on the basis of the input voltage signal.SELECTED DRAWING: Figure 1 【課題】複数の増幅素子のゲート電圧を調整する場合であっても、小型化、及び低コスト化を実現することができるゲート電圧調整装置及びゲート電圧調整方法を得る。【解決手段】複数の増幅素子と、複数の増幅素子のそれぞれに印加するゲート電圧を制御する制御部と、複数の増幅素子のそれぞれにドレイン電圧を印加する電源と複数の増幅素子のドレイン電極との間にそれぞれ対応して設けられ、対応する増幅素子のドレイン電流に基づいて電圧信号を出力する複数の電流検波素子と、接続された電流検波素子から出力された電圧信号を増幅し、制御部に入力するオペアンプと、オペアンプと接続される電流検波素子を切り替える切り替え部とを備える。制御部は、入力された電圧信号に基づいて増幅素子に印加するゲート電圧を決定する。【選択図】図1
Bibliography:Application Number: JP20210082221