MOTOR DRIVER CIRCUIT FOR LINEAR MOTOR, POSITIONING DEVICE USING THE SAME, AND HARD DISK DIVICE

• Main Author: SUGIE TAKASHI
• Format: Patent
• Language: English; Japanese
• Published: 23.05.2023
• Subjects: CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORSOR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION; PHYSICS; REGULATING; SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES

To provide a driver circuit capable of detecting the current in the output stage of a push-pull.SOLUTION: A first transistor M11 receives the gate voltage of a high-side transistor MHB on its gate, whose source is connected to the source of the high-side transistor MHB. A first operational amplifier OA11 has a first input connected to the drain of the high-side transistor MHB, a second input connected to the drain of the first transistor M11, and an output connected to the gate of a second transistor M12. A third transistor M13 receives the gate voltage of a low-side transistor MLB on its gate, whose source is connected to the source of the low-side transistor MLB. The current subtraction circuit 282 outputs the difference between the current flowing through the second transistor M12 and the current flowing through a fourth transistor M14.SELECTED DRAWING: Figure 2 【課題】プッシュプルの出力段の電流を検出可能なドライバ回路を提供する。【解決手段】第１トランジスタＭ１１は、ゲートにハイサイドトランジスタＭＨＢのゲート電圧を受け、ソースがハイサイドトランジスタＭＨＢのソースと接続される。第１オペアンプＯＡ１１は、第１入力がハイサイドトランジスタＭＨＢのドレインと接続され、第２入力が第１トランジスタＭ１１のドレインと接続され、出力が第２トランジスタＭ１２のゲートと接続される。第３トランジスタＭ１３は、ゲートにローサイドトランジスタＭＬＢのゲート電圧を受け、ソースがローサイドトランジスタＭＬＢのソースと接続される。電流減算回路２８２は、第２トランジスタＭ１２に流れる電流と第４トランジスタＭ１４に流れる電流の差分を出力する。【選択図】図２