head amplifier 前置放大器 ; 拾音头放大器 ; 前级视频放大器 ; 前置放年夜器
Mast Head Amplifier 塔顶放大器
HA Head Amplifier 前置放大器
video head amplifier 录放象头放大器
HTU Head Amplifier 前置放大器
Mic Amplifier for artificial head 人工头的麦克风放大器
At the same time this kind of material is also the best material for high fidelity magnetic head, high performance magnetic amplifier.
同时这种材料也是高灵敏度保真磁头、高性能磁放大器元件的最佳材料。
In addition, the potentiometer for amplitude regulation of force functor before power amplifier and the permanent magnet in vibrating head results in further curative effect.
另外，在功率放大器前设置了可以调节力功能器振幅的电位器，在振动头上设置了一个永久磁铁，以进一步提高对各种疾病的疗效。
In the television system, the head amplifier, whose low noise being put the first place in all the features, is one of the most important element circuits, which determines the image quality.
预放器是电视系统中决定图象质量最关键单元电路之一，而在预放器所有特点中，要求低噪声居首位。
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