请教一下松下卡座上的标识是什么意思？

qdstereo

请教一下松下这款卡座上标注的VIRTUAL BATTERY OPERATION是什么意思？直译过来是“虚拟电池操作” ？不明白

gujiecmzx

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这卡座设计有点意思

suline

Virtual Battery Control with battery operation.

It is equipped with a virtual battery operation that demonstrates the same operating capability as a battery-driven power supply.
In this circuit, a reference potential generation circuit incorporating an FET into an electric circuit is used for capacitor charging, and the circuit is shut off during music playback to prevent power supply noise from entering, thereby reducing power supply noise.



The virtual battery operation is a pre-main amplifier equipped with high sound quality technology such as MOS class AA.


By adopting a power MOS-FET, we have realized MOS class AA unique to Technics.
In the MOS Class AA circuit, a MOS-FET is used for the class A operation voltage control amplifier of the class AA output stage, and a bipolar transistor is used for the current amplifier to provide excellent linearity in an ideal operation state of 0 current output.


Virtual battery operation is used to reduce noise in the power supply.
In this circuit, a reference potential generation circuit is used for capacitor charging, and voltage is supplied from the capacitor to the gate of the FET element during music playback. This effectively cuts off the reference potential generation circuit and prevents noise contamination of the audio signal.

gujiecmzx

suline 发表于 2022-8-12 20:59
Virtual Battery Control with battery operation.

It is equipped with a virtual battery operation t ...

牛逼，这都能找到英文原文。大家也没必要看懂。
其实就是虚拟电池模式，降低噪声，就像用电池供电一样。
松下也是蛮奇葩的，这种小型组合机，谈不上发烧，还搞这种功能。

suline

gujiecmzx 发表于 2022-8-12 21:13
牛逼，这都能找到英文原文。大家也没必要看懂。
其实就是虚拟电池模式，降低噪声，就像用电池供电一样。 ...

class AA不搞了，又折腾这个，这是从松下功放里找出来的介绍

gujiecmzx

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suline 发表于 2022-8-12 21:14
class AA不搞了，又折腾这个，这是从松下功放里找出来的介绍

估计也是噱头，搞音响的做好电源是基本功啊

qdstereo

suline 发表于 2022-8-12 20:59
Virtual Battery Control with battery operation.

It is equipped with a virtual battery operation t ...

谢谢！

tk416

电池操作的虚拟电池控制。它配备了虚拟电池操作，表现出与电池驱动电源相同的操作能力。在该电路中，将FET结合到电路中的参考电势产生电路用于电容器充电，并且该电路在音乐回放期间被切断以防止电源噪声进入，从而降低电源噪声。虚拟电池操作是一个前置主放大器，配备了高音质技术，如MOS AA类。通过采用功率MOS-FET，我们实现了工艺特有的MOS AA类。在MOS AA类电路中，MOS-FET用于AA类输出级的A类工作电压控制放大器，双极晶体管用于电流放大器，以在0电流输出的理想工作状态下提供良好的线性。虚拟电池操作用于降低电源中的噪声。在该电路中，参考电势产生电路用于电容器充电，并且在音乐回放期间，电压从电容器提供给FET元件的栅极。这有效地切断了参考电位产生电路，并防止了音频信号的噪声污染。

低温_

这是90年代日本比较流行的Mini HiFi系统中的卡座，Technics这套系统1994年生产，算是用心之作，包括:
CD机 :SL-P70
功放:  SU-A70
卡座:  RS-BX70
调谐器: ST-GT70
音箱:  SB-M300