UPIC FAQ Questions about products
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A08-3 How to use Flip-Type Card USB drives?

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Last Updated on Monday, 18 October 2010 22:12
 

How to use A08-2 removable Card USB Disk?

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請問名片MP3和U盤的工作原理是什麼呢?

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U盤是採用Flash晶片存儲的,在通電以後改變狀態,不通電就固定狀態,所以斷電以後資料能夠保存。 資料經由主控IC控制Flash的讀寫,在我的電腦可以看到晶片儲存文件內容及芯片使用狀況。 MP3也是採用Flash晶片存儲的,在通電以後改變狀態,不通電就固定狀態,所以斷電以後資料能夠保存。 資料經由主控IC控制Flash的讀寫,在我的電腦可以看到晶片儲存使用狀況。 MP3也是經由主控IC讀取Flash儲存的音樂檔案,並控制音樂檔案的播放、暫停、調整音量等功能。
 

Maximum output power

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Maximum output power is defined within a certain harmonic distortion index, to the power amplifier (for the MP3, the headset is the most common output for the amplifier) When input signal and the volume are set to maximum, the maximum power generated by the amplifier is called the maximum output power. For the MP3 available in the market, the maximum output power is generally 10mW~40mW.
Last Updated on Wednesday, 08 April 2009 01:30
 

The range of frequency response?

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Frequency response refers to a constant voltage output of the audio signal when connected to the system, speaker sound pressure generated by the change with the frequency increase or attenuation, phase changes with frequency and the phenomenon of sound pressure and phase associated with changes in the frequency relations (variation) is called the frequency response, frequency response range is the minimum effective sound frequency to a maximum effective range of sound frequencies, in hertz (Hz). Currently, MP3 players, general power-amplifier's operating frequency range of 20Hz-20kHz, this is exactly the scope of the human ear can hear the sound frequency range.
Last Updated on Wednesday, 08 April 2009 01:22
 
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