★★★ ＜知的財産翻訳検定【第４回<和文英訳>試験】＞答案用紙 ★★★
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科 目： 電気・電子工学
氏 名： 平松 富男==========================================================================＜選択問題解答＞
問１
What is claimed is:1.

A network storage access terminal that can freely communicate with anauthentication server, a processing server, and a storage unit on a network and canperform storage connection between an external device and the storage unit, theterminal comprising:an interface unit for performing communication with the external device;
anauthentication

processingunit

forperformingapredeterminedauthentication processing in connection with the authentication server;a radio connection processing unit for receiving access point information on thestorage unit from the processing server, establishing a path to the storage unit on thenetwork based on the access point information, further transmitting storage
information, which includes at least a folder name and authority information
concerning the storage area of the storage unit, to the external device, and having theexternal device ackowledge the storage unit which is the access point; anda data processing and converting unit for receiving data from the external
device, performing predetermined data processing and converson on the data, andtransmitting the data-processed-and-converted data to the storage device which is thestorage access point.

問２
An optical frequency shifter, which can shift the frequency (wavelength) of entering
light by a fixed amount, is one of very important devices in the areas of opticalelectronics and quantum electronics covering a wide area of optical communicationsystems, optical measuring devices, spectral devices, etc.

For such optical frequency

shifters, there have been a variety of techniques proposed for optical frequency shifting.
For example, there are optical frequency shifters making use of acoustooptical effectamong those on the market today.

These frequency shifters use the diffracton

phenomenon of light by acoustic waves (compressional waves) propagating throughcrystal.

The optical frequency shifters using this principle, however, have relatively

low upper limit of operation frequency, which is several hundreds of MHz. This is duenot only to the problem that the propagation loss of acoustic waves through crystal isextremely large in the high-frequency range, but also to the basic problem that in thehigh-frequency range of about 1 GHz and above, the wavelength of acoustic waves issmaller than the wavelength of light waves and thus no diffraction occurs.

Hence, itis impossible for the optical frequency shifting method like this to increase the amountof optical frequency shift.

問3

In FIG. 1, a local oscillating circuit 10 includes an LC resonance circuit, which consistsof a coil L and a capacitor C1, and a transistor TR, which amplifies the oscillating
current generated by the coil L and the capacitor C1.

Here, one end of the coil L isgrounded via a diode D4, and also a tuning voltage VT is applied thereto via a resistanceR2.

And, the other end of the coil L is grounded via a diode D3 and a resistance R1,and also an intermediate point between the diode D3 and the resistance R1 is connected
to one end of the capacitor C1.

The other end of the capacitor C1 is connected to thebase of the transistor TR and is also grounded via a resistance R5.

The transistor TR

is so configured that the collector thereof is connected to a constant-voltage power
supply +B via a resistance R3 and is also connected to the base thereof via a resistanceR4.

Also, the emitter of the transistor TR is grounded via a capacitor C2 and aresistence R6, respectively.