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參數(shù)資料
| 型號： | P13683EJ2V0AN00 |
| 英文描述： | uPC8106. uPC8109 and uPC8163 2.0GHz Silicon Frequency Up-converter ICs for Mobile Communications |
| 中文描述： | uPC8106。 uPC8109硅和uPC8163 2.0GHz的頻率上移動通信轉(zhuǎn)換器IC |
| 文件頁數(shù)： | 5/59頁 |
| 文件大?。?/td> | 447K |
| 代理商： | P13683EJ2V0AN00 |
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Application Note P13683EJ2V0AN00
5
1.
INTRODUCTION
In 1995, PDC (Personal Digital Cellular) services were launched in Japan, and PHS (Personal Handyphone
System) services were started soon afterward. As of this writing near the end of the 1999 business term, Japan’s
cellular phone subscriptions totaled about 42.5 million, which would indicate that approximately one out of every
three people in Japan has a cellular phone account. PHS subscriptions alone totaled nearly 6 million, which
represents about 4.6 percent of the nation’s population.
Mobile telephones using high frequencies need a frequency up-conversion function for RF signal transmission.
This up-conversion function is applied to the following two modulation methods: direct modulation (or RF modulation),
in which the signal is mixed up to the transmission frequency before being modulated, and other is indirect
modulation (up converter method or IF modulation), in which the modulated signal of the IF frequency is up-
converted to the transmission frequency. Frequency up-converters are used in all of these methods. NEC now adds
the
μ
PC8163 to the
μ
PC8106 and
μ
PC8109 silicon high-frequency monolithic integrated circuit lineup, which was
developed to provide core products for frequency up-converters used with any of the above frequency modulation
methods. This application note describes the usage and applications of this up-converter series.
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