| Temperature Independent Biasing을 사용한 DTV 중계기용 100Watt급 단위 전력증폭기의 구현 |
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이영섭, 전중성, 이석정, 예병덕, 홍창희 |
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| The 100Watt Unit Power Amplifier Using Temperature Independent Biasing for DTV Repeater Application |
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Young-Sub Lee, Joong-Sung Jeon, Seok-Jeong Lee, Byeong-Duck Ye, Tchang-Hee Hong |
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| Abstract |
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In this paper, the 100 watt unit power amplifier using temperature independent biasing for DTV (Digital Television) repeater application is designed and fabricated. The DC operation point of this unit power amplifier at temperature variation from 20 ℃ to 100 ℃ is fixed by active bias circuit. The variation of current consumption is the 100 watt unit power amplifier has an excellent characteristics of less than 0.6A. The implemented unit power amplifier has the gain over 12㏈, the gain flatness of less than 0.5㏈ and input and output return loss of less than 15㏈ over the DTV repeater frequency range (470~806㎒). This unit power amplifier yields intermodulation distortion(IMD) of more than 32㏈c at 2㎒ offset, which satisfies the IMD at output power of 100 watt (50㏈m). |
| Key Words:
디지털 TV;
Amplifier;Intermodulation distortion;Digital TV |
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