Transcription of AD DA変換器 - Frontier Integrated Systems …
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AD DA変換器 - Frontier Integrated Systems …
10 . AD DA . Analog-to-Digital Converter Digital-to-Analog Converter 1. 2009/2/2 .. AD .. 010. 5 100. (V). 4 101. 3. 011. 000. 2. 010. 1. 011. 0 010. Ts 010.. 2. 2009/2/2 .. 1. fs .. fs 2fs 3fs 4fs 5fs 6fs 7fs 8fs . 3. 2009/2/2 .. 1. fs .. fs 2fs 3fs 4fs 5fs 6fs 7fs 8fs . 4. 2009/2/2 .. 1. fs .. fs 2fs 3fs 4fs 5fs 6fs 7fs 8fs . 5. 2009/2/2 .. DA AD . V ref n V out =. 2 n i =1. b i 2 i 1. Vout/Vref 1 1000.. 7/8 111. 6/8 110. 5/8 101.. 4/8 100. 3/8 011. 2/8 010. 1/8 001. 000. 0. 0. 1. 1/8. 2/8. 3/8. 4/8. 5/8. 6/8. 7/8. 101. 011. 001. 100. 010. 110. 111. 1000. 000.. 6. 2009/2/2 .. DA .. R-2R .. PWM . 7. 2009/2/2 .. DA . 2 . C = 2 i 1 C. i 0. 2n-1 2n-2 4 2 1 1 . V0. Cn Cn-1 C3 C2 C1 C0.. Vref bn bn-1 b2 b1. b3. n . 8. 2009/2/2 .. DA .. Vref n 0 + . i =1. biC i - Vo Co + + n MOS FET . Co - - . i =1. biC i .. 0 . n n V o (C 0 + . i =1. b i C i ) ( V ref V o ) b i C i = 0. i =1. 9. 2009/2/2 .. DA .. Charge Redistribution n . i =1. biC i Vo = n Vref n Co + b i C i +.
2009/2/2 広島大学岩田穆 集積回路基礎第10章 3 サンプリングによる高次成分発生 fs 2fs 3fs 4fs 5fs 6fs 7fs 8fs 周波数 高周波数成分
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