- () - Analog-to-Digital Converter (ADC), . - ( , ). , , , , , .
, (, , ). , .
L (Length of Scale) ( ) . ( ) . L .
- () - Number of Bits - Number of Digits. - (), L = 2 n. , = 11 L = 2048. - n , L = 10 n. , , , L = 9999 ( - ), L = 10 000. , ( ), , .. , ( ) . () -.
- () , .. L. , L = 999 ( - 1000 ).
- . (, 4 ), (, = 3 1/2 ). 0 9. , L = 999, , . ( ) , , 0 1 ( , ), , , - 0 9 ( ). 1999. 3 1/2 .
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R (Resolution) - , L (R = 1: L) . L, R , , . q (quant) - () U ( ) L:
q = U / L.
q Least Significant Bit (LSB), - Least Significant Digit (LSD).
, L = 1999 ( 2000 ) U = 2 , ( ) q = 1 . q, , , . q .
D - . , .. . U D. , .
D - (. 73).
D - , q. q /2 ( - ). D q /2. , . 2... 5 (.. 2 q... 5 q).
. 66 N U, : n, L, R, q D (.. , ), - U. = 1 (. . 66, ) - 0 1.
. 66. , : - = 1 ,
L = 21 = 2, R = 1: 2; - = 2 , L = 22 = 4, R = 1: 4; - = 3 , L = 23 = 8, R = 1: 8
= 2 (. . 66, ) L = 4. = 3 (. . 66, ) L = 8. , L ( Nm), D.
3
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n, | L, | R |
0,016 (1,6%) | ||
0,0039 (0,39 %) | ||
0,00098 (0,098 %) | ||
0,00024 (0,024 %) | ||
16 384 | 0,000061 (61 ) | |
65 536 | 0,000015 (15 ) | |
262 144 | 0,0000038 (3,8 ) | |
1 048 576 | 0,95 | |
4 194 304 | 0,24 | |
16 777 216 | 0,060 |
. 1 (part-per-million) .
. 3 L R, .
R ( ).
F - , ( ), .. , . F - (Samples/s), /, . , , F = 1 ( F = 1 /, F = 1 MSamples/s), , 1 1 , () .
( ) T - , F , , . T : , , .. , , F = 1 , T = 1 .