Lecture 25

# Lecture 25 - er’s Computation Pad No 937 811E nginp C‘...

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Unformatted text preview: er’s Computation Pad No. 937 811E nginp C‘ L e, :64 aim/5 wees/1 Bin 2 + 'H + bNZ‘ N 4nd: lie/D. 7&2 Cum/ ' ; vmfmlz‘1 +b22'2 + +bN2’N) = vin wlwre 2 l 1 *‘VLSB 5 Vx < EVLSB 3/4 1/2 v L33 = 1 = 1 L88 1/4 V'°' 4 o oo 01 1o 11 (100) v Bo”t L33 = 1/4 = 1 LSB'; ref Table 1 1.1 Some 4-bit signed digital representations Normalized Number number +7 +7/8 +6 +6/8 +5 +5/8 +4 +418 +3 +3/8 +2 +2/8 +1 +1/8 +0 +0 (~0) (-0) —1 —1/8 —2 —2/8 -3 —3/8 —4 —4U8 —5 ~5/8 —6 —6/8 —-7 —7/8 —-8 —8/ 8 Sign magnitude 0111 0110 0101 0100 0011 0010 0001 0000 (1000) 1001 1010 1011 1100 1101 1110 1111 1’s ()fTSet 2’s complement binary complement 0111 1111 0111 0110 1110 0110 0101 1101 0101 0100 1100 0100 0011 1011 0011 0010 1010 0010 0001 1001 0001 0000 1000 0000 (1111) 1110 0111 1111 1101 0110 1110 1100 0101 1101 1011 0100 1100 1010 0011 1011 1001 0010 1010 1000 0001 1001 0000 1000 62:4 4 93 0 gear P- 2/7 SuccessA/e ﬂ/OFWV; MW. M'_#‘M‘¢ , e A/ A/ C/oc/C 7c/e5 ﬂ/ymzdugq 4AA N-éithA/ém (2 kip—[5 Signed input [.4 No. 811p Enqineer’s Computation Pad - 1 ——~w—.:i: ‘_.—n \ 7‘7“ L) H n VD/A —> VD/A — (Vref/2i+1) qr“; e :‘7 r- Successive-approximation register (SAR) and control logic u— b“ -> - {- D/A converter D/A converter-based successive-approximation converter. VD/A ref NO. 937 SHE Engineer’s Emmamjation Pad AV?“ 7/nT)= MAT} +XI(h-')T] 'L A («d-«\$7 ﬂ 11> __._.— XL(n.l)r-! VOW) {4' f—g V041”) 1‘ \ —_ -sz \m m») _ l- a ' r (w 2 ~ #2? 10 XJ) its: eg+632) e, 7- ,__————-——"" g Q 2 0 ' J, ‘MDT “5‘2" " CJ’Q" 605% -jw‘r f Mr (446231); Mange =0 f‘znbd afa'r’ri- 1 H a I/ ’9 '2 ‘ I 22:— w m, aw: V x047) %' vénT _'__ 7((HT) —- )(FM‘I)T1 b9 ) '2— Dcze-JW-o Ajzol/ w” _ . a ' 3:5— e'jwr"‘ L92 =1 1/ u ‘ 2 L I e—Jur {JQLZI‘(&3%T, e'JLSZ—r) 7' z 7 jqu Suki-£4“- s Dik-IM 17 Mid—7v— WT) W WW» xizn-orj— [mm +— A 9... 4w? Y[i«e" ] x6 ‘ _ér575\$) - A e edwt ~ J X z ’_ em)? 2 = an< “‘47) be . “’00 ‘ml 27 ﬂb ., Wﬂzué/et ,k/iﬂea WW~ mm, , BMM‘U [glactc%1 "mﬂnyﬂe—Mfwék wawu " Off/fer; J 4:9 \$7419 I (nu! 99mg K2 :qugH-t—g 1ES>4/0-/07,‘(:’vq-9/uh‘%-_ I; €54 4/732_.Q';__ ! l A ['L lé A1 QEDc'g ! I OS»? 118 (928 6‘! 2Tb /924 /26 _,LDE-7?”—— INEM\$Y M VMIQGCS ffBC A/ {#4773} mm S‘IVRMA-g 74A£ 7'8 2‘? " an: i l i l I } 6N+L8 éN +I.3 +1012? (OS/a) (0M ~/(1* 5? /:7(os.e> 3” III" I. 00 SHEETS 22-144 200 SHEETS “' ' ~ ' 2201 42 ' Q9...) Fi . 14.10 Secondo'rder A2 modulator. '- 3h” 5 9 Lara Wad->1 = E” - P SNRmax = lOlogGTS) = 1010g622~)+ 1010g[34(08R)5] 7t e 0f, equivalently, SNRmax = 6.02N + 1.76 —12.'9 + 501054089) Second-order First—order fs» 5 ﬁg. 14.] I Some different noiseshaping transfer ﬁmcﬁons. 11/ o s R SNKMAY (2ND OJEDEK- A2) 1 1(9 Syd [ 12.8 /oac5{32 5" 3.0 SHEEYS 00 SHEETS 0.0 sums 22-141 22-142 1 22-144 2 _ ® f—“ﬂ (/o-m-rs yya, F442; n1? 0,0 (hug -Jﬂwd \M v (44, Ava?" IVTF qﬁétwocZéry" . g If imfgﬁr-a/Q- DC > 05¢, [new bx In.on < 0.3d5 v <4.’ ...
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Lecture 25 - er’s Computation Pad No 937 811E nginp C‘...

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