LINEAR TECHNOLOGY LTC6909 3 i ka 8 Output Multiphase Oscillator me SSFM
HOIKE
Hōʻike ka 1446 kaapuni hōʻike i ka LTC6909 multi-ple output oscillator me ka hoʻolaha ʻana i ke alapine frequency modulation (SSFM). He mea maʻalahi ka LTC®6909 e hoʻohana i ka oscillator pololei e hiki ai ke hāʻawi i nā huahana 1-, 2-, 3-, 4-, 5-, 6-, 7- a i ʻole 8-phase synchronized. Hiki i ka LTC6909 pālahalaha spectrum frequency modulation (SSFM), hiki ke hoʻoikaika i ka hana electromagnetic compatibility (EMC). ʻEwalu mau mea hoʻopuka kaʻawale e hāʻawi mai i ʻewalu rail-to-rail, 50% duty cycle clock signals. Me ka hoʻohana ʻana i ʻekolu mau manaʻo loiloi, ua hoʻonohonoho ʻia nā mea hoʻopuka no ka hoʻokaʻawale ʻana, mai 45 ° a 120 ° (ʻekolu a ʻewalu mau pae). Hiki ke hoʻopaʻa haʻahaʻa a hoʻonohonoho ʻia paha nā huahana uaki no Hi-Z. ʻO kahi pale pale hoʻokahi (RSET) i hui pū ʻia me ka hoʻonohonoho hoʻonohonoho ʻana, hoʻonohonoho i ka alapine puka, e pili ana i kēia ʻano:
fOUT = (20MHz x 10k)/(RSET x PH)
kahi PH = 3, 4, 5, 6, 7 a i ʻole 8
ʻO ka laulā fOUT he 12.5kHz a 6.67MHz.
ʻO ka PH0, PH1 a me ka PH2 logic inputs e wehewehe i ka LTC6909 multi-phase mode o ka hana a me ka hoʻomalu i kāna mau hoʻopuka penei:
PH2 PH1 PH0 MODE
0 0 0 Ke lana nei nā mea hoʻopuka a pau (Hi-Z)
0 0 1 Paʻa haʻahaʻa nā huahana a pau
0 1 0 3-Phase Mode (PH = 3)
0 1 1 4-Phase Mode (PH = 4)
1 0 0 5-Phase Mode (PH = 5)
1 0 1 6-Phase Mode (PH = 6)
1 1 0 7-Phase Mode (PH = 7)
1 1 1 8-Phase Mode (PH = 8)
Loaʻa i kahi DC1446 kahi LTC6909 a me nā pahu hoʻāʻo no nā huahana ʻewalu. Hāʻawi ʻia nā mea lele ma luna o ka papa no ka hoʻonohonoho ʻana i ka LTC6909 phase inputs (PH0, PH1 a me PH2) a me ka modulation SSFM. Hoʻokomo mua ʻia ka resis-tor (RSET) ma luna o ka papa me kahi 100k surface mount re-sistor (eia kekahi, ʻelua mau pahu pine i hoʻolako ʻia no ka hoʻohana ʻana i kahi pale RSET alakaʻi).
Hoʻolālā files no keia papa kaapuni aia.
Kāhea i ka hale hana LTC. LTC, LT he mau inoa inoa inoa o Linear Technology Corporation.
KE KUMU WAIWAI HOPE
Maʻalahi ka hoʻonohonoho ʻana a me ka hoʻāʻo ʻana i ka pōʻai hōʻike 1446. E nānā i ka Figure 1 no ka hoʻonohonoho hoʻāʻo wikiwiki a hahai i ke kaʻina hana ma lalo nei:
- E kau i nā mea lele ma kēia mau kūlana:
JP3 (PH0) i V+, JP4 (PH1) i V+, JP1 (PH2) i V+ a me JP1 (MOD) i SSFM OFF. - 2. E hoʻonoho i ka mana i 5V.
- E ho'ā i ka lako mana.
- Me ka ʻimi 10x i hoʻopili ʻia me OUT1, pono e hōʻike ka oscilloscope i kahi 5V, 250kHz, squarewave (± 4.5%).
HOOMAKA IKI 
MANAʻO: Hiki i nā huahana 6909 (OUT1-OUT8) ke hoʻokele i nā ukana 1k a me 50pF. Inā hoʻohana ʻia kahi mea loiloi kikoʻī e ana i ka bandwidth spectrum pālahalaha a laila e hoʻohana i kahi probe impedance kiʻekiʻe e nānā i nā huahana (ʻo ka mea maʻamau ka impedance hoʻokomo o kahi spectrum analyzer he 50 ohms).
DEMO CIRCUIT 1446 Alakaʻi Hoʻomaka wikiwiki – LTC6909 3 A 8 OUTPUT MULTIPHASE OSCILLATOR ME SSFM 
DC1446 PAPA PAPA
'ikamu helu kuhikuhi ʻāpana wehewehe mea hana / ʻāpana #
1 1 C1 CAP., X7R, 10uF, 10V, 20% 1206 AVX, 1206ZC106MAT2A
2 2 C5, C2 CAP., X7R, 0.1uF, 16V, 10% 0402 TDK, C1005X7R1C104K
3 2 C3,C6 CAP., X5R, 1uF, 6.3V, 10% 0402 TDK, C1005X5R0J105K
4 1 C4 CAP., C0G, 1000pF, 25V, 5% 0402 TDK, C1005C0G1E102J
5 2 E1,E2 JACK, MAI'A KEYSTONE, 575-4
6 10 E3-E12 KULA HOʻOʻI, TURET, .094″ pbf MILL-MAX, 2501-2-00-80-00-00-07-0
7 3 JP1,JP3,JP4 3 PIN 0.079 PONO LALA HOKI SAMTEC, TMM103-02-LS
8 1 JP2 2X4, 0.079 PONO LALANI PAlua SAMTEC, TMM104-02-LD
9 4 xJP1-xJP4 SHUNT, .079″ CENTER SAMTEC, 2SN-BK-G
10 0 RSET(wehe) Re., 0805
11 2 E13,E14 Pin, 0.057 puka Mill-Max, 8427-0-15-15-30-84-04-0
12 1 U1 IC., LTC6909CMS, MSOP-16 Linear Tech., LTC6909CMS
13 4 (KU-PA'I) KU'I-PA'I, NYLON 0.375″ KEYSTONE, 8832(SNAP ON)
Palapala / Punawai
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LINEAR TECHNOLOGY LTC6909 3 i ka 8 Output Multiphase Oscillator me SSFM [pdf] Ke alakaʻi hoʻohana LTC6909 3 A 8 Hoʻopuka Multiphase Oscillator me SSFM, LTC6909, 3 a 8 Hoʻopuka Multiphase Oscillator me SSFM |
