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TRU050-GKCGB-65M0000000 Datasheet(PDF) 8 Page - Vectron International, Inc |
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TRU050-GKCGB-65M0000000 Datasheet(HTML) 8 Page - Vectron International, Inc |
8 / 14 page TRU050, VCXO Based PLL Vectron International, 267 Lowell Rd, Hudson NH 03051-4916 Tel: 1-88-VECTRON-1 • Web: www.vectron.com Page 8 of 14 Rev: 26Aug2008 Figure 7. SPICE Model *****TRU050 ac Loop model vi 1 0 ac 1 ri 1 0 1K *****Phase Detector e1 2 0 1 0 1 (for closed loop response use: e1 2 0 1 12 1) r2 2 3 30K c1 2 0 60p *****Phase Detector Gain=0.53 x Data Density (Data Density=1 for clocks) for 5 volt operation and = 0.35 * Data Density for 3.3 volt operation e2 4 0 3 0 .35 *****Loop filter r1 4 5 60K c2 5 0 10p rf 5 6 90K cf 6 7 1.0u e3 7 0 5 0 –10000 ***** VCXO, Input Bandwidth=50kHz r5 7 8 160K c4 8 0 20p *****VCXO Gain x 2pi (Example, use OUT1 x 100ppm x 2 x pi) e4 9 0 8 0 12214 *****1/S model r6 9 10 1000 c5 10 11 0.001 e5 11 0 10 0 –1e6 ****Divide by N e6 12 0 11 0 1 r8 12 0 1K The bold numbers are user selectable R/C, data density, VCXO frequency and divide- by values, and are from figure 11. Vi Ri E1 R2 C1 E2 R1 C2 Rf Cf E3 R5 C4 E4 R6 C5 E5 E6 R7 12 3 4 5 6 7 8 9 10 11 12 |
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