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TLC2932IPWLE 数据表(PDF) 18 Page - Texas Instruments |
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TLC2932IPWLE 数据表(HTML) 18 Page - Texas Instruments |
18 / 24 page TLC2932 HIGH-PERFORMANCE PHASE-LOCKED LOOP SLAS097E – SEPTEMBER 1994 – REVISED MAY 1997 18 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 APPLICATION INFORMATION Using the low-pass filter in Figure 25(b) and divider ratio N, the transfer function for phase and frequency are shown in equations 1 and 2. Note that the transfer function for phase differs from the transfer function for frequency by only the divider value N. The difference arises from the fact that the feedback for phase is unity while the feedback for frequency is 1/N. Hence, transfer function of Figure 24 (a) for phase is F2(s) F1(s) + Kp @ KV N @ (T1 ) T2) 1 ) s @ T2 s2 ) s 1 ) Kp @KV @T2 N @(T1)T2) ) Kp @K V N @(T1)T2) (1) and the transfer function for frequency is F OUT(s) F REF(s) + Kp @ KV (T1 ) T2) 1 ) s @ T2 s2 ) s @ 1 ) Kp @K V @T2 N @(T1)T2) ) Kp @KV N @(T1)T2) (2) The standard two-pole denominator is D = s2 + 2 ζ ωn s + ωn2 and comparing the coefficients of the denominator of equation 1 and 2 with the standard two-pole denominator gives the following results. wn + Kp @ KV N @ (T1 ) T2) Solving for T1 + T2 T1 ) T2 + Kp @ KV N @ w 2 n (3) and by using this value for T1 + T2 in equation 3 the damping factor is z + wn 2 @ T2 ) N Kp @ K V solving for T2 T2 + 2 z w – N Kp @ K V then by substituting for T2 in equation 3 T1 + K V @ Kp N @ w 2 n – 2 z w n ) N Kp @ K V |
类似零件编号 - TLC2932IPWLE |
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类似说明 - TLC2932IPWLE |
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