Optimized computation of first and second divider values for a p

Details Optimized computation of first and second divider values for a p Optimized computation of first and second divider values for a p

1997-04-30

2000-05-16

De Cady, Albert

Error detection/correction and fault detection/recovery

Pulse or data error handling

Testing of error-check system

332127, 331 16, 331 25, G06F 1100

Patent

active

060651407

ABSTRACT:
Given a target frequency (F.sub.VE), a reference frequency (F.sub.R), an error limit (E.sub.L), and a first divider range (150), a first (R) and a second (N) integer divider value are computed. First, an initial first divider (R) is selected (152). Then, a second divider (N) is computed as equal to the target frequency (F.sub.VE) divided by the reference frequency (F.sub.R) multiplied times the selected first divider (154). Then an error term (E) is computed to quantify the error introduced by using integers as dividers (156). The divider terms are accepted (166) if the error term is less than the error limit (158). Otherwise, a new first integer divider (R) is selected (160), repeating the computation of the second (N) divider (154), the computation of the error (E) term (156), and the test of the error term (E) against a limit as a loop (158). This loop is repeated until either the error term (E) is less than the error (E.sub.L) limit (158), or the selected first divider term (R) is outside its specified range (162).

REFERENCES:
patent: 4314208 (1982-02-01), Munday
patent: 4451930 (1984-05-01), Chapman et al.
patent: 4940950 (1990-07-01), Helfrick
patent: 4975931 (1990-12-01), Cosand
patent: 5021754 (1991-06-01), Shepherd et al.
patent: 5307071 (1994-04-01), Arnold et al.
patent: 5325075 (1994-06-01), Rapeli

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