Frequency divider with funnel structure

Details Frequency divider with funnel structure Frequency divider with funnel structure

2006-02-21

2006-02-21

Callahan, Timothy P. (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Frequency or repetition rate conversion or control

C327S117000

Reexamination Certificate

active

07002380

ABSTRACT:
In a frequency divider enabling the division by N of a frequency Fe and comprising at least one prescaler followed by a division chain, the prescaler has at least one input for the frequency signal Fe to be divided, one input for a command NA of the basic division rank of the prescaler and one input for a command ΔNA coming from the division chain and enabling NA to be made to vary by one unit; the division chain comprises at least one division stage (K) comprising at least one divider by 2, giving a divided frequency F(K), a switch controlled by the divider by 2, the switch having one input for a piece of programming data R(K), one input for the carry signal RX(K+1) of the next stage and one output for the carry signal RX(K) for the previous stage. Application to the field of phase-locked loop frequency synthesis.

REFERENCES:
patent: 4011516 (1977-03-01), Heimbigner et al.
patent: 4179670 (1979-12-01), Kingsbury
patent: 4815018 (1989-03-01), Reinhardt et al.
patent: 5867068 (1999-02-01), Keating
patent: 5878101 (1999-03-01), Aisaka
patent: 6035182 (2000-03-01), Shurboff
patent: 6369623 (2002-04-01), Heinen

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