Semiconductor integrated circuit for use as a two-modulus presca

Details Semiconductor integrated circuit for use as a two-modulus presca Semiconductor integrated circuit for use as a two-modulus presca

1997-05-13

1998-11-24

Ton, My-Trang Nu

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Frequency or repetition rate conversion or control

377 48, H03B 1900

Patent

active

058413022

ABSTRACT:
A semiconductor integrated circuit suited for a two-modulus prescaler having a frequency dividing function 5.times.2.sup.n /5.times.2.sup.n +1 (n=0 or an integer of 1 or more) for use in high speed frequency dividing operation. Frequency dividing ratios are changed using a modulus control signal MC by a control circuit which is constituted by a level shift circuit or another slave circuit connected in parallel with a conventional slave circuit so as to remove a NOR conventionally required.

REFERENCES:
patent: 4745302 (1988-05-01), Hanawa et al.
patent: 5091699 (1992-02-01), Erickson et al.
patent: 5347558 (1994-09-01), Nikjou
patent: 5469116 (1995-11-01), Slemmer
patent: 5552732 (1996-09-01), Huang

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