Clock distributing circuit

Details Clock distributing circuit Clock distributing circuit

1995-12-26

1998-03-24

Butler, Dennis M.

Electronic digital logic circuitry

Multifunctional or programmable

Array

395555, 326 93, G06F 104

Patent

active

057322490

ABSTRACT:
To improve the clock delay time and skew. A first resistance body (R1) and a second resistance body (R2) are provided at a terminal end node (N5) of a clock trunk line (1) composed of a doped polysilicon film or the like. Their elements (R1), (R2) are composed of the same film as the clock trunk line (1). Their resistance ratio is set so that the clamp level may be an inverted threshold of first and second local drivers (D2, D3), and the resistance values of both resistance bodies (R1, R2), and the value of interconnection resistance (R) of the clock trunk line (1) are set so that an amplitude of a clock signal at each of the nodes (N3, N4, N5) may be a potential corresponding to 1/2 of its peak-to-peak voltage at the same time. The amplitude of the clock signal from a start end node (N3) to a terminal end node (N5) decreases, and the delay time from an output of a clock driver (D1) to outputs of the local drivers (D2, D3) shaped in waveform is much shorter, and hence the clock skew of the outputs hardly occurs.

REFERENCES:
patent: 5481209 (1996-01-01), Lim et al.
patent: 5668484 (1997-09-01), Nomura
Proc. IEEE Conference on Computer Aided Design, pp. 336-339, 1991, Ren-Song Tsay, "Exact Zero Skew".
Proc. IEEE ICCD, pp. 118-122, Oct. 1986, H.B. Bakoglu, et al., "A Symmetric Clock-Distribution Tree and Optimized High-Speed Interconnections for Reduced Clock Skew in ULSI and WSI Circuits".

Affiliated with

Also associated with

Rating

Clock distributing circuit does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Clock distributing circuit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Clock distributing circuit will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2297430