Patent Application
20080008279
Embodiments of the present invention now will be described more fully with reference to the accompanying drawings, in which embodiments of the invention are shown. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. Like reference numerals refer to like elements throughout this application.
It will be understood that, although the terms first, second, etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are used to distinguish one element from another. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, without departing from the scope of the present invention. As used herein, the term “and/or” includes any and all combinations of one or more of the associated listed items.
It will be understood that when an element is referred to as being “connected” or “coupled” to another element, it can be directly connected or coupled to the other element or intervening elements may be present. In contrast, when an element is referred to as being “directly connected” or “directly coupled” to another element, there are no intervening elements present. Other words used to describe the relationship between elements should be interpreted in a like fashion (e.g., “between” versus “directly between,” “adjacent” versus “directly adjacent,” etc.).
The terminology used herein is for the purpose of describing particular embodiments and is not intended to be limiting of the invention. As used herein, the singular forms “a,” “an” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms “comprises,” “comprising,” “includes” and/or “including,” when used herein, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
Referring to
First of all, it is assumed that the variable inductor 13 is not included. The pair of flat plates has a self-capacitance and a self-inductance determined by its own structure. Consequently if the input signal of a resonance frequency determined by the capacitance and the inductance is supplied to the pair of flat plates 11 and 12, then the resonance signal appears in the clock flat plate 11. However, since the self-inductance is very small, the frequency of the resonance signal is very high.
In case that the variable inductor is connected at a corner between the pair of flat plates 11 and 12, the inductance of the pair of flat plates 11 and 12 is determined substantially by the variable inductor 13.
If the inductance of the variable inductor is L, and the capacitance of the pair of flat plates 11 and 12 is C, then the frequency f of the resonance signal generated between the pair of flat plates 11 and 12 can be approximately expressed by the formula 1 as follows:
The resonance signal of a target frequency ranging from tens of MHz to a few GHz can be generated by adjusting the inductance. The Inductance L is given by the formula 2 as follows:
Referring to FIG, 2, each length and width of two flat plates is 50 mm, the two flat plates are separated from each other by 1 mm, and an inductor has an inductance of 1 nH. Intensities of electric field between the flat plates are almost uniformly distributed except at a near corner to which the inductor is connected. Therefore, a resonance signal having almost same waveform can be extracted from an arbitrary position in most of region except at the near corner.
Referring back to
In some embodiments, the apparatus for distributing the clock signal may have a variable inductor set up inside a chip, or outside a chip. The variable inductor may be implemented with a variable inductance tuning device.
As mentioned above, the apparatus and the method for distributing a clock signal according to example embodiments of the present invention can supply a uniform clock signal to a whole system almost without skew. By adjusting an inductance, a resonance signal of a target frequency ranging from tens of MHz to a few GHz can be generated.
While the example embodiments of the present invention and their advantages have been described in detail, it should be understood that various changes, substitutions and alterations may be made herein without departing from the scope of the invention.
| Number | Date | Country | Kind |
|---|---|---|---|
| 10-2006-0062604 | Jul 2006 | KR | national |
