High-precision clock chip territory structure with temperature compensation function

Abstract

The invention discloses a high-precision clock chip territory structure with a temperature compensation function. A basic rule is that a sensitive analog module which has a small signal and is easy to interfere gets away from a high-frequency digital module as much as possible; and the sensitive analog module and the high-frequency digital module are isolated by a high-amplitude analog module (such as a buffer and a comparator) and a low-speed digital module. The territory comprises a first territory region, a second territory region, a third territory region, a fourth territory region, a fifth territory region, a sixth territory region and a seventh territory region; the seventh territory is distributed around a clock chip territory, and other territories are arranged in the center of the chip; the first territory supplies a reference source to other territory regions; the second territory region is connected with the third territory region; the third territory region is connected with the sixth territory region; the sixth territory region is connected with the fourth territory region; and the fourth territory region is connected with the fifth territory region. According to the high-precision clock chip territory structure with the temperature compensation function, the sub territories are fixedly arranged, and the positions are rational in arrangement; and moreover, a power ground factor, a matching factory, a shielding factor and an interconnection factor are comprehensively considered, so that the influence of noise of a digital circuit switch on an analog circuit is reduced to the maximum extent, and the design success rate of the high-precision clock chip territory structure with the temperature compensation function is guaranteed.

Description

technical field [0001] The invention relates to the technical field of integrated circuit design, in particular to a high-precision clock chip layout structure with temperature compensation Background technique [0002] At present, the high-precision clock chip with temperature compensation has the advantages of high-precision frequency stability, small size, low power consumption, and high reliability. It is widely used in various electronic products, such as smart grids, wireless communication base stations, based on SONET and synchronous Ethernet. core and edge routers, IP clocks and instruments, etc. [0003] The high-precision clock chip with temperature compensation is mainly composed of RTC (real time clock), temperature-compensated crystal oscillator and non-volatile memory EEPROM, wherein RTC is a digital circuit, and temperature-compensated crystal oscillator is an analog circuit. In general, analog ICs are much more sensitive to noise than digital ICs. For digit...

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Problems solved by technology

[0004] In order to solve the problem that the clock chip performance is not up to standard due to unreasonable layout layout, the present invention provides a new high-precision clock chip layout structure with temperature compensation

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