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Chip process corner detection circuit and method and chip

A technology for detecting circuits and process corners, applied in the field of chip process corner detection circuits, can solve the problems of no process corner detection means and inability to know the chip process corners, etc., and achieve the effect of improving detection accuracy

Pending Publication Date: 2022-04-29
BEIJING SMARTCHIP MICROELECTRONICS TECH COMPANY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After the chip is manufactured, each chip may be in a different process corner, and there is no corresponding process corner detection method to know the specific process corner of the chip.

Method used

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  • Chip process corner detection circuit and method and chip
  • Chip process corner detection circuit and method and chip
  • Chip process corner detection circuit and method and chip

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Embodiment Construction

[0054] The specific implementation manners of the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation manners described here are only used to illustrate and explain the embodiments of the present invention, and are not intended to limit the embodiments of the present invention.

[0055] figure 1 It is a schematic diagram of the chip process angle detection circuit of the present invention. The circuit includes: a symmetrical oscillating ring RO and at least two asymmetrical oscillating rings ARO1 and ARO2; the symmetrical oscillating ring RO is used to detect the SS, TT, and FF process angles of the chip according to the number of oscillations, and the number of oscillations is Obtained by the counting unit corresponding to the symmetrical oscillating ring RO; the asymmetrical oscillating ring ARO1 and ARO2 are used to detect the FS and SF process angles ...

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Abstract

The embodiment of the invention provides a chip process corner detection circuit and method and a chip. The circuit comprises a symmetric oscillation ring RO and at least two asymmetric oscillation rings ARO1 and ARO2, the symmetric oscillation ring RO is used for detecting SS, TT and FF process corners of the chip according to oscillation times, and the oscillation times are obtained through a counting unit corresponding to the symmetric oscillation ring RO; the asymmetric oscillation ring ARO1 and the asymmetric oscillation ring ARO2 are used for detecting FS and SF process corners of the chip according to the number of oscillation times, and the number of oscillation times is obtained through counting units corresponding to the asymmetric oscillation ring ARO1 and the asymmetric oscillation ring ARO2 respectively. According to the circuit, the process corner detection range and the temperature range of process corner detection are enlarged, and the detection precision is improved.

Description

technical field [0001] The invention relates to the field of chip design, in particular to a chip process angle detection circuit, method and chip. Background technique [0002] Process angle is a concept used to evaluate the impact of global variation. Each process corner is in an extreme situation. For the fastest process corner (Fast Corner), all process deviations increase the drive current of the transistor, so the speed is the fastest. But for the slowest process corner (Slow Corner), the device speed is slowed down by the process deviation. T represents the typical value (Typical). In addition to the fastest and slowest process corners, there are also some cross-process corners, such as the fastest p-channel transistor (p-FET) and the slowest n-channel transistor (n-FET). , or vice versa. Specifically, FF Fast-Fast (Fast nmos Fast pmos) indicates that the circuit is composed of the fastest p-FET and the fastest n-FET; TT Typical-Typical (Typical Typical) indicates ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/28H03K21/38
CPCG01R31/2858H03K21/38
Inventor 赵东艳李德建杨小坤李可然王于波杨立新沈冲飞冯曦邵瑾
Owner BEIJING SMARTCHIP MICROELECTRONICS TECH COMPANY
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