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Measuring current on a die

A technology for measuring current and chips, which is applied in the direction of measuring electricity, measuring current/voltage, measuring electrical variables, etc., and can solve problems such as inaccurate results, difficulty in measuring analog accuracy, and current distortion

Inactive Publication Date: 2005-07-13
HEWLETT PACKARD DEV CO LP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Also, the equipment used to measure the current itself may also distort the current, giving inaccurate results
Therefore, it is difficult to measure the actual current supplied to the chip under operating conditions in order to confirm the simulation accuracy of this current during microprocessor and power supply design

Method used

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  • Measuring current on a die
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  • Measuring current on a die

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0025] refer to figure 1 , which shows a block diagram of a circuit board 100 of a central processing unit (CPU) on which a CPU module 103 is mounted. The CPU package 103 includes a card 106 and at least one semiconductor chip 109 . In addition, a power supply 113 is also included on the CPU circuit board 100 . In other embodiments, the power supply 113 may be configured in the CPU component 103 . As can be understood by those of ordinary skill in the art, the power supply 113 may be, for example, a regulated power supply or other suitable devices or circuits. The power supply 113 generates the voltage V 电源 and the current I flowing into the chip 109 dd . The CPU assembly 103 includes a test point 116 which allows the voltage V to be measured during the operation of the chip 109 itself dd and common voltage V ss The voltage across V.

[0026] During the operation of the chip 109, the power supply 113 supplies the system voltage V supply provided to the chip 109. In t...

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PUM

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Abstract

Various systems, methods, and programs embodied in computer readable media for measuring current in central processing unit (CPU) components are disclosed. To measure said current, the voltage V(t) across the power supply input of the chip (109) in the CPU assembly is determined on-site while the computer program is running in the chip (109). Then, the Fourier transform (Ff (V(t))) of the voltage is calculated from the voltage (V(t)). The current (Ff (Idd (t))) on the power supply input of the chip (109) in the frequency domain can then be calculated from the voltage Ff (V(t)) and the impedance (Zf), where the impedance (Zf) includes The impedance of the power loop to which the input is connected as a function of frequency. Finally, the current (Idd (t)) on the power supply input of the chip (109) is determined in the time domain by computing the inverse Fourier transform (Ff (Idd (t))) of the current in the frequency domain.

Description

technical field [0001] The present invention relates to methods and systems for measuring current on a chip. Background technique [0002] The development of microprocessor technology has been to reduce the power supply voltage which is more sensitive to noise interference, shorten the signal transit time, reduce the size of the chip, increase the power supply current and increase the clock speed. Thus, more and more important requirements are placed on the power supply of the microprocessor circuit. Generally speaking, such a requirement will create a significant current change between power and ground. [0003] Knowledge of the characteristics of supply current variations caused by the operation of a microprocessor is useful in predicting the integrity of signals in a microprocessor. This is because the noise entering the power loop caused by the change in current demanded by the microprocessor is proportional to the rate of change of current. Therefore, actual knowledg...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R19/00G01R19/25G01R27/02G01R31/28G01R31/30
CPCG01R31/3012
Inventor I·坎托罗维奇C·L·霍顿J·J·圣劳伦特
Owner HEWLETT PACKARD DEV CO LP