公开(公告)号：US20170030954A1

公开(公告)日：2017-02-02

申请号：US15172101

申请日：2016-06-02

Applicant: ARM Limited

Inventor： Paul Nicholas WHATMOUGH ,  Shidhartha DAS ,  David Michael BULL

IPC: G01R27/26

CPC classification number: G01R23/07 ,  G01R23/02 ,  G01R23/04 ,  G01R27/04 ,  G01R27/26 ,  G01R27/32

Abstract: An apparatus and method are provided for detecting a resonant frequency giving rise to an impedance peak in a power delivery network used to provide a supply voltage. The apparatus includes resonant frequency detection circuitry that comprises test frequency control circuitry and a loading circuit. The test frequency control circuitry is arranged to generate control signals to indicate a sequence of test frequencies. A loading circuit is controlled by the control signals and operates from the supply voltage. In particular, in response to each test frequency indicated by the control signals, the loading circuit draws a duty-cycled current load through the power delivery network at that test frequency. Operation of the loading circuit produces a measurable property whose value varies in dependence on the supply voltage, thus enabling the resonant frequency to be determined from a variation in the value of that measurable property.

Abstract translation: 提供了一种用于检测在用于提供电源电压的功率传递网络中产生阻抗峰值的谐振频率的装置和方法。 该装置包括谐振频率检测电路，其包括测试频率控制电路和加载电路。 测试频率控制电路被布置成产生控制信号以指示测试频率的序列。 加载电路由控制信号控制，并从供电电压进行工作。 特别地，响应于由控制信号指示的每个测试频率，负载电路在该测试频率下通过电力输送网络抽取占空比的电流负载。 加载电路的操作产生可测量的性质，其值根据电源电压而变化，从而可以根据该可测量特性的值的变化来确定谐振频率。