Title:
電源ノイズ測定回路および測定方法
Document Type and Number:
Japanese Patent JP5141052
Kind Code:
B2
Abstract:
A power supply noise measuring circuit and measuring method are provided which are capable of evaluating a frequency component of power supply noise that affects performance and functions in a circuit by using a cross-correlation function. The power supply noise measuring circuit includes a SIN wave generating circuit which generates a sine wave signal having a variable frequency in a constant amplitude, a cross-correlation processing circuit which calculates and output a cross-correlation function between power supply noise and a sine wave signal fed from the SIN wave generating circuit, a comparator which compares a cross-correlation function output with a specified threshold voltage and which generates an output when the cross-correlation function output exceeds the threshold voltage, and a counter which counts the number of occurrences of the output from the comparator within a specified time of period.
Inventors:
Mikihiro Kajita
Application Number:
JP2007059289A
Publication Date:
February 13, 2013
Filing Date:
March 08, 2007
Export Citation:
Assignee:
NEC
International Classes:
G01R23/16; G01R29/00; G01R29/26
Domestic Patent References:
| JP2000258478A | ||||
| JP2003332442A | ||||
| JP2004289369A | ||||
| JP2003517247A | ||||
| JP4505366A | ||||
| JP60219562A | ||||
| JP2005249408A | ||||
| JP2000341100A |
Attorney, Agent or Firm:
Seisei Nishimura