Electrostatic discharge event and transient signal detection and measurement device and method

• US 7,525,316 B2
• Filed: 09/06/2005
• Issued: 04/28/2009
• Est. Priority Date: 09/06/2005
• Status: Active Grant

• Current Assignee: Desco Industries Incorporated
• Original Assignee: 3M Innovative Properties Company (3M Company)
• Inventors: Kraz, Vladimir
• Primary Examiner(s): Dole; Timothy J
• Application Number:
  US11/220,934
• Publication Number:
  US 20070052425A1
• Time in Patent Office: 1,330 Days
• Field of Search: 324/457, 324/458
• US Class Current: 324/457
• CPC Class Codes: G01R 31/001 Measuring interference from external sources to, or emission from, the device under test, e.g. EMC, EMI, EMP or ESD testing measuring electromagnetic fields G01R29/08; circuits for generating HV pulses in dielectric strength testing G01R31/14

Abstract

An electrostatic discharge (ESD) event and transient signal detection and measurement device and method are described. The device and method are able to distinguish between an ESD event and other non-ESD events.

Claims

1. A device for the detection of electromagnetic emission events, comprising:

a receiver that receives an electromagnetic emission;

a low-bandwidth active electronic circuit with a bandwidth lower than a bandwidth of the received electromagnetic emission, the low-bandwidth active electronic circuit generating a slowly decaying output signal in response to the received electromagnetic emission having a predetermined rise time so that an electromagnetic emission event with a predetermined rise time is identified,

wherein the low-bandwidth active electronic circuit further comprises an operational amplifier comprising a first diode and a second diode placed between an inverting input of the operational amplifier and an output of the operational amplifier to increase the dynamic range of the gain of the operational amplifier.

2. A device for the detection of electromagnetic emission events, comprising:

a receiver that receives an electromagnetic emission;

a low-bandwidth active electronic circuit with a bandwidth lower than a bandwidth of the received electromagnetic emission, the low-bandwidth active electronic circuit generating a slowly decaying output signal in response to the received electromagnetic emission having a predetermined rise time so that an electromagnetic emission event with a predetermined rise time is identified; and

a pattern recognizer that recognizes a pattern of a particular electromagnetic emission based on a signal waveform.

3. The device of claim 2, wherein the pattern recognizer further comprises a window comparator.

4. The device of claim 3, wherein the window comparator determines if an envelope of an output signal of the low-bandwidth active electronic circuit is comparable to a predetermined signal having a predetermined envelope.

5. The device of claim 2, wherein the pattern recognizer further comprises a processor that is part of the device, the processor executing a program to perform the pattern recognition and determines if an envelope of an output signal of the low-bandwidth active electronic circuit is comparable to a predetermined signal having a predetermined envelope.

6. A device for the detection of electromagnetic emission events, comprising:

a receiver that receives an electromagnetic emission;

a low-bandwidth active electronic circuit with a bandwidth lower than a bandwidth of the received electromagnetic emission, the low-bandwidth active electronic circuit generating a slowly decaying output signal in response to the received electromagnetic emission having a predetermined rise time so that an electromagnetic emission event with a predetermined rise time is identified, wherein the low-bandwidth active electronic circuit further comprises an operational amplifier;

a high-pass filter coupled to an output of the low-bandwidth active electronic circuit; and

a peak detector coupled to an output of the high-pass filter, the peak detector having a time constant substantially similar to an output signal of the low-bandwidth active electronic circuit to an electromagnetic emission with the predetermined rise time.

7. The device of claim 6, wherein an output signal of the peak detector is measured to determine a strength of the electromagnetic emission.