1. Pulse Response of 3 CDM Test Head
Three CDM current sensors Measured using two ea. 1 meter long coax cables
System 39 ps Risetime
BEI ps Risetime, 18 GHz bandwidth
ESDA 33 ps Risetime, 16 GHz ringing
June 8, 2012 Jon Barth

2. Time Domain Pulse Response
6 GHz Scope and two 1 Meter Coax Cables

3. 3 CDM Test Head Discharge Waveforms
CDM discharge waveforms made on RCDM 3 tester
Discharge from Special BEI flat surface JEDEC coins of standard diameters
6 GHz Tektronix scope
37 degrees F Dew Point

4. 500 Volt Small BEI Coin
BEI ESDA JEDEC

5. Impulse Comparison of 3 CDM Current Sensors
These waveforms are inverted
1 GHz Bandwidth

6. Impulse Comparison
3 GHz bandwidth

7. Impulse Comparison
6 GHz bandwidth

8. ESDA-JEDEC CDM Current Sensors
Equal response at 1 GHz
Different at 3 GHz
Very different responses at 6 GHz
BEI 5A Current sensor
Wide bandwidth
Flat response
Accurate measurements for CDM designers

9. Requirements for a Repeatable Standard
Each current sensor to be measured individually
Evaluating current sensors in the CDM system includes many variables
The Barth Model 5A current sensor is measured individually