Conformity Magazine - September 2008 - (Page 34) as shown in Figure 3. This is much longer than the RC time constant in any reasonable dynamic clamp circuit. When the HBM pulse in the simulator occurs, node A may already be well above the nMOS threshold voltage. A further increase in VDD caused by the HBM current pulse will not turn off the first stage nMOS device. The increase in VDD will result in a turn on of the pMOS device in the first stage. The voltage at the input to the second stage of the inverter chain, node C, will be the result of a battle between the first stage’s n and p channel devices. This is a battle that the nMOS device often wins, keeping node C, and therefore node B, low and the large nMOS in an off state. PPV and the Real World The discovery of the PPV presented a dilemma: is this a phenomena that is unique to an ESD simulator, or is it a problem in the real world? Asked another way, do we need to fix the HBM simulator, or do we need to fix or not use dynamic clamps on low leakage circuits? Figure 2: Measured HBM waveform for 2000V into a short Figure 3: PPV measured across a 10V Zener diode and with 1MΩ and 10kΩ across the Zener 3 Conformity September 2008 http://www.monroe-electronics.com http://www.kikusui.us
Table of Contents Feed for the Digital Edition of Conformity Magazine - September 2008 Conformity Magazine - September 2008 Contents Editor’s Note Commission Adopts Regulations for Internet-Based TRS Services Another Company Fined for Non-Compliance with HAC Requirements FCC Extends “Do-Not-Call” Registry Compliance Requirements Marketing Company Gets $1.4 Million Fine for Junk Faxes EU Commission Codifies Directive on TTE Market Competition EU Commission Releases Updated Standards List for the R&TTE Directive Updated Standards List for the “New” Low Voltage Directive Released New Standards List Released for the EU’s Machinery Directive The ESD Association: Voluntary Standards in Action ESD Open Forum Medical EMC Standards: Towards the 4th Edition of IEC 60601-1-2 iNARTE Informer Pre-Pulse Voltage in the HBM ESD Model Digital Interfaces and EMC Performance ESD Design Buyer’s Guide Product News Commission Publishes Updated Standards List for the EU’s Personal Protective Equipment Directive FDA Links “Human Factors” to Adverse Events with Medical Devices CPSC Actions in the News IEC Standards Update UL Standards Update Product Reviews Telcordia Standards Update From Our “You Can’t Make This Stuff Up” Department Looking Back: Items from Past Issues of Conformity Advertisers Conformity Magazine - September 2008 Conformity Magazine - September 2008 - Conformity Magazine - September 2008 (Page Cover1) Conformity Magazine - September 2008 - Conformity Magazine - September 2008 (Page Cover2) Conformity Magazine - September 2008 - Conformity Magazine - September 2008 (Page 3) Conformity Magazine - September 2008 - Contents (Page 4) Conformity Magazine - September 2008 - Contents (Page 5) Conformity Magazine - September 2008 - Editor’s Note (Page 6) Conformity Magazine - September 2008 - Editor’s Note (Page 7) Conformity Magazine - September 2008 - Editor’s Note (Page 8) Conformity Magazine - September 2008 - Editor’s Note (Page 9) Conformity Magazine - September 2008 - FCC Extends “Do-Not-Call” Registry Compliance Requirements (Page 10) Conformity Magazine - September 2008 - New Standards List Released for the EU’s Machinery Directive (Page 11) Conformity Magazine - September 2008 - The ESD Association: Voluntary Standards in Action (Page 12) Conformity Magazine - September 2008 - The ESD Association: Voluntary Standards in Action (Page 13) Conformity Magazine - September 2008 - The ESD Association: Voluntary Standards in Action (Page 14) Conformity Magazine - September 2008 - The ESD Association: Voluntary Standards in Action (Page 15) Conformity Magazine - September 2008 - The ESD Association: Voluntary Standards in Action (Page 16) Conformity Magazine - September 2008 - The ESD Association: Voluntary Standards in Action (Page 17) Conformity Magazine - September 2008 - ESD Open Forum (Page 18) Conformity Magazine - September 2008 - ESD Open Forum (Page 19) Conformity Magazine - September 2008 - Medical EMC Standards: Towards the 4th Edition of IEC 60601-1-2 (Page 20) Conformity Magazine - September 2008 - Medical EMC Standards: Towards the 4th Edition of IEC 60601-1-2 (Page 21) Conformity Magazine - September 2008 - Medical EMC Standards: Towards the 4th Edition of IEC 60601-1-2 (Page 22) Conformity Magazine - September 2008 - Medical EMC Standards: Towards the 4th Edition of IEC 60601-1-2 (Page 23) Conformity Magazine - September 2008 - Medical EMC Standards: Towards the 4th Edition of IEC 60601-1-2 (Page 24) Conformity Magazine - September 2008 - Medical EMC Standards: Towards the 4th Edition of IEC 60601-1-2 (Page 25) Conformity Magazine - September 2008 - Medical EMC Standards: Towards the 4th Edition of IEC 60601-1-2 (Page 26) Conformity Magazine - September 2008 - Medical EMC Standards: Towards the 4th Edition of IEC 60601-1-2 (Page 27) Conformity Magazine - September 2008 - Medical EMC Standards: Towards the 4th Edition of IEC 60601-1-2 (Page 28) Conformity Magazine - September 2008 - Medical EMC Standards: Towards the 4th Edition of IEC 60601-1-2 (Page 29) Conformity Magazine - September 2008 - iNARTE Informer (Page 30) Conformity Magazine - September 2008 - iNARTE Informer (Page 31) Conformity Magazine - September 2008 - Pre-Pulse Voltage in the HBM ESD Model (Page 32) Conformity Magazine - September 2008 - Pre-Pulse Voltage in the HBM ESD Model (Page 33) Conformity Magazine - September 2008 - Pre-Pulse Voltage in the HBM ESD Model (Page 34) Conformity Magazine - September 2008 - Pre-Pulse Voltage in the HBM ESD Model (Page 35) Conformity Magazine - September 2008 - Pre-Pulse Voltage in the HBM ESD Model (Page 36) Conformity Magazine - September 2008 - Pre-Pulse Voltage in the HBM ESD Model (Page 37) Conformity Magazine - September 2008 - Digital Interfaces and EMC Performance (Page 38) Conformity Magazine - September 2008 - Digital Interfaces and EMC Performance (Page 39) Conformity Magazine - September 2008 - Digital Interfaces and EMC Performance (Page 40) Conformity Magazine - September 2008 - Digital Interfaces and EMC Performance (Page 41) Conformity Magazine - September 2008 - Digital Interfaces and EMC Performance (Page 42) Conformity Magazine - September 2008 - Digital Interfaces and EMC Performance (Page 43) Conformity Magazine - September 2008 - Digital Interfaces and EMC Performance (Page 44) Conformity Magazine - September 2008 - Digital Interfaces and EMC Performance (Page 45) Conformity Magazine - September 2008 - Digital Interfaces and EMC Performance (Page 46) Conformity Magazine - September 2008 - Digital Interfaces and EMC Performance (Page 47) Conformity Magazine - September 2008 - ESD Design (Page 48) Conformity Magazine - September 2008 - ESD Design (Page 49) Conformity Magazine - September 2008 - ESD Design (Page 50) Conformity Magazine - September 2008 - ESD Design (Page 51) Conformity Magazine - September 2008 - ESD Design (Page 52) Conformity Magazine - September 2008 - ESD Design (Page 53) Conformity Magazine - September 2008 - Buyer’s Guide (Page 54) Conformity Magazine - September 2008 - Buyer’s Guide (Page 55) Conformity Magazine - September 2008 - Buyer’s Guide (Page 56) Conformity Magazine - September 2008 - Buyer’s Guide (Page 57) Conformity Magazine - September 2008 - Buyer’s Guide (Page 58) Conformity Magazine - September 2008 - Buyer’s Guide (Page 59) Conformity Magazine - September 2008 - Buyer’s Guide (Page 60) Conformity Magazine - September 2008 - Buyer’s Guide (Page 61) Conformity Magazine - September 2008 - Buyer’s Guide (Page 62) Conformity Magazine - September 2008 - CPSC Actions in the News (Page 63) Conformity Magazine - September 2008 - UL Standards Update (Page 64) Conformity Magazine - September 2008 - Looking Back: Items from Past Issues of Conformity (Page 65) Conformity Magazine - September 2008 - Advertisers (Page 66) Conformity Magazine - September 2008 - Advertisers (Page Cover3) Conformity Magazine - September 2008 - Advertisers (Page Cover4)
For optimal viewing of this digital publication, please enable JavaScript and then refresh the page. If you would like to try to load the digital publication without using Flash Player detection, please click here.