Electronics Forum: high impedance circuits (Page 9 of 40)

PCB Delamination

Electronics Forum | Fri Jun 01 11:06:17 EDT 2012 | davef

Post-reflow delamination is almost always caused by entrapped moisture. Here's more from the fine SMTnet Archives ... http://www.smtnet.com/Forums/Index.cfm?CFApp=1&Message_ID=64774 As Graham Cooper suggests in an earlier posting on this thread, ba

Ghost circuit shorts under smt resisters only when they are located on solder side of pcb (glued down)

Electronics Forum | Fri Jul 23 14:07:52 EDT 1999 | Carl J. Odle

We are having a process related problem with pullup resistors on a controller card which has a I960 micro-processor. The controller monitors signal inputs and it's own resources then blinks a LED to indicate its working. The problem is that after a p

flex circuit

Electronics Forum | Mon May 15 02:31:21 EDT 2017 | robl

or pressing, or cutters and linishing if low volume. If high volume I'm with Pavel on routing.

No-clean solder paste

Electronics Forum | Wed Mar 21 18:32:45 EST 2001 | Steve

The design engineers I work with are blaming some circuit problems on what they think might be related to the no-clean flux residue. (It couldn't be the design.) Has any body else seen noise issues in high speed circuits related to no-clean flux resi

High Volume PCB Rework in INDIA, CHINA?

Electronics Forum | Mon May 22 02:18:53 EDT 2017 | hxamalia

Hello guys, Good day , it is Amalia from HX Circuit Technology Co.,Ltd in China, we are a prefessional PCB factory with many years. We are focusing on quick lead time for PCB with good service . please contact with me now ,thanks Email: amalia@hx-c

High Volume PCB Rework in INDIA, CHINA?

Electronics Forum | Mon May 22 02:24:14 EDT 2017 | hxamalia

Hello Sir, Good day , it is Amalia from HX Circuit Technology Co.,Ltd in China, we are a prefessional PCB factory with many years. We are focusing on quick lead time for PCB with good service . please contact with me now ,thanks Email: amalia@hx-cir

CL-1200 High Precision Automatic Solder Paste Printer

Electronics Forum | Thu Aug 31 09:11:53 EDT 2017 | hxamalia

Hello ALL Good day , it is Amalia from HX Circuit Technology Co.,Ltd in China, we are a prefessional PCB factory with many years. We are focusing on quick lead time for PCB with good service . please contact with me now ,thanks Email: amalia@hx-c

Defect reduction on RF design

Electronics Forum | Tue Sep 20 21:49:51 EDT 2005 | davef

2251 - Design Guide for the Packaging of High Speed Electronic Circuits 2252 - Design Guide for RF/Microwave Circuit Boards

Re: DFM / DFT information

Electronics Forum | Thu Jul 13 22:20:38 EDT 2000 | Dave F

=10 mils larger than lead 3 silk screen legend text weight >=10 mils 4 pads >=15 mils larger than finished hole sizes 5 place through hole components on 50 mil grid 6 no silk screen legend text over vias (if vias not solder masked) or holes 7 so

Piezoelectric-Noise problem due to cable

Electronics Forum | Wed Mar 02 05:02:46 EST 2005 | prabhu_jude

Hello, We are using a film piezo electric sensor to deduct and measure vibrations. A long twisted pair shielded cable is used to connect the sensor to the signal conditioning unit (the signal conditioning unit has to be kept at a distance from the se


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