Inductive Coupling Coefficient

How about Interociter parts?

--
Anyone wanting to run for any political office in the US should have to 
have a DD214, and a honorable discharge.

I've done tube designs, back when they were the only devices that could handle 10-20kV

I finally successfully replaced in one location, the high voltage drivers. Using [Delco?] 1200Vceo NPN transistors and a step up transformer ...inside the loop to remove the characteristics of the transformer. All to get accurate 5kVpp audio sawtooth waveforms [better than 0.1% linearity] not bad when you consider those !@#$#! resistors have voltage coefficients that're out of sight!

longer,

like

makes

more

this

OK fine. Galvanically isolated to very many kilovolts? Why do they want this?

?-)

5mm-10mm spacing is all I know. ...Jim Thompson

--
| James E.Thompson                                 |    mens     | 
| Analog Innovations                               |     et      | 
| Analog/Mixed-Signal ASIC's and Discrete Systems  |    manus    | 
| San Tan Valley, AZ 85142     Skype: skypeanalog  |             | 
| Voice:(480)460-2350  Fax: Available upon request |  Brass Rat  | 
| E-mail Icon at http://www.analog-innovations.com |    1962     | 
              
I love to cook with wine.     Sometimes I even put it in the food.

Doesn't TI make a chip good for the low KV region?

Two separate boards, not just an isolation barrier. ...Jim Thompson

--
| James E.Thompson                                 |    mens     | 
| Analog Innovations                               |     et      | 
| Analog/Mixed-Signal ASIC's and Discrete Systems  |    manus    | 
| San Tan Valley, AZ 85142     Skype: skypeanalog  |             | 
| Voice:(480)460-2350  Fax: Available upon request |  Brass Rat  | 
| E-mail Icon at http://www.analog-innovations.com |    1962     | 
              
I love to cook with wine.     Sometimes I even put it in the food.

Maybe use a toroid, Teflon winding on the HV side, use left qtr for pri, right qtr for sec, dip in Glyptal?

Customer built a PCB and is getting good data coupling out to 2" spacing.

Both ends are tuned with Q~10, so I'm going to cut it back a bit, I fear cross-talk issues when he implements multi-channels. ...Jim Thompson

--
| James E.Thompson                                 |    mens     | 
| Analog Innovations                               |     et      | 
| Analog/Mixed-Signal ASIC's and Discrete Systems  |    manus    | 
| San Tan Valley, AZ 85142     Skype: skypeanalog  |             | 
| Voice:(480)460-2350  Fax: Available upon request |  Brass Rat  | 
| E-mail Icon at http://www.analog-innovations.com |    1962     | 
              
I love to cook with wine.     Sometimes I even put it in the food.

Can he put alternate channels on the opposite side of the board? Or maybe a EMI shielding enclosure, might cause a change in the inductance of the coil a bit.

Cheers

Customer has 1' PCB panels... Single inputs on N and W sides, outputs on E and S sides. ...Jim Thompson

--
| James E.Thompson                                 |    mens     | 
| Analog Innovations                               |     et      | 
| Analog/Mixed-Signal ASIC's and Discrete Systems  |    manus    | 
| San Tan Valley, AZ 85142     Skype: skypeanalog  |             | 
| Voice:(480)460-2350  Fax: Available upon request |  Brass Rat  | 
| E-mail Icon at http://www.analog-innovations.com |    1962     | 
              
I love to cook with wine.     Sometimes I even put it in the food.

Sheet of mu metal placed at 45 degrees? Stuff is rather good even at 60Hz and would get better as frequency goes up. Tie sheet to system ground plane, natch.

I've seen FM radios with a small single wall shield next to inductors to break up the field. As long as the inductors are mounted 90deg from one another coupling is at a minimum. I vaguely recall coils are needed, so toroids are out of the question.

Cheers

...Jim Thompson

--
| James E.Thompson                                 |    mens     | 
| Analog Innovations                               |     et      | 
| Analog/Mixed-Signal ASIC's and Discrete Systems  |    manus    | 
| San Tan Valley, AZ 85142     Skype: skypeanalog  |             | 
| Voice:(480)460-2350  Fax: Available upon request |  Brass Rat  | 
| E-mail Icon at http://www.analog-innovations.com |    1962     | 
              
I love to cook with wine.     Sometimes I even put it in the food.

Check; from the description of input , output coils,it would seem that parallel orientation would be the case..

out / * *

Oh I see now. Spooled inductors are wonderful emitters. Yep a lower Q and I'd imagine separate TX and rx frequencies. I believe there is specific EMI limits for intentional emitters if he eventually goes for some type of certification. It could be either be bad or good ;)

Cheers

below 10kHz don't care. OSHA cares about exposure,but that's more safety and is HUGE.

In the US, below 150kHz FCC doesn't really care. BUT, in Europe they care. comes from the Netherlands [I believe] and their [or someone's] submarine communications channels.

Above 150kHz is not necessary, but we once had an Engineer unnessarily select 8MHz [From memory] to transmit 1W, and that was a huge bother. marginal, at the NRTL, not to mention trying to meet the SAR limits, which it exceeded/failed.

BELOW, not above!!!

ARRRGGG!!! English is my first language, it doesn't show very often! When I read my reply, *I* even misread it and posted a previous, stupid reply.

means it is NOT necessary to go above 150kHz AND you get into that 'regulatory' quagmire ubove 150kHz.