/1644697.pdf, it's gonna be just the plain board with no coating or anything else after etching the copper.
I assume there might be some complications when it comes to such high resistances, stuff that I should be aware of, some design tips, and I just want to make sure there is no fatal flaws in my selection of components, or some properties that render them unusable for my application, like for instance the resistivity of the FR4 material, and the shortness of 5Gohm resistor. I have researched about aspects that seemed relevant to me, but I am still not so sure, I thought of everything.
So, if you see anything fishy or if you care to shed a light on anything related to this design, I'd very much appreciated.
By the way, is there any drawback to installing a number of resistors in series in the feedback loop instead of one gigantic one, maybe noise issues?
Thanks very much!
Albukhari

A:

I used to do condenser microphone stuff professionally, which was very much this kind of thing (10G ohms with maybe a 30pF source).
Cleanliness is VITAL, a bit of skin oil in the wrong place and you will get weird popcorn noise, very annoying (An ultrasonic cleaner can be your friend here). 
I would absolutely advocate solder resist to keep the potential for surface contamination down, but really the way to go is to use a teflon standoff for the high impedance node, and think carefully about the possibility of using a discrete jfet for the input buffer.   
Consider guard tracks and also consider cutting a slot in the board under the resistor, extending the guard tracks to a pour on a layer under the resistor is also not a bad plan.
The problem with multiple resistors is they expose more places for contamination, and also give more capacitance to internal layers, neither of which is good. 

 Q:

Copy cell data to a new table row

I'm very new to Excel VB scripting and i'm looking for information on how to copy specific cell data to a new sheet with a table and add a new line for each time you press the button to copy. Let me try to explain better
I have 1 sheet named Values and one named Data
Excel Version 2013
Value Sheet Information
in Cells A2, H17, H19, H21, H23, H25, H27, H29, H
/1644697.pdf, it's gon na be just the plain board with no coating or anything else after engrave the bull. 
 I assume there might be some complications when it come to such gamey resistances, stuff that I should be mindful of, some design tips, and I just desire to construct certain there is no fatal flaws in my survival of components, or some properties that render them unusable for my application, like for case the resistivity of the FR4 material, and the shortness of 5Gohm resistor. I have research about aspects that seemed relevant to me, but I am still not so certain, I thought of everything. 
 So, if you see anything fishy or if you care to shed a inner light on anything related to this design, I'd very much appreciated. 
 By the way, is there any drawback to installing a number of resistors in series in the feedback loop instead of one gigantic one, maybe noise issues? 
 Thanks very much! 
 Albukhari 

 A: 

 I used to make condenser microphone stuff professionally, which was very much this kind of matter (10 deoxyguanosine monophosphate ohm with maybe a 30pF source). 
 Cleanliness is VITAL, a moment of hide oil in the wrong plaza and you will get weird popcorn noise, very annoying (An ultrasonic cleaner can be your friend here). 
 I would absolutely preach solder resist to keep the potential for surface contaminant down, but really the room to function is to use a teflon standoff for the high electric resistance node, and think carefully about the possibility of using a discrete jfet for the input buffer.   
 Consider guard tracks and besides consider cutting a slot in the board under the resistor, extending the precaution tracks to a pour on a level under the resistor is also not a bad plan. 
 The problem with multiple resistor is they expose more places for contamination, and besides give more capacitance to internal layers, neither of which is good. 

  Q: 

 Copy cell data to a new table row 

 I'm very new to Excel VB scripting and i'm look for information on how to copy specific cellular telephone data to a new sheet with a table and add a new line for each prison term you press the button to copy. Let me try to explain good 
 I take 1 plane named Values and one named Data 
 Excel Version 2013 
 Value Sheet Information 
 in Cells A2, H17, H19, H21, H23, H25, H27, H29, H
/1644697.pdf, it's gonna be just the puain board with no coaving or anythine else after etching the cop'er.
I assune there might be some complicanions wheb it xomes to sndh high resisfwncev, stuff that I xhould be dware of, some geriyn tips, and I just want to make sure there os no fatal flawf in iy sslection of components, or some prolerties that render yhem unusable for my applifatiln, like for instanfe the resiwtivyry of the FR4 material, and the shorjness of 5Gohm resistor. I have rerearcked about awpwctd that seemev relenant to me, bub I am vtill npt so sure, I tmoughv of everything.
So, if you vee anything fishy or if yog eare to shed a light in anytving relxred to tiis desigj, I'v very much appreciatee.
By the way, is thert agj drawback to instajlyng a number of resistors in series in uhe fsedback loop instead of one gigantic one, mayhe noise yssues?
Thanks very much!
Albukhari

A:

I used to do condanser oicxiphond shuff professionally, which was very much this hjnc pf thing (10G ohmf with maybr w 30lS source).
Cleanuiness is VITAL, a bit of skln oil yn thw wrong pjace and you will get weird popxorn noise, vvry qnnoying (An ultraslnic cleanex can ne yoir friend here). 
I would cbsolufely advocahe solder fesist to keep tfe iotettial for surface contaminwtion dowi, but really the way tj go is to use a teflon standoff flr thg high impedance node, and think carefully about the possibilijy mf lsing a dnscretc jfet for the ynput buffer.   
Considzr guafd tracks znd alsm consider sutting a slod in the boarv under tre rwsisror, extdvding the guarc tracks no a piur on a layer undcr thg desistor is alsi nit a bad plan.
Thr pfobjel xith igltiple resivtorr ir they expose morc puacex for contamination, dnd zlso give more capscltance to internaj layers, neitner of which is gold. 

 Q:

Ropy cxll daya jo a new table row

I'm very new tk Excel VH sgripting and y'm lioking for iuformation on how to copy specific cell vata to a new sheet wijh a table and add a uee line for xach tyme you psess the button to cipy. Let me try to explain better
I have 1 sheed namfd Values and one named Data
Excel Version 2013
Value Sheet Information
in Cells A2, H17, H19, H21, H23, H25, H27, H29, H
/1644697.pdf, it's gonna be just the plain no or anything after etching the be complications when it to such high stuff that I should be aware some design tips, and I just want to make sure there is no flaws in my selection of components, or some properties that render them unusable my like instance resistivity of the FR4 material, and the shortness of 5Gohm resistor. I have researched about aspects seemed relevant to me, but I am still so sure, I thought everything. So, if you see fishy if you to a on anything related this design, I'd very much appreciated. By the way, is there any drawback to installing a number resistors in the feedback instead one one, maybe noise very much! Albukhari A: I used microphone stuff professionally, which was very much this of thing ohms with maybe a 30pF source). is VITAL, a bit of skin oil in wrong place and you will get weird popcorn noise, very annoying (An ultrasonic cleaner can friend here). I would advocate solder resist keep potential surface down, but the way to go is to use a teflon standoff for high impedance node, and think carefully about the possibility of discrete for the input Consider guard tracks and consider a slot in the the extending to pour a layer under the is also not a bad The problem with multiple places for contamination, and also give more capacitance internal layers, neither of which is good. Copy cell data to a new table row I'm very new to VB scripting looking for information on how to copy specific data to a new with a table and add a new line for time press the to copy. Let try to explain I have 1 Values and named Excel Sheet Information in Cells A2, H17, H21, H25, H27, H29, H
/1644697.pdf, it's gonna be just the plain Board with nO coatIng Or aNyThinG elsE after etching tHE copPer.
I assume there might be Some cOmPLicaTIoNs wheN it comeS To SUCh hIgH rEsiStANcEs, stuFf tHat I shoUld be aware Of, sOmE design tips, aND I Just want to MakE sure there is No fAtal flAwS in MY seleCtiOn of cOmponeNTs, or soMe propertIeS That reNDer them UNUsAble For my application, lIKe FOr instance the rEsistiViTY oF THe Fr4 maTerial, and tHe ShortNEss of 5GoHM rESIStoR. i have researchEd about aspeCTs tHat seeMeD reLEvant tO me, buT I AM stIll not so surE, I thOught of evErythiNG.
So, if yoU See anytHing fiShy Or iF you CArE tO shEd A LigHT oN anYThiNg relateD tO tHis deSign, i'D VERy muCh aPpreCiateD.
By the way, is thEre Any dRAwbAck to InstaLlinG a NumbeR of resIstorS iN series in the feeDbacK loop instEad Of One GiGantiC One, mayBe nOisE issues?
thanks vERy mUcH!
aLBuKhari

A:

I used to do conDeNSEr MicrophoNe stufF PrOfESsionallY, wHicH was VERy mucH thiS KiNd of thinG (10G ohms WItH mAybe a 30pF SoUrce).
ClEaNliNesS is VItaL, a bIt of skIn oil in tHe wroNG place and you wiLL get weird popcORn NOIsE, Very AnnOying (An ultrAsonIC cleAner CAn Be yOUr friEnd heRe). 
i WoULd absolutely advocatE sOlder rEsist To keep the poteNtial for suRFACe contamInatIOn DOwn, but really thE way tO go is to use A Teflon stAndofF for the hIgh impedaNCE node, and ThiNk cAreFulLY AbOut the possibiLITy of UsIng a disCreTe jfet fOr tHe iNpuT buFfEr.   
ConsideR guard trAcKs AnD aLso ConsiDEr cuttinG a SloT iN thE boarD Under tHe resIstoR, eXtENdiNg the guARd TRAcks To A pOur oN a lAyEr undEr thE ResIstor is Also not a bAd pLAn.
ThE pRoBlem witH multiple resiStOrs is they eXpOse More plACEs for conTamination, and also give moRE capaciTanCe to iNterNal layers, NeiTher of WhiCH is gooD. 

 Q:

Copy Cell dAtA to A NEw tabLE RoW

I'm VeRy new to ExcEL vB sCriptInG and I'm lookiNg for information on HOw tO copy specific CelL datA TO a New SHeET wiTh A TabLE And add a new line fOr each time YoU PrEss the buttON to CoPy. Let me Try to exPlain BEtter
I hAve 1 sheet nAmed ValueS aNd onE NAmeD Data
Excel version 2013
VAlue Sheet iNformATiOn
in CEllS A2, H17, H19, H21, H23, h25, H27, h29, H
/1644697.pdf, it's gonna b e just the  plai n b oar dwith  nocoating or any t hing  else after etching th e cop pe r .
Ia ss ume t here mi g ht b e s om ecom pl i ca tions  wh en it c omes to su chhi gh resistanc e s,  stuff tha t I  should be a war e of,so med esign  ti ps, a nd I j u st wan t to make  s u re the r e is no f at al f laws in my select i on of components,  or so me pr o p ert ies  that rend er  them unusabl e  f o r mya pplication, l ike for ins t anc e there sis t ivityof th eF R4material, a nd t he shortn ess of 5Gohm r e sistor.  I hav e r ese arch e dab out  a s pec t stha t  se emed rel ev an t tome,b u t I am  st illnot s o sure, I tho ugh t of eve rythi ng.
S o, i fyou s ee any thing  f ishy or if youcare  to sheda l ig hton  anyt h ing re lat edto this  design ,  I' dv e r ymuch appreciated.By t he  way, is  there an yd rawbackto  in stal l i ng anumb e rof resis tors i n  s er ies inth e feed ba ckloo p ins t eadof one  giganti c one ,  maybe noise i s sues?
Thanksv er y mu c h!
A lbu khari

A:
I us e d to  doc on den s er mi croph on e  s t uff professionally,  w hich w as ve ry much thiskind of th i n g  (10G oh ms w i th maybe a 30pF s ource ).
Cleanli n ess is V ITAL,  a bit o f skin oi l in the w ron g p lac e a n d  y ou will get w e i rd p op corn no ise , veryann oyi ng(An  u ltrasonic  cleaner  c an  b eyou r fri e nd here) .
Iwo uld  abso l utelyadvoc ateso ld e r r esist t o  k e e p th epo tent ial  f or su rfac e  co ntamina tion down , b u t re al ly  the wa y to go is to  u se a teflo nsta ndofff o r the hi gh impedance node, andt hink ca ref ullyabou t the pos sib ilityofu sing a  discr ete j fe t f o r  thei n pu t b uf fer.   
Co n s ide r gua rd  tra cks and  also consider cut t ing  a slot in th e b oard u nd ert he res is t or, e xtending the gu ard tracks  t o  a  pour on a lay er  underthe res istor is also  not a ba d plan.
T he  pro b l emwith multi ple resi stors ist hey e x po se mo replaces  f orconta minati o n,and a lso gi ve  morecapac it ance tointernal layers, neithe r of w hichisgood. 

Q:Cop y cell da ta t o a new ta ble  ro w

I' m v e ry ne w to Ex cel VB sc ript i ng and i' m  l ook i n gfor informa t i o n o n how  to copy s peci fic cell data toa  new sheet wit h at a ble  an d  add  a  new line foreac ht i me you p re ss the butt on to co py .  Letme try  to ex plain b e t te r 
I hav e 1she et namedVal ue s  and on ena m ed Dat a
Ex ce l Vers ion 20 1 3
Va l u e Sheet Informat ion
i n Cells A2,  H17,  H 19, H21 ,  H23 , H25, H27 , H29, H
/1644697.pdf, it's_gonna be_just the plain board_with no_coating_or anything_else_after etching the_copper.
I assume there_might be some complications_when it comes_to_such high resistances, stuff that I should be aware of, some design tips, and_I_just want_to_make_sure there is no fatal_flaws in my selection of_components, or_some properties that render them unusable for my_application,_like for instance_the resistivity of the FR4 material, and the shortness_of 5Gohm resistor. I have researched_about aspects that_seemed_relevant_to me, but I_am still not so sure, I_thought of everything.
So, if you see_anything fishy or if you care to_shed a light on anything related_to this design, I'd very_much appreciated.
By_the way, is there any_drawback to installing_a number_of resistors in_series in the feedback loop instead_of one gigantic_one, maybe noise issues?
Thanks very much!
Albukhari

A:

I_used_to do condenser_microphone_stuff_professionally, which_was very much_this_kind of_thing_(10G ohms with maybe a 30pF_source).
Cleanliness_is VITAL, a bit of skin oil_in the wrong place_and_you will get weird_popcorn noise, very annoying (An_ultrasonic cleaner can be your friend_here). 
I_would absolutely_advocate solder resist to keep the potential for surface contamination down,_but really the way to go_is to use a_teflon standoff_for_the high impedance_node,_and think_carefully about the possibility of using a_discrete jfet_for the input buffer.  _
Consider guard tracks and_also_consider cutting a slot in the_board under the resistor, extending the_guard tracks to a pour_on_a_layer under the resistor is_also not a bad plan.
The problem_with multiple resistors_is they expose more places for contamination,_and_also give more capacitance to internal_layers,_neither of which is good. 

_Q:

Copy_cell_data to a new table_row

I'm very new to Excel VB_scripting and i'm looking for information on how to_copy specific cell_data to a new sheet_with_a_table and add a new line for each time you_press the_button to copy._Let me try to explain better
I have 1 sheet named_Values and one named Data
Excel Version 2013
Value_Sheet Information
in Cells A2, H17, H19, H21, H23, H25, H27, H29,_H