LIST MO:AY= Sifopr At Late of Cigna. Forloi Tizzt &tonazd Allot=nt tun of Authorization Coveroa To 74117.1ber 4-4.4aation__ _ ,..� - .,..-........ Au, ,y1.� ��,,, Aadit1on.s1 PerW rAto ... --- -. __. Olisaton Authorisations Covarea TO Viu_IN.--,,r h i _-__--- --- Invoice icina,),-,1A- Bete / Pocu at Awunt of Deaegoz . Purpose: To support, in part, a atudy tbe computer analysis of bieelectrle response patterns ()01.1%1 129). Initiated: June 1961 Contractor Coat: $2505.33 Status: ComMencIng. 2 A February _1963- 2 -.ocr upplies nez. $1,000.03 1 derma/Ise ter,- Y o p&ir.ga Instrument's Co 1119016 to4---am ,evitching tubes 4 beadayoards, Burrogbs Corp. _ 190.99 bare Nnd connectors, GrnyVar-telectria Co. 1 cbair foe experimental subject, Hecht Coe t 3 cabinet, Oix.n's 1 pulse .triumformer,-treed Transformer Co. diodes, resistors, alc,ctronic Wholesalers, Inc. capacitors, diodes, Capitol Midi� Who1e3a1ers, inc. tubing, resistora,_Certifled-Electronics, In, Ira Part -Nos 101(.671 dust control for magnetic tape unit Total 0:7 21.09 09.95 54.77 19.10 94.6a II 77.55 6.32 _ 7.30 45.0Ce Pa icipantst ruarY_, at is the atiori-littbe data prooas-witig Ptychophysiologic avior. e SETAR tomatic, nation._ of-clectronic Analysis o siologic response Utta PICOgrW4a for paychophysiologic data. Analog-to-digital onves on_ or ing_o_ iat u taneous data cbannels_in_digital_comiute _format directly from the human-subjecti Since.our research may be of_interest-_to you, we would prectate having such furthcr support frOm-youli-as=you deemH in**ropriste.. \ Sincerely rs, ? - c a bnayi5,- Your grant-hel d to supot the fel lowi ng apes and publications' apttICAnOM An-1214 1620 prQgbncr op_of_psychophysiologic PAPEaS At-PikorvssIola4716=022-_ _ November 17, 1961 letter explains the enclosure. After reading it, I would agree that it does "conform to the best current thinking on skin conductance." This is my only copy. We'll send journal reprints when_avallable_Mwnwhile, this bit may help some of youupe)ple who are thinking along similar lines. Enclosure Enclosed Las copy of a paper we are submitting for journal publication. This equipment was_developed by us since-a -- suitable instrument was not available commercially, - It incorporateathe characteristics which we find most desirable_for_our system, and conforms to the best current thinking on Skin conductance. Hope to see-you soon. Best Wiabes from ng, ltgh.accuracy Skin Conduct !Its Transducer for Digital Convers4on1 This instrument is arranged for analog-to-digital conversion and subsequent recording on magnetic taps, and was specifically designed for this application. However, it can be applied with aNiaristy of readout devices. The instrument -described here incorporates several basic characteristics, . (1) overcomeaLthe_polarization effect at the electrodes by a continuous reversal of the direction of current flowing - through the wubject,2 (2) an absolute value circuit nullifies anyieffect which currentfreversal might -have on the output (3) covers the total range of the subject't.resistanc 0-400K as-a-single channel voltage output, (4) a bigh:resolutien which permits discrimination of changes as mall as one part in 2,000. In practice, the -resolving power of this -instrument is limited by the readout-device-coupled to iWOUtput. In its, Present application 1e This study wap_supported*-th� 7.34 this,is one part in_2�04 of the resistance riling. covered, which represents the maximum capability of an *lei-fen-bit binary analog-t digital converter with a plus ox minus 10 volts input. _ PRINCIPLE Of OPERATION This unit utilizes the constant current feedbackicircuit of an operational amplifierite_deterrine_the_skin_conductance_of a subject. The FR drop across a_sUbjett is calculated by a differential _amplifier which algebraically adds the voltage at one side of tbs subject to the inverted voltage at the other _side. A nultivibrator_currentrswitching circuit is used to reverse the current flow throughLthe_sUbject, thus preventing electrode polarization. Due to the current_reversal_through_the_sUbjectl! an, absolute value circuit is added_to_keep the outpnt of the differential amplifier positive at all times. The electwodes used with_thiivinstrument_aretwo zinc-zinc sulfat. electrodes, 2 cm. in diameter, and mounted in lutite_cups, and are attached to the vole: surface of the subject's left metacarpusTand-forearm. The output voltage of the absol-Ute value circuits_when_divided into the constant subject current (50ua), equals the Subject's conductances The subject current, which remains constant after being adjusted, is 50ua. This current-results in an outpnt voltage between 0 to 20 volts for resistance readings of less than 400,000 ohms. Each amplifier has a shorting switch and balance circuit in its input, A front panel switch and meter ore available to read the outputs of each ampli equipment� Precision resistors (tX) of 100,000 aloe, 50,000 ohms, 25,000 ohms. _ 10,000 ohms, 5,000 ohms, and 20500 ohMs may 'be_ switched into the fesdback circuit of the constant_current amplifier when calibrstion is desired. APPARATUS Constent Current Amplifier. The constant current �amplifier consists of a Philbrick M2-W-operatiOnal_amplifier, a Philbrick_X2-11 stabiliting amplifier, and associated feedback and input resistors If it is not desirable to have aTchopped VC current at 60 pulseovpersecond through-the Philbrick X2-P may be replaced with standard biesingiresistors. Great care must then bkeXercised inisalancing this circuit. The input oircuit_voltege divider uses a 10,000 ohtt POteutiometer to set the current fl�Wothresugh a 2700000 ohm input resietor. If the current flow through this resistor is set at 400a, then tWfeedback current flow through the 250,000_oh1 feedback resistor, which connects to the summing point of the amplifier, will also be 40ua. This is due to the feedback characteristics of_the_operational-amplifier. Forty microamperes flowing through a 250,000 ohm resistor will cause a ten volt potential to be present at the one megohm input resistor of tho inverter portion of the differential amplifier. Ten volts dropped across a one megohm.resistor produces current flow of ten ua. The Combination of the 40ua current and the ten ua current both flow through the subject. With the subject resistance at less than 400,000 ohne, the cur nt-flow through the eel:Oct is 50ua at all times. The isput voltage to the second half of the differential amplifier is then 50(ua) times the subject resistance plus ten volts. Assume the:subject_resiiiitance to bo 100,000'4:km5. T voltage_on the input side of-the_tubject_will_be ten volts.; The_voltag0-94_0*___ output side of the_eubject will be 5x10 or 5 volte. M 1 ivib times lx10 This circuit consists of a Philbrick X2-14 or rational amplifier, a 6AL5 dual.Aiode d associated capacitors-and:resisters. The X.2-W is wired ae_a_typical multivibrator circuit 'with charge capacitors of 4mf, 0.4mfl_0,2sf, and 0.1mf, wired to _a front panel owitch. Th se capaeitors_cause_the K2-14 output te-go-positive and then neeative at a rate of 0.). cps, 'cps, 2cps or 4 cycles per second respectively, d pending on the switch position, �A positive or negative going external synchronising signal may be imposed upon the multivibrator through a fitting connected to the input grid. When the output of _the multivibrator_coos_positive, plAto_2_of the 6A/5 diode switch goes positive. This effectively causes a positive potential on the cathode of both_diodes. Plate 1 of the GALS has no current flow_at_this_tiMe_because ite associated cathode i positive when the_multivibrator_swings_negative, plate 2 of the died becomes negative and thud cuts off, Cathodes 1 and 2 become neeative due to the 300 volt voltage-divider network in thie_circuit. Current then flows from cathode 2 to plate 2, down through two 270,000 am reeistors, and a 100,000 ohs* balance potentiometer to -ground. A negative potential is established at the junction oZ the 270,000 ohm diode plate resistor and the 270,000 am resistor which is conncctccl to the balance potentiometer. This negative potentisa counteracts the positive potential at the summing point of the constant current amplifier and produces an algebraio_sum of equal but opposite voltage. The cUrrent flaw through the subject is then 50ua in the reverse direction. Different4al Amoiexo, The-two-41E4)g* differential _amplifier consists of two Philbriek K2-W operational amplifiers, two Philbriek X2-P stabilizing amplifiers, and associated feedbackand_input resistors. The X2-P chopper _amplifiers are requisite to obtaining the desired accuracy and resolution. Each ampltfier has an amplification fattor of ones Eout Rf_ x Bin. The ten volts present-at-the_input side Rin of the subject areinverted_through the first ofIthese_amplifiers and introduced at one masking input resistors'of the second amplifier. The voltage developed on the output side of the subject is fed to the other summing input resistor. The _output of thcsecond_amplifier goes negative and poeitive as the current is reversedAhrough_the_subject, and has a voltageiyalue_representing the algebraic_diffcrence between the two input voltages, EOUt L. X El + L x82. RinRj, The output voltage o the differenti 1 amplifier has a range of -20 to +20 volt*. Absolutialue,_,Wmat The absolute value circuit keeps the output positive at all:times. This circuit consists of two Philbrick X2.41 - operational amplifiers, two Philbrick K2-P stabilizing amplifiers, a 6AL5 a-1N3ah diode, and associated resistors an4-eapaeieors, is applied through a 250,000 ohm input zee or and the equal eget ve voltage from the firet_helf of the theolute valuecircuit_emPlificr is applied through a-125,000 ohm input vosistor, :The resulting outpu from the second amplifier As a positive voltage equal to the positive output of the differential amplifier, Tbe plus or minus 20 volts output of the differential_ampl or are applied to the 250,000 ohm input reaistors Of: both &Wine which make up the Absolute value_eircuit. If the output la negative, the output of the operational_amplifier with-the 41AL3 switching diode in its feedback circuit_goes positive to the same value. The cathode of the output diode is_then positive and cuts Off .11 The same positive_output is also applied through a 50-,000 ohm resistor to the plate of the feedback diode causing_it_to_condUCt, and thuo reduce_the_summing point of the amplifier to_sezo volts. The 125,000 oh input-resistor to the second operational amplifier iii kept at ground level by the 11138A-to ground. With a feedback resistor250,000 ohms in_the_second_amplifier, it gives an output of some positive voltage equal to the negative_input. The resistance-of the subject can be celculated_by the formula R 50ua xBout,. This_iivonly true if_the final amplifier feedback resistance is 250;000 Ohms. If this value is doubled, the voltageoutput - must be divided by_two, or if halved, multiplied by two etc. If the output of-the differential amplifier goes-positive, the output of the first amplifier_goes negative and the cathode of_the output diode goes -negative. This negative voltage is applied to the 125,000 ohm input resistor of_the second amplifier as-the diode plate draws current. The neeative voltage on_the plate of_thei_feedback diode cots it off and only the 250,000 ohei feedback resistor is in the circuit. This causes an amplification of one through .the first ampli The input to the second_amplifitrA.s_then_composed of teo-deual bUt opposite voltages, The positive output of tbe differential amplifier � Cost Ac AN?, .11510.02 Object Class Date Remarks and References Obligations Incurred Obligations Liquidated Balance 11 iJULi _ SAC. � Jj (When Filled In) Aftil 104.0.21tW3l TS1 Ca174147-M-.1 ATWITT011 : Fiaance D1i1t- SABOT EMMA; Slibl)rbjeet _ Under the authority greAted-in the mg,- rardun date1-13-ApItil 1953 rmA the XI to the PEVA, auA the exte.mion of th13-authcprity sesapent. aeuoranda: 3ubproject-104/ ha 3 Intru elligeoveat of" the ovar-all Project ttiNULOA rurtda bavebeo-A_obliseted to cover the aubproje .1"'s expellos enfl 1i b- J7,t1,3t oonter - lut-kaa-A- Y3a , _ PITACTA0 Pat kNON -- C7 t� .n.10cIA Date: 77" Disti*Dutin: Orig. ts 2 tesjixeoae TSD/PASS WORD I CERTIFY THAT FUNDS ARE AY-ARABLE( OGAT!IREF(P,a4CE op,":" _ii PWGri, )0 acLorrea41 Ns. _ goimmamywiw AUTHOR.ZING OFFICE (When Filled In) . CONFIDENTIAL FUNDS POSTING VOUCHER I VOUCHER NO. 7-12 DATE 2-6 8 l'-'v VOUCHER NO. 7-12 1 1 DESCRIPTION ALL OTHER ACCOUNTS 13.33 34.39 STATION CODE PROP. NO. 40-42 EXPEND CODE U N 0 45.4 PAY PER L10. CODE 47.52 �BLOC. REF. NO. ptmi.c.. % .'........ i�. 00. 53 54.57 GENERAL 58-67 ALLOT. OR COST ACCT. NO. 68-70 DUE DATE 71.eo AMOUNT DESCRIPTION. ADVANCE ACCOUNTS 13.27 p.o. No. 0,v CA YR LEDGER ACCT. NO. 82.67 Cg.No, *-1"--- X REF. NO. OBJECT CLASS DEBIT CREDIT PROJECT NO. . Y ' r � � � � 1 � � � 0 i /es- Apie 0.i.... � ,,,, , , .... 0 � . � 0 � � � 0 0 � � . II � . ...... � 0 � 0 0 � � 1 II � � � 0 0 � 4 II .1 . . I. . . 0 : � 0 0 0 0 � . 0 .. 0 ... . .1 0 II � . 0 4 . 1 � � .. . . . . 0 4 0 � 0 0 � 0 . 0 . � � 1 .. 0 � : I 0 � 0 . 0 I . . 0 0 � 0 .. 0 . .. � � . EXPLANATION OF ENTRY TOT LS ..6.--eZe.....e. , , , ATE � .1.0.- i P EPAR ATE REVIEWED BY 1 CERTIIW FOR PAYIENI OR CREDIT I I DATE S GNATUR� OF CERTIFYING h 1 [ OFF, E FORM I 0- 59 606 US PREVIOUS E (110.01S st Account Object Class Class Date Remarks and References Obligations � Obligations Incurred Liquidated it0109. Unliquidated Balance MEMORANDUM FOR: Chief, riii1t1441 MANI VIA t Ti5a/Budget Officer 10113.04T MICULTRA, SUbprojet 1249invoica No. -1, Allcitment No. 11254390443902 1. Lavoie* No. 1 is attached covering the above subproject. Payment should be made as follows: hoTcic-iii the amount of 250 payable' to �; The check�Should be forwarded to Chief, _TS1Y/Research aranch, through TS1)/BUdget-Mter, no later than 17 July 1961. 1. 11117Th-a final invoice. Howeveri since-it is anticipated that additional funds Will 54T-obligated for this project the files - should not_be closed.. Attached: Invoice IC Certification Distribution: � - - � - sek.:).) .Orig �k 2 .4- Addressee � C.H_E-00 �./V.4: t -1-::;-t�,:-.A,,, i21\11. 0 t0A ...., -;:i MEMCMAXDUM AMMON SOWSZT 12.g a toter 1960 i_COPTMOLIAR 1- Intone* NAACO PRIMA, tabprojoot 129 'Mar tbo snthority grentod In tho nostorenduagated, 13 April 3953 froa the DOI to the VOA, and the extenelon OS this authority in subsequent nonorondas subproNt 3.29 Ms boon approvod ani $20,000 of tho ovor.411DUIWRA projeot funds has been obligated to cover the subprojeot's 'nooses* ;11212 obligation of rondo sNmAdto charged to Allotnontu234.occe APPROVXD 104-OBLIOATIOW OF FUNDS$ _ Dot*: Vi�k) i ,c[RT:y THAT rut,171�5. AJ,E AVAILAS!E, . 1.&;�,i'.

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MKULTRA SUBPROJECT 129 (24 DOCUMENTS WITH PUBDATES FROM 601019 TO 63020 5)