MKULTRA SUBPROJECT 129 (24 DOCUMENTS WITH PUBDATES FROM 601019 TO 63020 5)
Document Type:
Keywords:
Collection:
Document Number (FOIA) /ESDN (CREST):
00017387
Release Decision:
RIPPUB
Original Classification:
U
Document Page Count:
50
Document Creation Date:
August 23, 2024
Document Release Date:
September 8, 1976
Sequence Number:
Case Number:
Publication Date:
October 19, 1960
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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 --
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Date:
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Disti*Dutin:
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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
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DESCRIPTION ALL OTHER ACCOUNTS 13.33
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40-42
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ADVANCE ACCOUNTS 13.27
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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
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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'.