PROPOSAL TO DESIGN AND FABRICATE CURSOR GENERATING CIRCUITRY

• Document Type: FOIA
• Collection: FOIA Collection
• Document Number (FOIA) /ESDN (CREST): 05752558
• Release Decision: RIFPUB
• Original Classification: U
• Document Page Count: 24
• Document Creation Date: March 9, 2023
• Document Release Date: February 10, 2021
• Case Number: F-2011-01575
• Publication Date: May 9, 1966

A
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Addendum 4 to
Proposal No. C126-CP65
Dated 9 May 1966
Electronic and Optical
Systems Department
6 k
PROPOSAL TO DESIGN AND FABRICATE
CURSOR GENERATING CIRCUITRY (U)
TEXAS IN ST RUM ENTS
INCORPORATED
CON P�"'iTIAL
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TABLE OF CONTENTS
Section Title Page
I. INTRODUCTION 1
TECHNICAL DESCRIPTION 1
PROGRAM SCHEDULE 5
,
ii
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TEXAS INSTRUMENTS INCORPORATED
Apparatus Division
13500 North Central Expressway
Post Office Box 6015
Dallas, Texas 75222
PROPOSAL TO DESIGN AND FABRICATE
CURSOR GENERATING CIRCUITRY (U)
Addendum 4 to Proposal No.
C126-CP65
9 May 1966
SECTION I
INTRODUCTION
_
Texas Instruments proposes to design and fabricate certain
cursor generating circuitry for the FLIR system now under contract
in order to provide proper interface with prospective airframe
contractors and in order for the FLIR to be integrated properly
into the total avionics system.
SECTION II
TECHNICAL DESCRIPTION
Four cursors are required for integrating the Forward Looking
Infrared (FLIR) subsystem into the avionics system. They are
as follows:
1. Fixed Elevation Boresight.
2. Vertical cursor displaced from centerline
by a computed amount.
3. Two indexing marks at top and bottom dis-
placed from centerline by a computed amount.
-r
1
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4. Horizontal cursor displaced from center
downward by a computed amount.
The cursors described above will be generated electronically
and displayed on the face of the crt as bright lines. Figure 1
shows the proposed format on the display.
The fixed elevation boresight cursor is generated by adding
a 15-VDC level to the vertical sweep waveform. This new form
fires a Schmitt trigger circuit. The output of the Schmitt
trigger is shaped by a monostable multivibrator to give a
controlled-short pulse. This pulse, when added to video,
yields the fixed horizontal line. Figure 2A shows the block
diagram of this proposed circuit. The vertical sweep waveform
has a peak voltage of 30-VDC which represents the extreme lower
limit of the display format. The addition of the dc-level would
intersect the sawtooth at 15-volts which would center the
horizontal boresight line on the display. The monostable-
multivibrator output is a square wave. The width of this square
wave is adjusted to illuminate one horizontal-scan line.
The vertical cursor is generated by. adding a variable dc-level
to the horizontal-sweep trigger waveforms. Again, the resultant
waveform fires a Schmitt trigger. Since the vertical line is
a. series of dots, thi-Outykit added to video must be very short
pulses. The pulses, or spikes,. are obtained by differentiating
the output of the Schmitt trigger.
Position of the vertical cursor is determined by the variable-
dc-voltage level which operates on the horizontal sweep saw-
tooth wave. Peak voltage of the horizontal sweep is 15-VDC.
Figure 2B shows the block diagram of the circuitry required.
Two indexing marks are generated by adding two fixed dc-levels
to the vertical-sweep waveform. The two separate outputs each
firea Schmitt trigger. . This output is then shaped by a multi-
vibrator. The two, short square-waves obtained from the multi-
vibrator trigger a gate circuit which allows a series of pulses
to pass to the video. These pulses generate a short, vertical
line at the top and bottom of the display. The gated pulses
are obtained similarly to pulses which generate the vertical
cursor. They require a variable dc-level which determines the
horizontal location of the indexing marks.
2
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VARIABLE POSITION
VERTICAL CURSOR
VARIABLE POSITION
INDEXING MARKS
VARIABLE POSITION
HORIZONTAL CURSOR
FIGURE 1.
FIXED HORIZONTAL
BORESIGHT CURSOR
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�
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�
15 VDC
VERTICAL
SWEEP
0-15 VDC
SCHMITT
TRIGGER
SCHMITT
TRIGGER
MONO-
STABLE
MULTI-
VIBRATOR
DIFFER-
ENTIATOR
TO VIDEO �
1AAJLA_
TO VIDEO
HORIZONTAL
SWEEP
15-30 VDC
SCHMITT
MONO-
STABLE
_J L_
TRIGGER
MULTI-
VIBRATOR
TO VIDEO
VERTICAL
SWEEP
FIGURE 2.
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,
The two, fixed dc-voltages are chosen to locate the indexing
marks vertically. An input of 2-VDC will fix the top index
while the 28-VDC input will locate the bottom index. Width of
the square-waves out of the multivibrators is adjustable and
determines how many pulses pass to video and therefore control
the vertical length of the indices. Figure 3 shows the block
diagram.
The variable location horizontal cursor is obtained in the same
manner as the boresight cursor. Vertical location is deter-
mined by the variable dc-level added to the sawtooth waveform.
Figure 2C shows the block diagram.
This method of generating cursors represents the least amount.
of modification to the present system and would not require.
elaborate mechanisms. Although some work would be required to
make this circuitry compatible with the existing electronics,
packaging can be done within the present electronics unit.
Figure 4 shows the proposed location of the printed circuit
boards in the electronics unit. Figure 5 is the bottom view
of the electronics unit which shows the cable harness and
terminal block. The terminal block will be moved to accommodate
installation and wiring of the circuit-board connectors. Cable
harness modification will also be necessary.
Because existing sweep waveforms are sampled and operated on
to obtain proper video inputs, some modification to existing
circuits may be necessary to match impedances and prevent over-
loading. For this reason, Texas Instruments must retain the
entire system during the integration and systems test.
SECTION III
PROGRAM SCHEDULE
The effort proposed in Section II consists of:
3.5 man-months of engineering
3.0 man-months of drafting
3.0 man-months of processing and assembly
4.0 man-months of technician effort.
The items and services include design and processing of the
necessary circuitry and interfacing of the FLIR system in order
to accomplish the design described in Section II.
5
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2.0 VDC
--0
-SCHMITT
MONO-
STABLE
MULTI-
TRIGGER
VIBRATOR
VERTICAL SWEEP
28 VDC
MONO-
SCHMITT
TRIGGER
--0
STABLE
MULTI-
VIBRATOR
0-30 VDC
HORIZONTAL SWEEP
SCHMITT
TRIGGER
DIFFER-
ENTIATOR
111111111111111
FIGURE 3
GATE
1111 1111
TO VIDEO
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CURSOR
GENERATING
CIRCUITS
4
Figure 4
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ERMINAL
7,LOCK
.)
CURSOR
CIRCUIT
;ONNECTOR
tkrtctdte
�:. -.�
Figure 5
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( I )
1EXAS INSTRUNENTS INCORPORATED
Apparatus Division
13500 North Central Expressway
Post Office Box 6015
Dallas, Texas 75222
-Propdsa1-Np.C126-CP65::.
Part 6
7 December 1966
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TABLE OF COL1TENTS
Sect ion Tit le
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I. INTRODUCTION
This proposal describes the modifications necessary for increasing
sensitivity and ease of operation of the FLIR 3 system.
Increased sensitivity will increase range of target detection and
allow more flexibility of tactics.
Ease of operation is olDtained by allowing
e control and increase crew comfor
ray is awn?:in
both detectors:
lows iemovl of
microns
oriented configuration
smallest possible image plane. The InSb arrays is 8. wafer:
substrate with the::Sensitive:-areas etched by ,photographic process.
The .010 inch spacing will insure negligible ,cross .talk .and can
be controlled within a few thousands Of , an -inch. ,
The Ge:1-ig bars will be indium soldered to individual copper
substrates. The bars are lapped to the .040 thickness. Thickness
of the copper substrates is extremely uniform and usually made
.002 to .005 inch thicker than the detector bar width. Bar
location on the substrate is held within .001 inch of the desired
location. By stacking the substrate-bar s ibassembly, very accurate
spacing can be achieved. This assembly, technique allows individual
bars to be replaced in case of failure.
The cooler-detector assembly will be relocated and new mounts
fabricated. The optic path changes since the detector is now at
the system focal point. This necessitates use of a new pyramidal
- elevation mirror.
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B. Display.
A matrix-grid cathode ray tube will be installed in each display
replacing the three-gun CRT. Of the 30 available apertures in the �
matrix, three will be used. The leading six Ge:Hg detectors will
e electrically delayed and added to the trailing set of three In
eteOtorS
Measured elmatr
aximum spot size is required for
Since horizontal
RT, two convergence 7.:,printed circu
netessar
� Because,extensive.rewiring isi.-1r.c..�s '1):a....
o
ill be redesigned. i
..f,---,,-,f,,, .,,.,..-�!'.?..
-,.
allow. relocation of sweep driver heatsink
Relocation Ivy-.use of internal that
xcessiye heat'r se will not occur.
:,-: : ::..-- �''
Electronics Unit.
video block diagram with changes noted in
new detector configuration with appropriatedelay:line
will superimpose video from all detectors Detectors 7, 8 and
will be electronically delayed and added to Ii, 5 and 6. This summe
video is then delayed and added to video from detectors 1, 2 and 3.
A seventh delay line then delays the summed video from detectors
2, 5 and 8 to correspond with the No. 2 MATRICON grid displacement.
Since all video is now superimposed, the second set of adder
circuits (adjusted externally by control unit knob) can be modified
to allow 100% of each spectrum to be simultaneously displayed.
increased the other
Previously, as video from one spectrum was
spectrum was proportionally attenuated.
:
AuXiliarYtonirOiAnit
Operational requirements for the FL 3 Systeilhave:neceSsiatedi:
,
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integration of a.second control unit into the system. This auxiliary
control will allow a second operator to control all system functions
.._
except turn on-off capability.The
funCtionaftOThe'remptely'controlled'willbe:,Scanner Elevation-
--,--
PozItIonng, DetectorSeleCtiOn; and.HotspotThre'ShoieIvel.
to switch co�tro]J from the
either ."-;s atiO
control ilI- not. be
OFT.49.0-LDCFN'tpPEA oritibfltplie
coP
ransmitteran gear bx for
HM �tent iometer otspo
-potentiometer for video
ight intensity adjustment
or an , 4
edge-lighted pane h-to- e dimmable,-pilOt lights
will be provided to show when the AU is-active,and when the systes
is cool-down and operate. A switch is included to relinquish
or ,e control. Communication vith the main control unit will be
by a single cable utilizing a 26 pin connect7r. All power and
excitation voltages will come from the main control unit.
Modification to the main control unit will include removal of
one relay, addition of four 4PDT relays, and to .ST relays. A
- new edge-lighted panel will be provided as well as a witch to trans-
fer control between the stations. A new nil:: connector
when the panel is active. An additional 26 pin connector will be
Installed for'c unication with the
TE control will remain here and not be duplicated.
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Scanner automatic stowing synchro and logic will remain here and
not be duplicated.
Because of'long lead time vendor items delivery could not be
made before 6 January 1967. If the system is already delivered,
:-.1t0414ie the-returri;:of-thxikting Control
Un week for.modification. if thIs isunacceptahie,
,
and Field
ntens
cursors aie triggered from the,middle channel of the Ge:
' 's- � �
get'appearin sweep ,would be dIsplaced 10 mr from true
'
oaation as defined-hy,the horizontal cursor. Stores drop could
com61ished with Ge: eo-onl
- ,
he new detector (Figure 1) would eliminate this undesirable featur
Since it is a new design, the detector will not be received before 30
December. As is the case with the auxiliary control unit, a modification
kit may be supplied to Field Service Personnel if tha program schedule
will not allow in-plant modifications.
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.130
141,Mteria1:. Detector 1, 2, and 3 InSb
Detector 4 through 9 Ge:Hg
A/e
� DETECTOR CONFIGURATION
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'PREAMPLIFIER
DETECTOR,
NO. 7
(Ge:Ngi
OELA!'
�T-1.4u SLC
PREAMPLIFIER
DEL L:Nr
SEC
ADDER.
!PREAMPLIFIER.
DETECTE1R
NO.
(Ge:MI;
ACD,
CTCR
NC, I
fiPOT
nTL.CTOR j
1 GATE
L.
pcsr AMR
DELAY
rAIN
CONTROL
POLARITY
CONTP.OL
DOER
FOT AMY /
r1715T
OETECTUR r DEL4'
I GAIN
CONTROL
PnLAL. ! Ty
CONTROL
VT DEN
VIDEO
DRIVER
VIC:FC
DRIVrR
D.C.
RESTORER
�FLA.!' LINE
T.I.4u SEC 1,
� POST AMP
CAIN POLAITY
ADDL4 F----
VIDEO
DRIVER
NP F)
ADPFR
GATE
ICONTROL CCNTROL
PREAMPLIFIER
PREAMPLIFIER
NOT rPOT
1
DELAY /
DETECTOR
DETECTOR
No. 9
)
DETECTOR
NO. 8
(Ge:Hg)
DETECTOR
NC ,2
)
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DELAY LINE
T..1.4u SEC
DETECTOR
MO. 5
(Ge:Mg)
ADDER
PREA.M('LIF:ER
gEM-4,Ati.,P-S-EC4 ' �
MATNICON
ND,
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r
GATE
Dt :OR
Sc 2
�
T..1,4u SEC
MOT SPOT
DETECTOR
POST AMP
DELAY
I GAIN
CONTROL
� POLARITY
CONTROL
VIDEO
DRIVTR
n r
RE.TCRER
MATP;ccN
GR!D C. 2
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DETFCTCi-,
CL D CC NE- IGUkATION
FIGURE. 3
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DISPLAY
DESIGN
COMPLETE
10-21-66
MOD! FICAT ION
GO-AHEAD
10-13-66
SCANNER
OPTICS
� ALIGNED
11-1-66
DISPLAY
ASSEMBLED
11-11- 66.
DETECTOR
RECE I VED
11-1-66
SPLAY
UNIT TEST
COMPLETE
DISPLAY �
WIRED
11- 30-66
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PERT
FL
SYSTEM
TEST COMPLETE,
12 -14- 6 6
CONTROL
� ELECTRICAL
DESIGN
COMPLETE
11-23-66
F I (
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;HART
CONTRACT. REQUIREMENTS
3
DELIVER(7---
� SYSTEM &-
DISPLAY .-#1
DELiVER
DISPLAY e2
12-3C-66
CONTROL--
OR PARTS
COMPLETE
2-1366
CONTROL
PURCHASED
PARTS
REC E I VED
12-28-66
4
DELIVER
DISPLAY 0
1-13-6 tv/
/ CONTROL
ASSEMBLY
COMPLETE
12-30-66
ITEMS
DATES
^
CONTROL
UNIT TEST
tCOMPLETE
-1-3-67 / DATE
QA/QC
1-4-67
LATEST REVISION
10-18-66
I I - 6 - 66
12-7-66
BY
� � -,4": , 41. !.7
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The scanner handling cart is usod for installation and removal of the
scanner from the aircraft and transportation and storage when. the scanner
is out of the aircraft. The cart will allow the scanner to be operated
when outside the aircraft and facilitate routine maintenance. Operation
of. the cart will utilize a hydraulic jack working through a parallelogram- .
-,type linkage to continually maintain the scanner platform in its normal
attitude with respect to the aircraft. This will simplify installation
and removal of the scanner as well as allow the elevation servo to be
realistically exercised when the scanner is out of the aircraft.
- - .
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,
II
1
.
..,
-
I
I
!
i
C
SCANNER HANDLING CART
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