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MAGNETIC CORE, COMPONENTS for the Electronics Industry

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MAGNETIC CORE, COMPONENTS for the Electronics Industry MAGNETIC CORE, COMPONENTS For The Electronics Industry " D-I7( Core-Diode Type MAGNETIC SHIFT REGISTER ASSEMBLIES MAGNETIC SHIFT REGISTERS consist of a discharges through the pulse forming inductance number of square loop magnetic cores connec­ and resistance causing current to flow in the in­ ted so that digital information may be logically put winding of core 2 switching it to the one shifted from one core to the next hy the shift current state. In this manner one signals may be trans­ pulse. The general circuit is shown below. ferred down long lines of cores with no effec­ tive attenuation. The zero signal may be trans­ Information storage in a core is accomplished by ferred from one core to another since there is no arbitrarily associating the numbers 0 and 1 with large flux change in the output winding and, hence, the two residual magnetic states inherent in square the next core receives no input signal. The ratio BH curve types of magnetic material. With the the one signal to the zero signal is an important application of a shift pulse, all cores are switched to the zero state. If a pulse is now applied to the in­ measure of the electrical performance of the register put winding of core 1 this core will change to the and should be as large as possible. one state and will be stored until such time as the Sprague offers single and multiple stage register shift pulse is again applied. As the shift pulse is assemblies with read and write provisions to meet applied core 1 returns to the zero state producing a individual system requirements. All units employ large flux change which results in a voltage appear­ high reliability components ruggedly assembled ing at the output winding of core 1. This voltage for long service. Semi-conductor diodes may be causes current to flow through the diode and char­ externally connected between suitably spaced ter­ ges capacitor C. minals or permanently packaged as an integral After the shift pulse IS com pleted the capacitor component of each assembly. OPL ATE OF A[ PARALLEL READ OUT U,..-----A-l-------- D:J~{R SER~ I NP~ Ie ~ er,-· __I_± __ c_:=J_L ___R__ oSu E T~ ~ ~ . v r-"-,(-: I) ~ OPTIONAL PARALLEL r- -,-:. 6 6 READ IN OR OUT _ ___ -l"" 6 6 Dwe NO. /,-125;'/1 GENERAL CIRCUIT FOR CORE-DIODE TYPE MAGNETIC SHIFT REGISTERS OSCILLOGRAMS FOR A TYPICAL m CORE-DIODE TYPE MAGNETIC =Z SHIFT REGISTER c:~ r-Z See Ie, Scale, r-m mm 5 }.!sec/ division 100 me / division :::!'" 1.25 volts/ division 1 }.!sec/ division z-Z G') Parallel Read-Out Signal at A Shift Current Pulse at B -0 o o o SPRAGUE ENGINEERING BULLETIN No. 9000 Sprague core-diode type shift register assem­ All Sprague shift register cores are subjected to blies are offered in a ,variety of package designs rigid switching tests which carefully control the which have been developed to be compatible with basic parameters important to reliable operation all modern wiring techniques and equipment con­ in the final circuit application. Finished assemblies struction. Two general application groups have are 100% pulse performance tested to insure uni­ been recognized in the various package designs - formity and to maintain engineering specifica­ ground and airborne equipments. The ground tions. equipment packages are available in hermetically sealed corrosion-resistant metal cases with glass-to­ Further information on Sprague's production pro­ metal solder-seal terminals for extreme humidity cedures will be found in the paper entitled "Quality resistance and are also manufactured as plastic­ Control of Magnetic Sub-Assemblies", which ap­ embedded assemblies for moderate environmental pearedin the Proceedings of the 1956 Electronic conditions. For lower costs, assemblies can be Components Symposium. Reprints of this paper packaged in an epoxy-dipped configuration. may be obtained on letterhead request to the Technical Literature Section, Sprague Electric The airborne package is a premium assembly of Company, North Adams, Mass. the smallest possible volume. Performance and operating details for represen­ All units employ high reliability components tative units are given in various Sprague engineering assembled together to assure ruggedness and long data sheets. In addition to these single bit registers, life. Semi-conductor diodes may be externally numerous other assemblies have been custom engi­ connected between suitably spaced terminals or, neered and, in some cases, have been manufactured in special designs, permanently packaged as an on a confidential basis in accordance with a cus­ integral component of each assembly. tomer's own circuit design. GENERAL PERFORMANCE CHARACTERISTICS All assemblies are manufactured to the following 3. Insulation Resistance. The minimum insula­ general specifications: tion resistance between electrically isolated ter­ minals and between terminal and case shall be 1. Operating Temperature. The standard 20,000 megohms at 25 C when measured at 180 series of magnetic shift registers may be operated volts doc. between -55 C and+85 C except where limited 4. Life Tests. All individual components em­ by the semi-conductor diodes. ployed will meet appropriate life tests at one and a half times peak operating conditions with no evi­ 2. Humidity Resistance. Hermetically-sealed units dence of deterioration. meet applicable requirements of military specifica­ S. D-C Voltage Rating. Standard registers are tion MIL-T-27 for transformers. The resin-em­ designed for a nominal voltage rating between bedded units will meet more moderate specifica­ windings of 400 volts doc. Special designs are tions. available for higher actual working voltages. Printed in U. S. Amer. Definitions of PARAMETERS AND CHARACTERISTIC TERMS USED IN CONNECTION WITH MAGNETIC SHIFT REGISTERS SHIFT PULSE The load impedance is defined as the smallest The shift or advance pulse is derived from the resistive load which may be connected across the driver stage which is a pulse current source, and parallel output terminals (across the capacitor) which provides the energy for operating the mag­ without modifying the output signal or the tolerance netic system. The general wave shape of the shift pulse is shown below: curve. INPUT PULSE The input pulse sets a core to the one state. This input is used to introduce serial information into DWG. NO. A-I098S the shift register. The pulse shape is not critical A Half Amplitude Pulse Width-microseconds but should have the time average amplitude as stated B Rise Time (10% to 90%) - microseconds C Fall Time (10% to 90%) - microseconds in the required interval. The input pulse may be D Amplitude-milliamperes larger in amplitude over a shorter period of time or PARALLEL OUTPUT PULSE vice versa, as long as the core is fully set to the one The parallel output pulse is the pulse voltage de­ state before the shift pulse occurs. The nominal veloped across the capacitor as the result of apply­ value is stated in each case. The input terminals ing a shift pulse to a core containing a one. The present a low impedance load. general wave shape is shown below: en -a PEAK PULSE POWER :a ::a This term describes the maximum peak pulse a power required to transfer a one from one core to c DWG. NO A-I38SA rn another and is defined as the product of the peak A Amplitude-volts B Half Amplitude Pulse Width - microseconds voltage developed across a single shift winding and UJZ'" C Rise Time (10% to 90%) - microseconds cS! D the peak amplitude of the shift pulse current. Undershoot - volts .... mZ mm Zz::::!lIII (il ~ SPRAGUE ELECTRIC COMPANY • North Adams, Massachusetts o o III!III SPRAGUE ELECTRIC COmPAny North Adams, Massachusetts • • • MAKERS OF RELIABLE ELECTRONIC COMPONENTS In the construction of the components described, the full intent of the specification will be met. The Sprague Electric Company, how­ ever, reserves the right to make, from time to time, such departures from the detail specifications as may be required to permit improve. ments in the design of its products. Components made under military approvals will be in accordance with the approval requirements. Printed in U. S. Amer. E-3-59 PART NUMBERING SYSTEM FOR CORE-DIODE TYPE MAGNETIC SHIFT REGISTERS ALWAYS SPECIFY BY COMPLETE CATALOG NUMBER, SUCH AS: 80Z 8 B 2 1 LVOLTAGE SIGNAL LEVEL. Voltage Level Code 1 =4 volts 2= 10 volts 3= 15 volts 4= 20 volts 5=30 volts REPETITION RATE. Repetition Rate Code 1 =0-1 kc 2= 0-25 kc 3=0.100 kc 4=0-200 kc 5=0-500 kc TYPE OF TERMINAL, A = Press Lead; B = Wire Pin; C = Turret Lug; F = Wire Lead D = Lug- Type Glass-to-Metal Solder Seal; E = Miniature Tube Pin NUMBER OF TERMINALS: 8, 9, or 10. The number of terminals is determined by the schematic diagram. Standard schematic drawings are shown on page 2. en -a SPRAGUE PACKAGE TYPE. ::a :a Electrical performance characteristics are given in the applicable Engineering Data Sheets. Only those shown are C') available as standard items. c: rn m ",Z c2... z "'mmm :::!::a z-Z G) o~ SPECIAL PRODUCTS DIVISION .... SPRAGUE ELECTRIC COMPANY • North Adams, Massachusetts SPRAGUE ENGINEERING BULLETIN No. 9010 A STANDARD SCHEMATIC DRAWINGS 2 DIODE IS SUPPLIED SEPARATELY AT REQUEST U• ( OF CUSTOMER :J(Q)~ ~ NO.9 PIN IS DUMMY owr;. NO. A-I37S WITHOUT EXTRA WINDING 2 (DIODE IS SUPPLIED SEPARATELY AT REQUEST U • OF CUSTOMER :J(Q)~ , ·n -~~-' WITH EXTRA WINDING WHEN EXTRA WINDING IS REQUIRED WITH PLUG-IN PACKAGES 86Z AND 91Z, THE FOLLOWING SCHEMATIC APPLIES: 2. (DIODE ISSUPPLIED SEPARATELY AT REQUEST U OF CUSTOMER :J. (Q) '---..----I--+-----'T'-<: DWG. NO. A-I']8I TYPES OF TERMINALS 0.031 I ~';'~ . on" ";"11.r-r--r--- 0.281 ±O.031 fi;±O.031 i i -...J ~ 0.033±O.002 \+0.062 DIA DWr;.
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