US3128388A - Transfluxor integrator - Google Patents

Transfluxor integrator Download PDF

Info

Publication number
US3128388A
US3128388A US738491A US73849158A US3128388A US 3128388 A US3128388 A US 3128388A US 738491 A US738491 A US 738491A US 73849158 A US73849158 A US 73849158A US 3128388 A US3128388 A US 3128388A
Authority
US
United States
Prior art keywords
core
winding
output
level
source
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US738491A
Inventor
Arthur S Robinson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bendix Corp
Original Assignee
Bendix Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bendix Corp filed Critical Bendix Corp
Priority to US738491A priority Critical patent/US3128388A/en
Priority to DEB53379A priority patent/DE1255329B/en
Application granted granted Critical
Publication of US3128388A publication Critical patent/US3128388A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
    • H03K17/80—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used using non-linear magnetic devices; using non-linear dielectric devices
    • H03K17/82—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used using non-linear magnetic devices; using non-linear dielectric devices the devices being transfluxors
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06G—ANALOGUE COMPUTERS
    • G06G7/00—Devices in which the computing operation is performed by varying electric or magnetic quantities
    • G06G7/12—Arrangements for performing computing operations, e.g. operational amplifiers
    • G06G7/18—Arrangements for performing computing operations, e.g. operational amplifiers for integration or differentiation; for forming integrals
    • G06G7/182—Arrangements for performing computing operations, e.g. operational amplifiers for integration or differentiation; for forming integrals using magnetic elements
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11C—STATIC STORES
    • G11C27/00—Electric analogue stores, e.g. for storing instantaneous values
    • G11C27/02—Sample-and-hold arrangements
    • G11C27/022—Sample-and-hold arrangements using a magnetic memory element

Definitions

  • Electro-mechanical devices have been used for integrating heretofore, but for aircraft applications the electromechanical devices are unsatisfactory because they are too heavy and bulky.
  • One object of this invention is to provide a reliable electric circuit which integrates electric signals and stores the result indefinitely and provides non-destructive readout.
  • Another object of the invention is to provide an integrating circuit which is compact, light weight, inexpensive to manufacture and has no functionally moving parts.
  • the invention contemplates an integrating circuit having memory and non-destructive readout comprising a transfluxor initially magnetized to a predetermined level and adapted to be connected to a source of alternating current for energizing the transfiuxor and to a low-impedance source of pulsating signal voltage for changing the level of magnetization according to the instantaneous polarity of the signal voltage by an amount corresponding to the amplitude and duration of the signal voltage, the transfiuxor providing an output corresponding to the level to which the transfluxor is magnetized, and means connected to the transfluxor for providing an output corresponding to the level of magnetization of the transfluxor from the predetermined level.
  • FIGURE 1 is a diagram of a novel integrator constructed according to the invention and shows waveforms of the input signal and integrated output signal;
  • FIGURES 2 and 3 show the novel integrator used as a 7 low pass filter and a high pass filter, respectively.
  • the novel integrator constructed according to the invention and shown in FIGURE 1 comprises a transfiuxor 11 having a core 9 with a winding 8 thereon adapted to be connected to a source of direct current 10 for initially magnetizing the core for preconditioning the core by first raising the level of magnetization to completely block the core and then reducing the magnetization to a predetermined level preferably midway between completely blocked and completely unblocked to provide bidirectional operation of the core.
  • a pair of simultaneously operated three-position switches 12 are interposed between the winding 8 and source It). The switches are moved to position 12" to connect winding 8 directly to source 10 to completely block the core of the transfluxor.
  • the switches then are moved to position 12" to reverse the polarity of the source with respect to the winding and insert a resistor 14 in series with winding 8 to provide current flow through the winding in an opposite direction and of lesser magnitude than heretofore to decrease the magnetization level preferably midway between completely blocked and completely unblocked as described above.
  • Switch 12 is then moved to position 12 to disconnect winding 8 from source 10 and the trans- "ice fluxor is ready to perform the integration.
  • Resistor 14 determines the level of magnetization of the core and may be adjusted to provide any desired initial level of magnetization of the core.
  • a phase sensitive demodulator 1 is connected to a source of modulated carrier signals, not shown, and provides a direct current corresponding to the amplitude and phase of the modulated carrier signals.
  • the direct current signal then passes through a diode gate circuit 3 which provides signal pulses with a repetition rate and duration as a function of one or more variable conditions or parameters such as Mach number, altitude, etc., and a voltage drive circuit 5 which provides a low impedance source.
  • Drive circuit 5 is connected to a setting or control winding 7 on core 9 which incrementally increases or decreases the magnetization of the core, depending on the instantaneous polarity of the signal voltage applied to winding 7, by an amount corresponding to the amplitude and duration of each signal pulse applied; and the total increase or decrease in the magnetization of the core depends on the repetition rate of the pulses and the length of time the pulses are applied.
  • a primary or energizing winding 13 on core 9 is energized by a source of alternating current 15 and induces an output in a secondary winding 17 on core 9 which corresponds to the level of magnetization of core 9.
  • the output from winding 17 is applied through a peak detector circuit 21 to a modulator 19 energized by an alternating current source 20.
  • Peak detector circuit 21 supplies direct current to modulator 19 corresponding to the output of winding 17.
  • Circuit 23 comprises a source of alternating current voltage 25, out-of-phase with source 20, connected across a primary winding 27 of a transformer 29, having its secondary winding 31 connected to modulator 19 and arranged to oppose the output from the modulator.
  • Source 25 is adjusted to cancel the initial output from modulator 19 to zero the integrator.
  • Graph b--b shows the integrated signal waveform corresponding to an input signal a-a' at the input of the circuit. It will be observed that the phase of the carrier in graph b-b' does not reverse until the integral of the signal goes to zero.
  • the phase of the output carrier defines the sign of the integral and depends entirely on the amplitude of the transfluxor output with respect to the amplitude of source 25.
  • FIGURE 2 the integrator circuit of FIGURE 1 is shown in use as a low pass filter.
  • the input signal and filtered output are shown by graphs 0 and d, respectively.
  • FIGURE 3 shows the integrator circuit used as a high pass filter and graphs e and 1 show the input signals and filtered output, respectively.
  • the novel circuit disclosed provides an integrating device without moving parts capable of infinite memory and non-destructive readout and which is easily manufactured, compact and light weight.
  • An integrating circuit having memory and non-destructive readout comprising a transfiuxor having a core magnetized to a predetermined level and having a control amount corresponding to the amplitude and duration "of j the signahan energizing winding on the core adapted to be connected to" a source'of alternating current and an output winding on the core inductively coupled to 'the L' energizing winding by' an amount'corresponding to the level to which the core is magnetized, means'conne'cted to the output Winding for detecting the peak voltage of the output and providing a sine wave of predetermined frequency modulated by the peak output voltage, and means connected to the last mentioned means for providing an output corresponding to the level of magnetization of the core from the predetermined level.
  • An integrating circuit having memory and non-destructive readout'comprising a low impedance source including a gate circuit operated as a function of a variable parameter and adapted to be connected to a source of sigrial voltage to provide signal pulses with a repetition rate and duration as a function of a variable condition, a transfluxor having a core magnetized to a predetermined level, a control winding on the core'co'nnected to the gate -circuit for changing the level of magnetization of thecore according to the instantaneous polarity of the signal pulses and by an amount corresponding to the amplitude and duration of the signal pulses, an energizing winding on the core adapted to be connected to a source of alternating current, and an output Winding on the core inductively coupled to the energizing winding and providing an output corresponding to the level to which the core is magnetized, means connected to the output winding for detecting the peakireage of the output and providing a sine wave of predetermined frequency modulated

Description

A ril 7, 1964 A. s. ROBINSON TRANSF'LUXOR INTEGRATOR Filed May 28, 1958 I liENTOR. ARTHUR S RDB/NSON United States Patent O 3,128,388 TRANSFLUXOR HNTEGRATOR Arthur S. Robinson, Allendale, N.J., assignor to The Bendix Corporation, a corporation of Delaware Filed May 28, 1958, Ser. No. 738,491 2 Claims. (Cl. 307-438) This invention relates to integrators in which information may be stored and read out at any time.
Electro-mechanical devices have been used for integrating heretofore, but for aircraft applications the electromechanical devices are unsatisfactory because they are too heavy and bulky.
One object of this invention is to provide a reliable electric circuit which integrates electric signals and stores the result indefinitely and provides non-destructive readout.
Another object of the invention is to provide an integrating circuit which is compact, light weight, inexpensive to manufacture and has no functionally moving parts.
The invention contemplates an integrating circuit having memory and non-destructive readout comprising a transfluxor initially magnetized to a predetermined level and adapted to be connected to a source of alternating current for energizing the transfiuxor and to a low-impedance source of pulsating signal voltage for changing the level of magnetization according to the instantaneous polarity of the signal voltage by an amount corresponding to the amplitude and duration of the signal voltage, the transfiuxor providing an output corresponding to the level to which the transfluxor is magnetized, and means connected to the transfluxor for providing an output corresponding to the level of magnetization of the transfluxor from the predetermined level.
The foregoing and other objects and advantages of the invention will appear more fully hereinafter from a consideration of the detailed description which follows, taken together with the accompanying drawings wherein one embodiment of the invention is illustrated by way of example. It is to be expressly understood, however, that the drawings are for illustration purposes only and are not to be construed as defining the limits of the invention.
In the drawings:
FIGURE 1 is a diagram of a novel integrator constructed according to the invention and shows waveforms of the input signal and integrated output signal; and
FIGURES 2 and 3 show the novel integrator used as a 7 low pass filter and a high pass filter, respectively.
The novel integrator constructed according to the invention and shown in FIGURE 1 comprises a transfiuxor 11 having a core 9 with a winding 8 thereon adapted to be connected to a source of direct current 10 for initially magnetizing the core for preconditioning the core by first raising the level of magnetization to completely block the core and then reducing the magnetization to a predetermined level preferably midway between completely blocked and completely unblocked to provide bidirectional operation of the core. For this purpose a pair of simultaneously operated three-position switches 12 are interposed between the winding 8 and source It). The switches are moved to position 12" to connect winding 8 directly to source 10 to completely block the core of the transfluxor. The switches then are moved to position 12" to reverse the polarity of the source with respect to the winding and insert a resistor 14 in series with winding 8 to provide current flow through the winding in an opposite direction and of lesser magnitude than heretofore to decrease the magnetization level preferably midway between completely blocked and completely unblocked as described above. Switch 12 is then moved to position 12 to disconnect winding 8 from source 10 and the trans- "ice fluxor is ready to perform the integration. Resistor 14 determines the level of magnetization of the core and may be adjusted to provide any desired initial level of magnetization of the core.
A phase sensitive demodulator 1 is connected to a source of modulated carrier signals, not shown, and provides a direct current corresponding to the amplitude and phase of the modulated carrier signals. The direct current signal then passes through a diode gate circuit 3 which provides signal pulses with a repetition rate and duration as a function of one or more variable conditions or parameters such as Mach number, altitude, etc., and a voltage drive circuit 5 which provides a low impedance source. Drive circuit 5 is connected to a setting or control winding 7 on core 9 which incrementally increases or decreases the magnetization of the core, depending on the instantaneous polarity of the signal voltage applied to winding 7, by an amount corresponding to the amplitude and duration of each signal pulse applied; and the total increase or decrease in the magnetization of the core depends on the repetition rate of the pulses and the length of time the pulses are applied.
A primary or energizing winding 13 on core 9 is energized by a source of alternating current 15 and induces an output in a secondary winding 17 on core 9 which corresponds to the level of magnetization of core 9. The output from winding 17 is applied through a peak detector circuit 21 to a modulator 19 energized by an alternating current source 20. Peak detector circuit 21 supplies direct current to modulator 19 corresponding to the output of winding 17.
Since the transfluxor core is initially partially magnetized, as described above, to provide bidirectional operation, a voltage bucking circuit 23 at the output of modulator 19 provides an initial zero output. Circuit 23 comprises a source of alternating current voltage 25, out-of-phase with source 20, connected across a primary winding 27 of a transformer 29, having its secondary winding 31 connected to modulator 19 and arranged to oppose the output from the modulator. Source 25 is adjusted to cancel the initial output from modulator 19 to zero the integrator.
Graph b--b shows the integrated signal waveform corresponding to an input signal a-a' at the input of the circuit. It will be observed that the phase of the carrier in graph b-b' does not reverse until the integral of the signal goes to zero. The phase of the output carrier defines the sign of the integral and depends entirely on the amplitude of the transfluxor output with respect to the amplitude of source 25.
In FIGURE 2 the integrator circuit of FIGURE 1 is shown in use as a low pass filter. The input signal and filtered output are shown by graphs 0 and d, respectively.
FIGURE 3 shows the integrator circuit used as a high pass filter and graphs e and 1 show the input signals and filtered output, respectively.
The novel circuit disclosed provides an integrating device without moving parts capable of infinite memory and non-destructive readout and which is easily manufactured, compact and light weight.
Although but a single embodiment of the invention has been illustrated and described in detail, it is to be expressly understood that the invention is not limited thereto. Various changes may also be made in the design and arrangement of the parts without departing from the spirit and scope of the invention as the same will now be understood by those skilled in the art.
What is claimed is:
1. An integrating circuit having memory and non-destructive readout comprising a transfiuxor having a core magnetized to a predetermined level and having a control amount corresponding to the amplitude and duration "of j the signahan energizing winding on the core adapted to be connected to" a source'of alternating current and an output winding on the core inductively coupled to 'the L' energizing winding by' an amount'corresponding to the level to which the core is magnetized, means'conne'cted to the output Winding for detecting the peak voltage of the output and providing a sine wave of predetermined frequency modulated by the peak output voltage, and means connected to the last mentioned means for providing an output corresponding to the level of magnetization of the core from the predetermined level.
2. An integrating circuit having memory and non-destructive readout'comprising a low impedance source including a gate circuit operated as a function of a variable parameter and adapted to be connected to a source of sigrial voltage to provide signal pulses with a repetition rate and duration as a function of a variable condition, a transfluxor having a core magnetized to a predetermined level, a control winding on the core'co'nnected to the gate -circuit for changing the level of magnetization of thecore according to the instantaneous polarity of the signal pulses and by an amount corresponding to the amplitude and duration of the signal pulses, an energizing winding on the core adapted to be connected to a source of alternating current, and an output Winding on the core inductively coupled to the energizing winding and providing an output corresponding to the level to which the core is magnetized, means connected to the output winding for detecting the peak voitage of the output and providing a sine wave of predetermined frequency modulated by the peak output voltage, and means connected to the last mentioned means for opposing a predetermined portion of the sine wave output.
'Refere'nces Cited in the file of this patent UNITED STATES" PATENTS OTHER REFERENCES Publication: The Transfluxor, Rajchmartand L0, Proceedings of the IRE, March 1956, pp. 321-332.

Claims (1)

1. AN INTEGRATING CIRCUIT HAVING MEMORY AND NON-DESTRUCTIVE READOUT COMPRISING A TRANSFLUXOR HAVING A CORE MAGNETIZED TO A PREDETERMINED LEVEL AND HAVING A CONTROL WINDING, A LOW IMPEDANCE SOURCE OF PULSATING SIGNAL VOLTAGE CONNECTED TO THE CONTROL WINDING FOR CHANGING THE LEVEL OF MAGNETIZATION OF THE CORE ACCORDING TO THE INSTANTANEOUS POLARITY OF THE SIGNAL VOLTAGE AND BY AN AMOUNT CORRESPONDING TO THE AMPLITUDE AND DURATION OF THE SIGNAL, AN ENERGIZING WINDING ON THE CORE ADAPTED TO BE CONNECTED TO A SOURCE OF ALTERNATING CURRENT AND AN OUTPUT WINDING ON THE CORE INDUCTIVELY COUPLED TO THE ENERGIZING WINDING BY AN AMOUNT CORRESPONDING TO THE LEVEL TO WHICH THE CORE IS MAGNETIZED, MEANS CONNECTED TO THE OUTPUT WINDING FOR DETECTING THE PEAK VOLTAGE OF THE OUTPUT AND PROVIDING A SINE WAVE OF PREDETERMINED FREQUENCY MODULATED BY THE PEAK OUTPUT VOLTAGE, AND MEANS CONNECTED TO THE LAST MENTIONED MEANS FOR PROVIDING AN
US738491A 1958-05-28 1958-05-28 Transfluxor integrator Expired - Lifetime US3128388A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US738491A US3128388A (en) 1958-05-28 1958-05-28 Transfluxor integrator
DEB53379A DE1255329B (en) 1958-05-28 1959-05-27 Method of integration using a transfluxor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US738491A US3128388A (en) 1958-05-28 1958-05-28 Transfluxor integrator

Publications (1)

Publication Number Publication Date
US3128388A true US3128388A (en) 1964-04-07

Family

ID=24968245

Family Applications (1)

Application Number Title Priority Date Filing Date
US738491A Expired - Lifetime US3128388A (en) 1958-05-28 1958-05-28 Transfluxor integrator

Country Status (2)

Country Link
US (1) US3128388A (en)
DE (1) DE1255329B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3212073A (en) * 1959-09-01 1965-10-12 Texas Instruments Inc Magnetic storage

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2704842A (en) * 1951-07-12 1955-03-22 Minnesota Electronics Corp Magnetically quantified pulse generating systems
US2708219A (en) * 1952-06-25 1955-05-10 Cgs Lab Inc Electrically variable reactance keying or switching apparatus
US2830197A (en) * 1955-04-07 1958-04-08 Sperry Rand Corp Stabilized amplifier devices
US2907991A (en) * 1958-07-23 1959-10-06 Roland L Van Allen Rotary shaft position indicator
US2921136A (en) * 1955-10-31 1960-01-12 Rca Corp Transfluxor system
US2934750A (en) * 1958-01-21 1960-04-26 David H Schaefer Counting circuit
US2994067A (en) * 1954-12-07 1961-07-25 Rca Corp Magnetic systems

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2704842A (en) * 1951-07-12 1955-03-22 Minnesota Electronics Corp Magnetically quantified pulse generating systems
US2708219A (en) * 1952-06-25 1955-05-10 Cgs Lab Inc Electrically variable reactance keying or switching apparatus
US2994067A (en) * 1954-12-07 1961-07-25 Rca Corp Magnetic systems
US2830197A (en) * 1955-04-07 1958-04-08 Sperry Rand Corp Stabilized amplifier devices
US2921136A (en) * 1955-10-31 1960-01-12 Rca Corp Transfluxor system
US2934750A (en) * 1958-01-21 1960-04-26 David H Schaefer Counting circuit
US2907991A (en) * 1958-07-23 1959-10-06 Roland L Van Allen Rotary shaft position indicator

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3212073A (en) * 1959-09-01 1965-10-12 Texas Instruments Inc Magnetic storage

Also Published As

Publication number Publication date
DE1255329B (en) 1967-11-30

Similar Documents

Publication Publication Date Title
US2713675A (en) Single core binary counter
US2758221A (en) Magnetic switching device
US3568052A (en) Time interval magnetometer
US3139595A (en) Variable pulse width generator
US3128388A (en) Transfluxor integrator
US3117308A (en) Control system
US2938129A (en) Variable frequency magnetic multivibrator
US3132256A (en) Magnetic pulse amplitude to pulse length converter systems
US2822532A (en) Magnetic memory storage circuits and apparatus
US3027466A (en) Semi-conductor diode current limiting device
US3238445A (en) Saturable core pulse width control apparatus
US2894250A (en) Variable frequency magnetic multivibrator
US2798168A (en) Magnetic amplifier and flip-flop circuit embodying the same
US2862112A (en) Magnetic amplifier maximum output control
US2807775A (en) Self-saturating reactor circuit
GB832719A (en) Shifting register with inductive intermediate storage
US3275949A (en) Saturable core pulse width modulator
US2883605A (en) Modulator
US2530642A (en) Electrical control device
US3533090A (en) Magnetic analog memory
US2822511A (en) Magnetic integrator
US3156903A (en) Signal delay circuit
US2930983A (en) Magnetic amplifier devices
US2808520A (en) Bipolar output carrier magnetic amplifier
US2796535A (en) Magnetic amplifier converter and limiter