US2524134A - Bucking trigger circuit - Google Patents

Bucking trigger circuit Download PDF

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Publication number
US2524134A
US2524134A US37939A US3793948A US2524134A US 2524134 A US2524134 A US 2524134A US 37939 A US37939 A US 37939A US 3793948 A US3793948 A US 3793948A US 2524134 A US2524134 A US 2524134A
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US
United States
Prior art keywords
tube
trigger
plate
voltage
grid
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
US37939A
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English (en)
Inventor
Ralph L Palmer
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.)
International Business Machines Corp
Original Assignee
International Business Machines 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
Priority to BE489565D priority Critical patent/BE489565A/xx
Priority to NL727208045A priority patent/NL147458B/xx
Application filed by International Business Machines Corp filed Critical International Business Machines Corp
Priority to US37939A priority patent/US2524134A/en
Priority to GB18105/49A priority patent/GB661335A/en
Priority to FR990423D priority patent/FR990423A/fr
Priority to CH277470D priority patent/CH277470A/fr
Application granted granted Critical
Publication of US2524134A publication Critical patent/US2524134A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K3/00—Circuits for generating electric pulses; Monostable, bistable or multistable circuits
    • H03K3/02—Generators characterised by the type of circuit or by the means used for producing pulses
    • H03K3/04—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of vacuum tubes only, with positive feedback
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K3/00—Circuits for generating electric pulses; Monostable, bistable or multistable circuits
    • H03K3/02—Generators characterised by the type of circuit or by the means used for producing pulses
    • H03K3/04—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of vacuum tubes only, with positive feedback
    • H03K3/05—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of vacuum tubes only, with positive feedback using means other than a transformer for feedback
    • H03K3/06—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of vacuum tubes only, with positive feedback using means other than a transformer for feedback using at least two tubes so coupled that the input of one is derived from the output of another, e.g. multivibrator
    • H03K3/12—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of vacuum tubes only, with positive feedback using means other than a transformer for feedback using at least two tubes so coupled that the input of one is derived from the output of another, e.g. multivibrator bistable

Definitions

  • This invention relates to trigger circuits and more particularly to triggers of the type having two grid controlled tubes and two stable conditions alternately assumed.
  • the drawing is a circuit diagram of an embodiment of the novel trigger circuit of the invention.
  • the trigger includes the tubes l0 and H. These tubes may be of the type in which a single tube is contained in one envelope or of the type wherein the two tubes are contained in the same envelope such as a 6J6.
  • each tube l0 and H is connected to a +150 volt line through resistors l3 and M in series having values of 12,000 ohms and 7,500 ohms, respectively.
  • the cathodes are connected together and through a resistor I5 of 19,700 ohms to a volt line 16.
  • the control grid of the tube I0 is connected through resistors ll and [8 of 1,000 ohms and 200,000 ohms, respectively, to the 100 volt line 16.
  • the control grid of the tube I l is connected through resistors l9 and 20 of 1,000 ohms and 200,000 ohms, respectively, to the line It.
  • the plate of. the tube i0 is connected through a lead 2!, a resistor 22 of 200,000 ohms and the resistor IQ of 1,000 ohms to the control grid of the tube H.
  • the plate of the tube H is connected through a lead 23, a resistor 24 of 200,000. ohms and the resistor ll of 1,000 ohms to the control grid of the tube [0.
  • the plate of the tube It! is connected to its own control grid through a lead 25, a capacitor 26 of 0.005 microfarad and the resistor ll.
  • the plate of the tube l! is connected to its own control grid through a lead 27, a capacitor 28 of 0.005 microfarad and the resistor l9.
  • Input terminal 29 is connected through a lead 30 and a resistor 3
  • Input terminal 34 is connected through a lead 35 and a resistor 36 of 100,000 ohms to the resistor l9 connected to the control grid of the tube ll. Input terminal 34 is also connected to the ground or zero voltage line 32 through the lead 35 and a resistor 31 of 5,100 ohms.
  • An output terminal 38 is connected via line 23 directly to the plate of tube I l and the output is taken between terminal 38 and the ground line 32.
  • the two stable conditions of the trigger are designated herein as the on and "off conditions.
  • the trigger is on, when the tube I is conductive and the tube l l is non-conductive, and the trigger is off when the tube in is nonconductive and the tube H is conductive.
  • the novel trigger is assumed to be initially o (i. e. with tube H conducting) as indicated by the dot to the lower right of the tube l I.
  • a positive pulse may be applied to the input terminal 29 and the voltage at the control grid of the tube l0 made sufficiently positive to render the tube conductive.
  • the volt- -age at the plate of the tube I0 is decreased and the decreased voltage is transferred through the lead 2
  • the resulting increased voltage at the plate of the tube H is transferred through the lead 23 and the resistors 24 and I! to the control grid of the tube ill, to render it still more conductive.
  • This cumulative action is continued until the tube l0 reaches a steady state of conduction and the tube ll becomes non-con ductive, to maintain the trigger on.
  • a positive pulse may be applied to the input terminal 34 and the voltage at the control grid of the tube II is thus made sufficiently posi-
  • the resulting decreased voltage at the plate of the tube H is transferred through the lead 23 and the resistors 24 and I! to the control grid of the tube ID to decrease the conduction of the tube I0.
  • the resulting increased voltage at the plate of the tube I 0 is transferred through the lead 2! and the resistors 22 and H), to the control grid of the tube H to render it still more conductive. This cumulative action is continued until the tube ll reaches a steady state of conduction and the tube it! becomes non-conductive, to maintain the trigger ofi.
  • the trigger may be switched from one stable condition to the other, by applying positive pulses alternately to the input terminals 29 and 34, respectively.
  • bucking action When pulses are applied simultaneously to the control grids of the tubes l0 and l l, the stable condition of the trigger is not changed.
  • the increased conduction of the initially conductive tube is utilized to buck and prevent a change in the stable condition of the trigger.
  • This action is referred to herein as bucking action and the novel trigger arrangement for efiecting it is referred to as a bucking trigger.
  • the input terminals 29 and 34 are connected together or any conventional means may be employed to apply pulses to these terminals substantially simultaneously.
  • the mere connecting together of the terminals causes no change in the stable condition of the trigger and has substantially no 4 effect on it, since the terminals 29 and 34 are at substantially the same voltage.
  • the voltage on the control grid of the tube I 0 is increased by the pulse applied, it is insufficient to render the tube l0 conductive because of the increased Voltage at the cathode.
  • the bucking action effected by the increased current flow through the conductive tube of the trigger prevents conduction through the non-conductive tube and maintains the trigger in the same stable condition.
  • These capacitors provide a degenerative feedback circuit for the respective tubes and tend to maintain them in their present conductive state, resisting any change in the stable condition of the trigger.
  • the capacitors delay the switching of the trigger from either stable condition to the other. This delay permits a departure from simultaneity or mistiming in the application of pulses to the terminals 29 and 34 without producing a switching of the trigger.
  • the actual departure from simultaneity permitted without sacrificing the bucking action described will vary with the design of each particular trigger.
  • the triggers described, wherein the capacitors 2E and 28 are each of 0.005 microfarad, permits a mistiming in the order of 2,000 microseconds, before the trigger is switched in response to either pulse.
  • the trigger of the invention is peculiarly useful for producing ordinary triggerin in response to pulses of predetermined characteristics or as a bucking trigger when pulses are received by it simultaneously.
  • a trigger circuit having two grid controlled tubes each including a cathode, a grid and a plate, said trigger having two stable conditions alternately assumed; a resistance of 200K ohms connected from the plate of each tube to the control grid of the other; a connection to the control grid of each tube for switching the trigger from either stable condition to the other; and a capacitor of 0.005 microfarads connected from the plate to the control grid of each tube for providin degenerative feedback to resist a change in the conductive state of the tube and thereby delay the switchin of the trigger for the order of 2000 microseconds.
  • a trigger circuit having two grid controlled tubes each including a cathode, a grid and a plate, each trigger having two stable conditions alternately assumed; a resistive connection from the plate of each tube to thecontrol grid of the other; a connection to the control grid of each tube for switching the trigger from either stable condition to the other; a capacitive connection from the plate to the control grid of each tube for resisting a change in the conductive state of the tube; a conductive connection between the cathodes of the tubes so that the voltage at each cathode is substantially equal to that at the other at all times; and a resistor connecting the cathodes to a source of voltage whereby the increased conduction through either tube in response to a pulse causes an increased voltage at the cathodes rendering the other tube non-responsive to said pulse.
  • a trigger circuit including two grid controlled tubes each including a cathode, a grid and a plate and each having its plate connected through a load to a positive voltage source said trigger having two conditions of stability alternately assumed, a resistive connection only between the plate of each tube and the control grid of the other, a degenerative coupling between the plate of each tube and its grid, a common cathode resistance connecting the cathodes of said tubes to a negative voltage source, a bias resistance between the control grid of each tube and said negative voltage source, a first input terminal resistively connected to the control grid of one tube for applying positive pulses thereto and resistively connected to a zero voltage line, a second input terminal resistively connected to the control grid of the other tube for applying positive pulses thereto and resistively connected to a zero voltage line whereby the trigger is switched from each condition of stability to the other alternately only in response to pulses applied alternately to said input terminals.
  • a bucking trigger circuit having two grid controlled tubes, each including a cathode, a rid and a plate, said trigger having two stable conditions alternately assumed in response to pulses, wherein pulses applied simultaneously to an electrode of each tube do not produce a change in the stable condition of the trigger, including a resistive connection from the plate of each tube to a grid of the other for controlling that grid voltage of each tube in accordance with the plate voltage of the other, a capacitive connection from the plate of each tube to a grid thereof and means for maintaining voltage equalization between corresponding cathodes of said tubes for preventing a change in the stable condition of the trigger when pulses are applied simultaneously to both tubes, said means including a conductive connection between said cathodes.
  • a trigger circuit having two grid controlled tubes each includin a cathode, a grid and a plate, said trigger havin two stable conditions alternately assumed; a purely resistive connection from the plate of each tube to the control grid of the other, connections to the contro1 grid of each tube for switching the trigger from either stable condition to the other and a capacitive connection from the plate to the control grid of each tube for resisting a change in the conductive state of the tube.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Electrostatic Separation (AREA)
US37939A 1948-07-09 1948-07-09 Bucking trigger circuit Expired - Lifetime US2524134A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
BE489565D BE489565A (fr) 1948-07-09
NL727208045A NL147458B (nl) 1948-07-09 Werkwijze voor het bereiden van een elastomeersamenstelling, alsmede voortbrengsel, gevormd van een aldus bereide elastomeersamenstelling.
US37939A US2524134A (en) 1948-07-09 1948-07-09 Bucking trigger circuit
GB18105/49A GB661335A (en) 1948-07-09 1949-07-08 Improvements in and relating to trigger circuits employing grid controlled tubes
FR990423D FR990423A (fr) 1948-07-09 1949-07-08 Circuit électrique basculant
CH277470D CH277470A (fr) 1948-07-09 1949-07-09 Circuit électrique "basculant".

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US37939A US2524134A (en) 1948-07-09 1948-07-09 Bucking trigger circuit

Publications (1)

Publication Number Publication Date
US2524134A true US2524134A (en) 1950-10-03

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Family Applications (1)

Application Number Title Priority Date Filing Date
US37939A Expired - Lifetime US2524134A (en) 1948-07-09 1948-07-09 Bucking trigger circuit

Country Status (6)

Country Link
US (1) US2524134A (fr)
BE (1) BE489565A (fr)
CH (1) CH277470A (fr)
FR (1) FR990423A (fr)
GB (1) GB661335A (fr)
NL (1) NL147458B (fr)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2696557A (en) * 1949-11-16 1954-12-07 Gen Precision Lab Inc Self-monitoring trigger generator
US2764677A (en) * 1952-12-23 1956-09-25 Bell Telephone Labor Inc Monostable multivibrator
US2782306A (en) * 1951-08-09 1957-02-19 Ibm Electronic trigger circuit
US2892084A (en) * 1957-11-25 1959-06-23 Jr Dwight D Wilcox Pulse gating circuit
US2894128A (en) * 1954-12-24 1959-07-07 Ibm Mono-stable multivibrator
US2903525A (en) * 1956-09-04 1959-09-08 Hughes Aircraft Co Phase inverter
US2934603A (en) * 1951-07-12 1960-04-26 Nederlanden Staat Electronic relay and the control of arrangements therewith
US3008088A (en) * 1957-11-07 1961-11-07 Bell Telephone Labor Inc Synchronized multivibrator with selectable clamping means for rendering it inoperative
US3111626A (en) * 1959-10-23 1963-11-19 Nederlanden Staat Gating circuit with stabilizing means at the voltage divider output tap of each multivibrator therein
US3249762A (en) * 1961-10-09 1966-05-03 Cutler Hammer Inc Binary logic modules
US3335333A (en) * 1964-11-12 1967-08-08 Ideal Ind Bistable multivibrator for operating a pair of control coils

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2211750A (en) * 1937-03-09 1940-08-20 Cable & Wireless Ltd Wireless telegraph system
US2457974A (en) * 1943-06-17 1949-01-04 Rca Corp Pulse type telegraph receiver
US2461871A (en) * 1947-08-01 1949-02-15 Avco Mfg Corp Relaxation oscillator capacitance multivibrator

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2211750A (en) * 1937-03-09 1940-08-20 Cable & Wireless Ltd Wireless telegraph system
US2457974A (en) * 1943-06-17 1949-01-04 Rca Corp Pulse type telegraph receiver
US2461871A (en) * 1947-08-01 1949-02-15 Avco Mfg Corp Relaxation oscillator capacitance multivibrator

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2696557A (en) * 1949-11-16 1954-12-07 Gen Precision Lab Inc Self-monitoring trigger generator
US2934603A (en) * 1951-07-12 1960-04-26 Nederlanden Staat Electronic relay and the control of arrangements therewith
US2782306A (en) * 1951-08-09 1957-02-19 Ibm Electronic trigger circuit
US2764677A (en) * 1952-12-23 1956-09-25 Bell Telephone Labor Inc Monostable multivibrator
US2894128A (en) * 1954-12-24 1959-07-07 Ibm Mono-stable multivibrator
US2903525A (en) * 1956-09-04 1959-09-08 Hughes Aircraft Co Phase inverter
US3008088A (en) * 1957-11-07 1961-11-07 Bell Telephone Labor Inc Synchronized multivibrator with selectable clamping means for rendering it inoperative
US2892084A (en) * 1957-11-25 1959-06-23 Jr Dwight D Wilcox Pulse gating circuit
US3111626A (en) * 1959-10-23 1963-11-19 Nederlanden Staat Gating circuit with stabilizing means at the voltage divider output tap of each multivibrator therein
US3249762A (en) * 1961-10-09 1966-05-03 Cutler Hammer Inc Binary logic modules
US3335333A (en) * 1964-11-12 1967-08-08 Ideal Ind Bistable multivibrator for operating a pair of control coils

Also Published As

Publication number Publication date
CH277470A (fr) 1951-08-31
FR990423A (fr) 1951-09-21
BE489565A (fr)
NL147458B (nl)
GB661335A (en) 1951-11-21

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