GB1067670A – Improvements relating to trigger circuits
– Google Patents
GB1067670A – Improvements relating to trigger circuits
– Google Patents
Improvements relating to trigger circuits
Info
Publication number
GB1067670A
GB1067670A
GB51011/63A
GB5101163A
GB1067670A
GB 1067670 A
GB1067670 A
GB 1067670A
GB 51011/63 A
GB51011/63 A
GB 51011/63A
GB 5101163 A
GB5101163 A
GB 5101163A
GB 1067670 A
GB1067670 A
GB 1067670A
Authority
GB
United Kingdom
Prior art keywords
circuit
stable
conductive
diode
voltage state
Prior art date
1962-12-28
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
Application number
GB51011/63A
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.)
1962-12-28
Filing date
1963-12-28
Publication date
1967-05-03
1963-03-14
Priority claimed from US265210A
external-priority
patent/US3248568A/en
1963-12-28
Application filed by International Business Machines Corp
filed
Critical
International Business Machines Corp
1967-05-03
Publication of GB1067670A
publication
Critical
patent/GB1067670A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
Classifications
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
H03K3/313—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of semiconductor devices with two electrodes, one or two potential-jump barriers, and exhibiting a negative resistance characteristic
H03K3/315—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of semiconductor devices with two electrodes, one or two potential-jump barriers, and exhibiting a negative resistance characteristic the devices being tunnel diodes
Abstract
1,067,670. Tunnel diode bi-stable and logic circuits. INTERNATIONAL BUSINESS MACHINES CORPORATION. Dec. 24, 1963 [Dec. 28, 1962; March 14, 1963], No. 51011/63. Heading H3T. A trigger circuit comprises a bi-stable device the state of which is controlled by current at a node provided by a control circuit responsive to two binary signals and the state of the bi-stable device so that switching of the bi-stable device in one sense requires simultaneous presence of a first and a second signal whilst switching in the other sense requires the second signal and the simultaneous absence of the first signal. The bi-stable device may be formed by a single tunnel diode or, as shown in Fig. 1, by a bi-stable pair of tunnel diodes 20, 22. The circuit is controlled by data pulses at 14 and clock pulses at C. Initially transistors 28, 30 are non-conductive and diode 26 conductive so that the current flowing out of the node 19 maintains the tunnel diode 20 in its high-voltage state and tunnel diode 22 in its low-voltage state, giving a lowvoltage output at O. When a negative data pulse is received at 14 current Ic becomes reduced but not sufficiently to change the stateof the bi-stable circuit 18 until a clock pulse is also received at C when transistors 28, 30 become conductive, turning off diode 26 and increasing the current into node 19 so as to set the tunnel diodes 20, 22, respectively, into their low- and high-voltage states giving a high-voltage output at O. This state is maintained until a clock pulse is received at C after the termination of the data pulse at 14, when transistors 28, 30 again become conductive, but, since the bi-stable circuit 18 is in its high-voltage state, diode 26 continues to pass current IC. The combined currents IC, IC1 are sufficient to reset the circuit 18 to its low-voltage state. In Fig. 4 the transistor 60 is initially conductive and transistors 62, 68 non-conductive so that the bi-stable circuit 50 comprising a pair of tunnel diodes is initially in a low-voltage state. On coincidence of a clock pulse at C and a data pulse at D, transistors 68, 62 become conductive and 60 non-conductive, setting the bi-stable circuit 50 to its high-voltage state. This state is maintained until a clock pulse arrives at C in the absence of data at D when 68 becomes conductive and 60 remains conductive so that the sum of currents Ib + Ia is sufficient to reset the bi-stable circuit 50 to its low-voltage state. Fig. 6 shows a bi-stable circuit comprising a pair of tunnel diodes 220, 222. When the circuit is in its low-voltage state diode 242 is reverse biased. The coincidence of a negative clock pulse at 270 and data signal at 278 causes a current I1 which switches the circuit to its high-voltage state in which diode 244 is reverse biased. The circuit is reset by a negative clock pulse at 270 which causes the current 12 which resets the circuit in the absence of data at 278.
GB51011/63A
1962-12-28
1963-12-28
Improvements relating to trigger circuits
Expired
GB1067670A
(en)
Applications Claiming Priority (2)
Application Number
Priority Date
Filing Date
Title
US247971A
US3201608A
(en)
1962-12-28
1962-12-28
Feedback conditioned coincident pulse responsive bistable circuits
US265210A
US3248568A
(en)
1963-03-14
1963-03-14
Tunnel diode level shift gate data storage device
Publications (1)
Publication Number
Publication Date
GB1067670A
true
GB1067670A
(en)
1967-05-03
Family
ID=26939005
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB51011/63A
Expired
GB1067670A
(en)
1962-12-28
1963-12-28
Improvements relating to trigger circuits
Country Status (2)
Country
Link
US
(1)
US3201608A
(en)
GB
(1)
GB1067670A
(en)
Families Citing this family (2)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US3277289A
(en)
*
1963-12-31
1966-10-04
Ibm
Logic circuits utilizing a cross-connection between complementary outputs
US3412265A
(en)
*
1965-11-24
1968-11-19
Rca Corp
High speed digital transfer circuits for bistable elements including negative resistance devices
Family Cites Families (1)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US3091737A
(en)
*
1960-06-13
1963-05-28
Bosch Arma Corp
Computer synchronizing circuit
1962
1962-12-28
US
US247971A
patent/US3201608A/en
not_active
Expired – Lifetime
1963
1963-12-28
GB
GB51011/63A
patent/GB1067670A/en
not_active
Expired
Also Published As
Publication number
Publication date
US3201608A
(en)
1965-08-17
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