GB1529968A - Transistor circuits - Google Patents

Transistor circuits

Info

Publication number
GB1529968A
GB1529968A GB2620176A GB2620176A GB1529968A GB 1529968 A GB1529968 A GB 1529968A GB 2620176 A GB2620176 A GB 2620176A GB 2620176 A GB2620176 A GB 2620176A GB 1529968 A GB1529968 A GB 1529968A
Authority
GB
United Kingdom
Prior art keywords
current
radiation
compensating
circuit
junction
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
Application number
GB2620176A
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.)
Secretary of State for Defence Canada
UK Secretary of State for Defence
Original Assignee
Secretary of State for Defence Canada
UK Secretary of State for Defence
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 SE7605127A priority Critical patent/SE7605127L/en
Priority to DK275476A priority patent/DK275476A/en
Application filed by Secretary of State for Defence Canada, UK Secretary of State for Defence filed Critical Secretary of State for Defence Canada
Priority to GB2620176A priority patent/GB1529968A/en
Publication of GB1529968A publication Critical patent/GB1529968A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K19/00—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits
    • H03K19/003—Modifications for increasing the reliability for protection
    • H03K19/0033—Radiation hardening
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
    • H01L27/02—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having at least one potential-jump barrier or surface barrier; including integrated passive circuit elements with at least one potential-jump barrier or surface barrier
    • H01L27/0203—Particular design considerations for integrated circuits
    • H01L27/0248—Particular design considerations for integrated circuits for electrical or thermal protection, e.g. electrostatic discharge [ESD] protection

Abstract

1529968 Compensating radiation effects in integrated circuits DEFENCE SECRETARY OF STATE FOR 17 June 1977 [23 June 1976] 26201/76 Heading H3T Spurious currents arising in an integrated circuit due to ionizing radiation falling on a junction are compensated by a circuit presenting a high impedance to the remainder of the circuit in the absence of radiation. In known logic circuits the current from transistor Ql which ought to turn transistor Q2 on may, in the presence of radiation, be so shunted through the collector-substrate junction of Ql (represented by a reverse biased diode DCSQ 1) that Q2 fails to turn on. According to the invention a compensating current is supplied by a circuit QA QB QC. QA is larger than QB and the photo currents 1, 2 through its junctions in the presence of ionizing radiation, outweigh the photo current in QB, to provide a net base current which is amplified by QB. The emitter current of QB flowing through resistor RA controls the flow of compensating current through QC to the collector substrate-junction of Q 1. If RA can be made large enough, the photo current of QC amplified by itself is sufficient to provide the compensating current and QA and QB can be omitted.
GB2620176A 1975-06-19 1977-06-17 Transistor circuits Expired GB1529968A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
SE7605127A SE7605127L (en) 1975-06-19 1976-05-05 FESTDON
DK275476A DK275476A (en) 1975-06-19 1976-06-18 HOLDER FOR ATTACHING A PLATE TO A SUPPORT
GB2620176A GB1529968A (en) 1977-06-17 1977-06-17 Transistor circuits

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2620176A GB1529968A (en) 1977-06-17 1977-06-17 Transistor circuits

Publications (1)

Publication Number Publication Date
GB1529968A true GB1529968A (en) 1978-10-25

Family

ID=10239944

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2620176A Expired GB1529968A (en) 1975-06-19 1977-06-17 Transistor circuits

Country Status (1)

Country Link
GB (1) GB1529968A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000071173A2 (en) * 1999-05-21 2000-11-30 Minimed Inc. Device and method for circuit protection during radiation sterilization
US6880242B2 (en) 2000-04-24 2005-04-19 Minimed Inc. Method for circuit protection during radiation sterilization

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000071173A2 (en) * 1999-05-21 2000-11-30 Minimed Inc. Device and method for circuit protection during radiation sterilization
WO2000071173A3 (en) * 1999-05-21 2001-04-19 Minimed Inc Device and method for circuit protection during radiation sterilization
US6880242B2 (en) 2000-04-24 2005-04-19 Minimed Inc. Method for circuit protection during radiation sterilization

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee