Patent US4199151A successfully refreshed from Google Patents.
Patent EP0260033A2 successfully refreshed from Google Patents.
EP0260033A2
Expired / Lapsed
EP
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Semiconductor integrated circuits
Assignee: Pilkington Micro Electronics Ltd
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Filing: 1987-08-27
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Granted: —
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Expires: 2007-08-27
Abstract
Abstract Selectable signal connection provisions (30 or 50) are made for passing signals relative to logic circuitry of digital bipolar semiconductor integrated circuits. Each such provision (30 or 50) has formed on the chip for each selectable signal connection, an active circuit element (22 or 42) whose conduction state relative to signals concerned is controlled by applied circuit conditions. The conditions are selected by operative control circuitry (32 or 52) responsive to a configuring or selection signal (at 34 or 54) applied temporarily thereto for switching between stable states and thus determining the conduction state of the active circuit element (22 or 42)
Inventors
- 👤 Kenneth Austin
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-01 09:21
CPC Classifications
H; H03; H03K; H03K19/00; H03K19/02; H03K19/08; H03K19/082; H03K17/00; H03K17/51; H03K17/56; H03K17/60; H03K17/602; H03K19/173; H03K19/1733; H03K19/1735; H03K19/1736
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
115 words
A digital bipolar semiconductor integrated circuit comprising logic circuitry (20) having selectable signal connection provisions (30 or 50) for passing signals relative to said logic circuitry, such provisions comprising, formed on the chip for each selectable signal connection: an active circuit element (22 or 42) whose conduction state relative to signals (on 10A or 12A) concerned is controlled by applied circuit conditions; and operative control circuitry (32 or 52) responsive to a configuring or selection signal applied temporarily thereto (at 34 or 54) for switching between stable states of the operative control circuitry (32 or 52) that determine said applied circuit conditions and thus the conduction state of the active circuit element (22 or 42).
Claim 2
Dependent Claim
115 words
A digital bipolar semiconductor integrated circuit comprising logic circuitry (20) having selectable signal connection provisions (30 or 50) for passing signals relative to said logic circuitry, such provisions comprising, formed on the chip for each selectable signal connection: an active circuit element (22 or 42) whose conduction state relative to signals (on 10A or 12A) concerned is controlled by applied circuit conditions; and operative control circuitry (32 or 52) responsive to a configuring or selection signal applied temporarily thereto (at 34 or 54) for switching between stable states of the operative control circuitry (32 or 52) that determine said applied circuit conditions and thus the conduction state of the active circuit element (22 or 42).
Claim 3
Dependent Claim
59 words
A digital bipolar semiconductor integrated circuit according to claim 1, wherein each said operative control circuitry (32 or 52) comprises an active latch circuit (32A, 32B or 52A, 52B) responsive to a trigger signal (at 34 or 54) as said selection signal to switch its stable state by its own action and once triggered to remain in that state.
Claim 4
Dependent Claim
75 words
A digital bipolar semiconductor integrated circuit according to claim 2, wherein each said latch circuit (32 or 52) has a formation operative as two complementary transistors (32A, 32B or 52A, 52B) each connected (33A, 33B or 53A, 53B) by its base to the collector of the other and triggered at one of the base connections (33B at 34 or 53B at 54) to latch one emitter to a particular one of two possible voltage conditions.
Claim 5
Dependent Claim
49 words
A digital bipolar semiconductor integrated circuit according to claim 2 or claim 3, comprising a selection transistor (36 or 56) connected to the latch circuit (32 or 52) for application thereto (at 34 or 54) of trigger signals for selection of the conductive state of the active circuit element.
Claim 6
Dependent Claim
53 words
A digital bipolar semiconductor integrated circuit according to any preceding claim, wherein each said active circuit element (22 or 42) comprises a transistor whose collector-emitter path affords the corresponding said selectable signal connection and whose control electrode is connected to said operative control circuitry (32 or 52) for selectively rendering the transistor conductive.
Claim 7
Dependent Claim
66 words
A digital bipolar semiconductor integrated circuit according to claim 5, wherein said logic circuitry (20) includes at least one logic gate (20) for which each input stage comprises a said transistor (22) selectable as to whether such input stage is operative, said logic gate (20) having a further transistor (24) serving as output stage and connected in common to said transistors (22) of its input stages.
Claim 8
Dependent Claim
40 words
A digital bipolar semiconductor integrated circuit according to claim 6, wherein said further transistor (24) has an output (12) serving for connection directly to said selectable signal connection provisions for input stages of other logic gates of said logic circuitry.
Claim 9
Dependent Claim
35 words
A digital bipolar semiconductor integrated circuit according to any preceding claim, wherein said selectable signal connection provisions (30) are at inputs to logic gates of said logic circuitry and also (50) at output branches therefrom.
Claim 10
Dependent Claim
27 words
A digital bipolar semiconductor integrated circuit according to claim 8 wherein each said transistor (42) of an output branch is further associated with an inverting transistor (44).
Claim 11
Dependent Claim
54 words
A digital bipolar semiconductor integrated circuit according to any preceding claim, wherein said operative control circuitry (32 or 52) has input provisions (43A, 63A) for a reset signal, the operative control circuitry (32 or 52) being responsive thereto to apply circuit conditions wherein said active circuit element reverts from its previously selected conduction state.
Claim 12
Dependent Claim
115 words
A digital bipolar semiconductor integrated circuit comprising logic circuitry of which each logic gate (20) has input (10) and output (12) connections, wherein at least each input connection (10A etc) is by way of an active circuit element (22 or 42) whose conduction state for logic signals is selectable according to applied circuit conditions, and each active circuit element (22 or 42) has associated therewith an active latch formation (32 or 52) responsive to selection trigger signals (at 34 or 54) to switch from one to another of its two stable states which other state corresponds to circuit conditions applied to the associated said active circuit element (22 or 42) to select its conduction state.
Claim 13
Dependent Claim
115 words
A digital bipolar semiconductor integrated circuit comprising logic circuitry of which each logic gate (20) has input (10) and output (12) connections, wherein at least each input connection (10A etc) is by way of an active circuit element (22 or 42) whose conduction state for logic signals is selectable according to applied circuit conditions, and each active circuit element (22 or 42) has associated therewith an active latch formation (32 or 52) responsive to selection trigger signals (at 34 or 54) to switch from one to another of its two stable states which other state corresponds to circuit conditions applied to the associated said active circuit element (22 or 42) to select its conduction state.
References Cited (Backward Citations)
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