Patent US5202965A successfully refreshed from Google Patents.
US5202965A
Expired / Lapsed
US
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Electronic system with a plurality of removable units
Assignee: Bull SAS
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Filing: 1992-07-29
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Granted: 1993-04-13
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Expires: 2012-07-29
Abstract
Abstract The invention pertains to electronic data processing systems including a plurality of removable units that communicate with one another via a bus. To enable disconnection or connection of the removable units without interrupting the operation of the system, each unit includes first means (4) controlled selectively by a maintenance device, to assure the functional isolation of the removable units. The system further includes second means (8, 1B) capable of causing the reception devices (1) of the units to function by a mode that procures increased immunity to interference for them.
Inventors
- 👤 Claude Ahn
- 👤 Robert Chikli-Pariente
- 👤 Rolland Marbot
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:57
CPC Classifications
G; G06; G06F; G06F13/00; G06F13/38; G06F13/40; G06F13/4063; G06F13/4068; G06F13/4081; B; B65; B65H; B65H54/00; B65H54/02; B65H54/38; B65H54/381; B65H54/383; B65H2701/00; B65H2701/30; B65H2701/31
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
221 words
An electronic system having at least one bus (B, B') to connect a plurality of units (U1, U2, U3, U4) of the system to one another for carrying signals therebetween, each of said plurality of units comprising at least one device selected from the group consisting of transmission devices and reception devices, at least one of said plurality of units having a reception device, each unit communicating with a maintenance device (SP), one or more of said units (U1) being removably connected to said bus, said system being characterized in that each of said removable units (U1) includes first means (4) controlled selectively by said maintenance device (SP) to assure the functional isolation of said removable unit (U1) and that said system includes second means (8) controlled by said maintenance device (SP) for causing the reception devices (1) of said units (U1, U2, U3, U4) to shift from a normal mode to an increased immunity mode for reception with an increased immunity to interference, and that upon disconnection or connection of any one of said removable units, said first means of that removable unit is activated by said maintenance device to assure the functional isolation of that removable unit and said second means causes the reception devices of the other of said removable units to shift into the increased immunity mode.
Claim 2
Dependent Claim
221 words
An electronic system having at least one bus (B, B') to connect a plurality of units (U1, U2, U3, U4) of the system to one another for carrying signals therebetween, each of said plurality of units comprising at least one device selected from the group consisting of transmission devices and reception devices, at least one of said plurality of units having a reception device, each unit communicating with a maintenance device (SP), one or more of said units (U1) being removably connected to said bus, said system being characterized in that each of said removable units (U1) includes first means (4) controlled selectively by said maintenance device (SP) to assure the functional isolation of said removable unit (U1) and that said system includes second means (8) controlled by said maintenance device (SP) for causing the reception devices (1) of said units (U1, U2, U3, U4) to shift from a normal mode to an increased immunity mode for reception with an increased immunity to interference, and that upon disconnection or connection of any one of said removable units, said first means of that removable unit is activated by said maintenance device to assure the functional isolation of that removable unit and said second means causes the reception devices of the other of said removable units to shift into the increased immunity mode.
Claim 3
Dependent Claim
122 words
The electronic system as defined by claim 1, characterized in that each of said reception devices includes a receiver (1A) providing a fast reception mode and auxiliary means (1B) associated with said second means and adapted to modify the bandwidth of said reception means so as to provide a slow reception mode, and said second means and said maintenance device (SP) are constructed and arranged to control said auxiliary means to prohibit or authorize said slow mode, said transmission devices (2) including means for controlling the transmission devices (2) to function in a slow mode during the functioning of the slow mode of the receiver (1B) and in a fast mode during the functioning of the fast mode of the receivers (1A).
Claim 4
Dependent Claim
84 words
The electronic system defined by claim 2, characterized in that it includes a clock (H) furnishing signals (h) for synchronization of the signals carried by said bus (B), and said clock (H) being constructed and arranged to function at a standard frequency or at a lower frequency under the control of the maintenance device (SP), wherein the functioning of the clock at the standard frequency or the lower frequency corresponds to the mode of fast or slow operation, respectively, of the transmission devices (2).
Claim 5
Dependent Claim
59 words
The electronic system defined by claim 3, characterized in that each fast receiver (1A) includes an inverter (N4, N5, P4, P5) with three states, and that each auxiliary means (1B) includes a Schmitt trigger (N1, N2, N3, P1, P2, P3) with three states, a high-impedance state of the inverter or Schmitt trigger being controlled by said maintenance device (SP).
Claim 6
Dependent Claim
42 words
The electronic system defined by claim 4, characterized in that said Schmitt trigger (N1, N2, N3, P1, P2, P3) is a circuit dimensioned such as to introduce a sufficiently long time constant to filter the interference likely to affect the signals received.
Claim 7
Dependent Claim
76 words
The electronic system defined by claim 5, characterized in that each removable unit (U1) is connected to said bus via a connector (7A, 7B) having function pins, that the transmitter devices (2) of the removable units U1) are three-state transmitters, and that each removable unit (U1) includes control means (9, 10) for setting said transmitters (2) to a high-impedance state during the operations of connection or disconnection of the functional pins of said connector (7A, 7B).
Claim 8
Dependent Claim
96 words
The electronic system defined by claim 6, characterized in that said connector includes a male body (7A) including at least one ground in (MM) and one voltage pin (MP) and a plurality of other pins, said ground pin and said voltage pin being longer than the other pins (MA, MB, MS) of said connector, and that said control means (9, 10) for setting the transmitters (2) to the high-impedance state control the setting of the transmitters to the high-impedance state as a function of the voltage present at the terminals of said long pins (MM, MP).
Claim 9
Dependent Claim
21 words
The electronic system defined by claim 7, characterized in that said ground pin (MM) is longer than said voltage pin (MP).
Claim 10
Dependent Claim
76 words
The electronic system defined by claim 2, characterized in that each removable unit (U1) is connected to said bus via a connector (7A, 7B) having functions pins, that the transmitter device (2) of the removable units (U1) are three-state transmitters, and that each removable unit (U1) includes control means (9, 10) for setting said transmitters (2) to a high-impedance state during the operations of connection or disconnection of the functional pins of said connector (7A, 7B).
Claim 11
Dependent Claim
96 words
The electronic system defined by claim 9, characterized in that said connector includes a male body (7A) including at least one ground pin (MM) and one voltage pin (MP) and a plurality of other pins, said ground pin and said voltage pin being longer than the other pins (MA, MB, MS) of said connector, and that said control means (9, 10) for setting the transmitters (2) to the high-impedance state control the setting of the transmitters to the high-impedance state as a function of the voltage present at the terminals of said long pins (MM, MP).
Claim 12
Dependent Claim
21 words
The electronic system defined by claim 10, characterized in that said ground pin (MM) is longer than said voltage pin (MP).
Claim 13
Dependent Claim
37 words
The electronic system defined by claim 11, characterized in that supply terminals (UA, U) of the circuits (17A, 17B) belonging to each removable unit (U1) are connected respectively to said longer pins via filtering means (16, C).
Claim 14
Dependent Claim
37 words
The electronic system defined by claim 12, characterized in that said supply structure includes a ground plane (5) and a potential plane (6), connected respectively to said longer pins (MM, MP) via a current limiter circuit (16).
Claim 15
Dependent Claim
76 words
The electronic system defined by claim 3, characterized in that each removable unit (U1) is connected to said bus via a connector (7A, 7B) having function pins, that the transmitter devices (2) of the removable units (U1) are three-state transmitters, and that each removable unit (U1) includes control means (9, 10) for setting said transmitters (2) to a high-impedance state during the operations of connection or disconnection of the functional pins of said connector (7A, 7B).
Claim 16
Dependent Claim
96 words
The electronic system defined by claim 14, characterized in that said connector includes a male body (7A) including at least one ground pine (MM) and one voltage pin (MP) and a plurality of other pins, said ground pin and said voltage pin being longer than the other pins (MA, MB, MS) of said connector, and that said control means (9, 10) for setting the transmitters (2) to the high-impedance state control the setting of the transmitters to the high-impedance state as a function of the voltage present at the terminals of said long pins (MM, MP).
Claim 17
Dependent Claim
21 words
The electronic system defined by claim 15, characterized in that said ground pin (MM) is longer than said voltage pin (MP).
Claim 18
Dependent Claim
76 words
The electronic system defined by claim 4, characterized in that each removable unit (U1) is connected to said bus via a connector (7A, 7B) having function pins, that the transmitter devices (2) of the removable units (U1) are three-state transmitters, and that each removable unit (U1) includes control means (9, 10) for setting said transmitters (2) to a high-impedance state during the operations of connection or disconnection of the functional pins of said connector (7A, 7B).
Claim 19
Dependent Claim
96 words
The electronic system defined by claim 17, characterized in that said connector includes a male body (7A) including at least one ground pin (MM) and one voltage pin (MP) and a plurality of other pins, said ground pin and said voltage pin being longer than the other pins (MA, MB, MS) of said connector, and that said control means (9, 10) for setting the transmitters (2) to the high-impedance state control the setting of the transmitters to the high-impedance state as a function of the voltage present at the terminals of said long pins (MM, MP).
Claim 20
Dependent Claim
21 words
The electronic system defined by claim 18, characterized in that said ground pin (MM) is longer than said voltage pin (MP).
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-04-12 | 1996-10-12 | 1997-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-04-12 | 2000-10-12 | 2001-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-04-12 | 2004-10-12 | 2005-04-13 | $7700.00 | Window Closed / Lapsed |