Electronic circuit assembly an a substrate containing programmable switches

• US 5,479,055 A
• Filed: 10/15/1993
• Issued: 12/26/1995
• Est. Priority Date: 10/31/1992
• Status: Expired due to Fees

• Current Assignee: Smiths Industries Public Limited Company
• Original Assignee: Smiths Industries Public Limited Company
• Inventors: Eccles, Edward S.
• Primary Examiner(s): Shoop, Jr., William M.
• Assistant Examiner(s): PALADINI, ALBERT WILLIAM
• Application Number:
  US08/136,244
• Time in Patent Office: 802 Days
• Field of Search: 340/825, 340/166, 340/718, 340/713, 340/825, 350/502, 29/846
• US Class Current: 307/38
• CPC Class Codes: G06F 11/20 using active fault-masking, e.g. by switching out faulty elements or by switching in spare elements
• CPC Class Codes: H01L 27/118 Masterslice integrated circuits

Abstract

An electronic assembly has a substrate with several conductive tracks and with a switching matrix within the thickness of the substrate. Several groups of identical integrated circuits are mounted on the substrate, one circuit from each group being operatively connected into the assembly by the switching matrix. A processor detects malfunction of a circuit and controls the switching matrix to disconnect that circuit and operatively connect into the assembly an alternative circuit from the same group.

Claims

1. An electronic assembly comprising:

a substrate, said substrate having a plurality of conductive tracks;

a plurality of electronic circuit devices;

means mounting the electronic devices on the substrate in electrical connection therewith;

a memory storing information as to which devices are operatively connected into the assembly; and

a plurality of reprogrammable switches within the substrate by which connection of said devices with the tracks can be changed.

2. An electronic assembly according to claim 1, wherein only some of the devices are operatively connected in the assembly at any time.

3. An electronic assembly according to claim 1, including a processor connected to detect malfunction of the devices.

4. An electronic assembly according to claim 3, wherein some at least of the electronic devices are identical with one another, and wherein said processor controls operation of the switches to disconnect a malfunctioning device and to switch an alternative device into operative connection.

5. An electronic assembly according to claim 4, wherein the assembly includes several groups of devices, wherein the devices within a group are identical to one another, and wherein the devices of one group differ in function from the devices of another group.

6. An electronic assembly according to claim 5, wherein the number of identical devices within a group differs from group to group according to the relative reliability of the devices.

7. An electronic assembly according to claim 5, wherein the number of identical devices within a group differs from group to group according to how critical the devices are to operation of the assembly.

8. An electronic assembly according to claim 1, wherein said memory stores information as to any devices that have been previously operatively disconnected from the assembly.

9. An electronic assembly according to claim 3, wherein the assembly includes a plurality of devices that perform different functions, a plurality of devices of identical construction, and a processor operates to program the devices of identical construction to perform different functions so that they can be operatively connected into the assembly to replace the said devices that perform different functions.

10. An electronic assembly according to any one of claims 1, 2-7, 8 and 9, wherein the switches comprise a switching matrix located in a region of the substrate that extends at least partially beneath the devices.

11. An electronic assembly comprising:

a substrate having a plurality of conductive tracks;

a plurality of groups of electronic devices, the devices in a group being identical with one another;

means mounting the electronic devices on the substrate;

a plurality of reprogrammable switches within the substrate by which one of the devices in each group is connected via the tracks into operative connection in the assembly;

a memory storing information as to which of said devices are operatively connected into the assembly and which of said devices have previously been operatively disconnected from the assembly; and

a processor responsive to a malfunction of a device to reprogram the switches to connect an alternative device from the same group, not previously disconnected, into operative connection.