Circuit arrangement and apparatus for non-contacting reference value prescription for an integrated circuit enveloped within non-magnetic material

• US 5,003,363 A
• Filed: 01/30/1990
• Issued: 03/26/1991
• Est. Priority Date: 03/17/1989
• Status: Expired due to Term

• Current Assignee: Siemens AG
• Original Assignee: Siemens AG
• Inventors: Lachmann, Ulrich
• Primary Examiner(s): Hille, Rolf
• Assistant Examiner(s): Ho, Tan
• Application Number:
  US07/472,654
• Time in Patent Office: 420 Days
• Field of Search: 357/27, 357/74, 357/75, 338/32 R, 338/32 H
• US Class Current: 338/32.00H
• CPC Class Codes: H10B 61/00 Magnetic memory devices, e.g. magnetoresistive RAM [MRAM] devices
• CPC Class Codes: H10N 59/00 Integrated devices, or assemblies of multiple devices, comprising at least one galvanomagnetic or Hall-effect element covered by groups H10N50/00 - H10N52/00 MRAM devices H10B61/00

Abstract

An integrated circuit is encased in non-magnetic material and electrically connected to a Hall sensor. A permanent magnet is mounted for movement with respect to the Hall sensor to cause the Hall sensor to produce an output signal for setting a reference value.

Claims

1. The combination of a circuit arrangement and an apparatus for non-contacting reference value prescription of an integrated circuit of the circuit arrangement which is enveloped with non-magnetic material, the function of said circuit arrangement being controlled by at least one control signal, said combination comprising:

at least one Hall sensor completely encapsulated within said non-magnetic material and electrically connected to said integrated circuit, said Hall sensor generating said at least one control signal; and

a permanent magnet mounted for movement adjacent and with respect to said Hall sensor.

2. The combination of claim 1, wherein:

said permanent magnet is mounted on an axis parallel to and is movable parallel to said at least one Hall sensor.

3. The combination of claim 1, wherein:

said permanent magnet is mounted on an axis and is movable on said axis perpendicular to said at least one Hall sensor.

4. The combination of claim 1, wherein:

said permanent magnet is an annular permanent magnet mounted for rotation about an axis and comprises a non-magnetic peripheral gap.

5. The combination of claim 1, wherein:

a plurality of said Hall sensors is provided and enveloped within said non-magnetic material and electrically connected to said integrated circuit, each of said Hall sensors operable to generate a respective control signal.

6. The combination of a circuit arrangement including an integrated circuit and an envelope of non-magnetic material encasing said integrated circuit and electrical contacts extending through said non-magnetic envelope, and apparatus for non-contacting reference value prescription for said integrated circuit, the function of said circuit arrangement being controlled by at least one control signal, said combination comprising:

a Hall sensor mounted within and fully enveloped by said envelope and electrically connected to said integrated circuit, said Hall sensor generating said at least one control signal; and

a permanent magnet mounted for movement adjacent said Hall sensor.