IC memory card with non-contact power and data connection

• US 5,412,253 A
• Filed: 05/21/1993
• Issued: 05/02/1995
• Est. Priority Date: 04/20/1992
• Status: Expired due to Fees

• Current Assignee: Wayne E. Hough
• Original Assignee: Wayne E. Hough
• Inventors: Hough, Wayne E.
• Primary Examiner(s): Gaffin, Jeffrey A.
• Assistant Examiner(s): GANJIAN, PETER
• Application Number:
  US08/065,868
• Time in Patent Office: 711 Days
• Field of Search: 336/DIG. 2, 336/200, 336/214, 336/215, 307/104, 307/17, 235/380, 235/449, 235/439, 365/52, 365/55, 365/63, 365/66, 29/602.1, 29/605, 29/606, 29/607
• US Class Current: 307/17
• CPC Class Codes: G06F 13/4068 Electrical coupling
• CPC Class Codes: G06K 7/10336 the antenna being of the near field type, inductive coil
• CPC Class Codes: H01F 2038/143 for signals
• CPC Class Codes: H01F 38/14 Inductive couplings for wireless supply or distribution of electric power using inductive coupling H02J50/10

Abstract

A non-contact electrical transformer coupling is disclosed that provides electrical power and full duplex digital communications between a host computer and a removable IC memory card. A unique two-part host magnetic core assembly having a quadrafid design forming multiple poles is provided with printed circuit windings and is disposed to receive the IC memory card embedded with core pole pieces and associated printed circuit card windings to complete the magnetic flux paths and transformer coupling. The configuration of the poles and windings form completely independent channels, each of which behaves like a wide-band ferrite core transformer. The independence of each channel enables this unique magnetic core and associated windings to couple relatively large amounts of power to the circuitry of the IC memory card and establish a high-speed bidirectional data link between the host and card.

Claims

1. A non-contact connector for coupling a removable electronic module with a host device, comprising:

a host transformer core assembly having first and second core parts mounted in fixed spaced relationship with a gap between confronting core part faces, at least one of said first and second core parts having a quadrafid pattern formed on its confronting face to define core poles;

host transformer winding means mounted on said core poles;

a removable electronic module core assembly having a plurality of core pole pieces arranged in a fixed pattern matching the core poles of said host parts quadrafid pattern and being adapted for insertion in said gap between said core part faces to complete magnetic flux paths through said poles of said first and second host core parts and said module pole pieces; and

module transformer winding means mounted on said module core pole pieces so as to be removably transformer coupled to said host winding means via said complete magnetic flux paths.

2. The non-contact connector of claim 1, wherein at least one of said first and second host transformer core parts has four core poles.

3. The non-contact connector of claim 2, wherein said host and module winding means each comprise a set of separate channel windings arranged on said host and module core assemblies so as to form with four poles separate independent channels for data or power transfer between host and module.

4. The non-contact connector of claim 1, wherein said host core poles terminate in a common plane equidistantly spaced from the other host core part and said module pole pieces are in a coplanar array for insertion in said gap.

5. The non-contact connector of claim 4, wherein said poles are arranged in quadrants substantially symmetrical with a midpoint of said first and second host transformer core parts.

6. The non-contact connector of claim 5 comprising host and module interface circuit means associated with said host and module winding means for power and data coupling through power and data flux traversing through said poles of said first and second host transformer core parts and through said module pole pieces in said gap.

7. The non-contact power and data connector of claim 1, further comprising:

mechanical guide means for causing said module pole pieces to be positioned and held in mating relation with said poles of said host core part.

8. The non-contact connector of claim 1, further comprising host interface electronic means including alternating current power signal means and data encoder-decoder means connected to said host winding means.

9. The non-contact connector of claim 1, further comprising module interface electronic means including power rectifier means and data encoder-decoder means connected to said module winding means.

10. The non-contact connector of claim 8, wherein said host and module interface circuit means each comprise data encoding and data decoding means, and wherein said host and module winding means comprise separate independent data channels for full duplex data coupling between said host and module.

11. The non-contact power and data connector of claim 8, wherein said data encoder and data decoder means comprise means for conversion between serial and parallel data.

12. The non-contact connector of claim 10, wherein said host and module winding means each comprise separate write data and read data winding channels.

13. The non-contact connector of claim 1, wherein said module comprises a memory card having an insertion portion on which said pole pieces are fixedly mounted in a substantially coplanar array.

15. The non-contact power and data coupling of claim 13, wherein said removable electronic module is a memory card.

14. A non-contact power and data coupling for a removable electronic module connected with a host device comprising:

host transformer core having separate spaced parts, and formed with coplanar poles that project into a core gap between said separate spaced parts and being adapted for mounting on a host;

module core pole pieces adapted to be fixed in a coplanar array on a removable module for filling said core gap between said host transformer core parts;

primary and secondary power winding means on said host transformer core parts and module core pole pieces, respectively, for causing power flux to traverse through certain of said poles;

first and second sets of primary and secondary data winding means on said host transformer core parts and module core pole pieces for causing first and second independent data channel flux paths to traverse through certain of said poles;

said first and second sets of data winding means being so wound in relation to said poles and said power winding means that said power flux mutually cancels in those poles that couple data flux between said primary and secondary data winding means, and said data channel flux mutually cancels in those poles to maintain said first and second sets of data windings as independent data channels.