Transformer based voltage supply

• US 8,093,979 B2
• Filed: 06/11/2010
• Issued: 01/10/2012
• Est. Priority Date: 12/09/2003
• Status: Expired due to Fees

• Current Assignee: Snaptrack Incorporated (Qualcomm, Inc.)
• Original Assignee: Nujira Limited (Qualcomm, Inc.)
• Inventors: Wilson, Martin Paul
• Primary Examiner(s): NGUYEN, TUYEN T
• Application Number:
  US12/813,740
• Publication Number:
  US 20100253460A1
• Time in Patent Office: 578 Days
• Field of Search: 336180-184, 336/170, 336/173
• US Class Current: 336/170
• CPC Class Codes: H01F 30/16 Toroidal transformers
• CPC Class Codes: H01F 38/00 Adaptations of transformers or inductances for specific applications or functions
• CPC Class Codes: H02M 7/49 Combination of the output voltage waveforms of a plurality of converters
• CPC Class Codes: H03F 1/02 Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation
• CPC Class Codes: H03F 2200/204 A hybrid coupler being used at the output of an amplifier circuit

Abstract

There is disclosed a voltage summer including a transformer having a primary side and a secondary side, wherein a first voltage to be summed is connected to the primary side and a second voltage to be summed is connected to the secondary side. There is further disclosed a transformer comprising a primary winding and a secondary winding and having a turns ratio of primary winding to secondary winding of x:y, providing x turns in series in the primary winding and providing y turns in series in the secondary winding; providing an equal number of turns in the primary and secondary windings; and closely coupling each primary winding turn with a secondary winding turn.

Claims

1. A transformer including:

a) a plurality of primary windings i, each having xi turns in series, and a secondary winding having y turns in series;

b) each turn of each primary winding closely coupled with a turn of each other primary winding; and

c) each primary winding turn closely coupled with a secondary winding turn.

2. A transformer according to claim 1 wherein the closely coupled turns are coupled in parallel.

3. A transformer according to claim 1 wherein the number of turns in each of the primary and secondary winding is x*y.

4. A transformer according to claim 3 wherein there is provided y parallel branches in the primary winding, each with x turns.

5. A transformer according to claim 3, wherein there is provided x parallel branches in the secondary winding, each with y turns.

6. A transformer according to claim 3, wherein there is provided p branches in the primary winding, the number of turns in the primary winding being p*x*y.

7. A transformer according to claim 6 wherein there is provided p*x branches in the secondary winding.

8. A transformer according to claim 3 wherein there is an equal number of turns in each parallel branch.

9. A transformer according to claim 6 wherein the number of branches in the primary winding is y*p, the number of branches in the secondary winding being x*p.

10. A transformer according to claim 9 in which the number of turns in the primary and secondary winding is the lowest common multiple of x_i*y for all i.

11. A transformer according to claim 10 in which the lowest common multiple is t, the number of branches in each primary winding being t/x_i, each having x_i turns.

12. A transformer according to claim 11 in which the number of branches in the secondary winding is t/y, each having y turns.

13. A transformer according to claim 9, wherein there is provided p_i branches in each primary winding, the number of turns in each primary winding being p_i*x_i*y.

14. A transformer comprising a plurality i of primary windings and a secondary winding and having a turns ratio of primary winding to secondary winding of x_i:

y, the transformer including;

a) x_i turns in series in each primary winding i and y turns in series in the secondary winding;

b) an equal number of turns in each primary and secondary windings; and

c) each primary winding turn being closely coupled with a turn of every other primary winding and with a secondary winding turn.