# US 8,570,769 B2 · Bidirectional signal conversion

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 8,570,769 B2
- Document ID: US8570769B2
- Status: Granted
- Kind: B2
- Application number: 12/899,800
- Filed: 2010-10-07
- Published: 2011-06-23
- Granted: 2013-10-29
- Earliest claimed: 2009-12-21
- Assignees: Intersil Americas Inc.
- Applicants: Zaki Moussaoui; Jifeng Qin
- Inventors: Zaki Moussaoui; Jifeng Qin
- Web page: https://patentgrep.com/patent/US8570769B2

## CPC

- H02M 3/33584: {Bidirectional converters}
- H02M: APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF (transformers H01F; dynamo-electric converters H02K47/00; controlling transformers, reactors or choke coils, control or regulation of electric motors, generators or dynamo-electric converters H02P)

## Abstract

An embodiment of a controller for a multidirectional signal converter is operable to cause the converter to regulate a first signal at a first converter node, and to have a switch timing that is independent of a direction of power transfer between the first converter node and a second converter node. For example, in an embodiment, such a controller may be part of a bidirectional voltage converter that handles power transfer between two loads. Such a voltage converter may have improved conversion efficiency and a smaller size and lower component count as compared to a conventional multidirectional voltage converter. Furthermore, such a voltage converter may be operable with a common switching scheme regardless of the direction of power transfer, and without the need for an indicator of the instantaneous direction of power flow.

## Claims

### Claim 1

A controller, comprising:
circuitry configured to cause a bidirectional signal converter:
to regulate a first signal at a first converter node that is coupled to at least a first winding of at least one transformer without a DC blocking capacitor; and
to have a switch timing that is independent of a direction of power transfer between the first converter node and a second converter node that is coupled to at least a second winding of the at least one transformer without DC blocking capacitor.

### Claim 2 (depends on 1)

The controller of claim 1 wherein the circuitry is further configured to cause the bidirectional signal converter to regulate the first signal to have a first level that is different than a second level of a second signal at the second converter node.

### Claim 3 (depends on 1)

The controller of claim 1 wherein the circuitry is further configured to cause the bidirectional signal converter to regulate the first signal to have a first level that is higher than a second level of a second signal at the second converter node.

### Claim 4 (depends on 1)

The controller of claim 1 wherein the circuitry is further configured to cause a first stage of the bidirectional signal converter that is coupled to the first converter node to operate as a signal rectifier while the direction of power transfer is from the second converter node to the first converter node.

### Claim 5 (depends on 1)

The controller of claim 1 wherein the circuitry is further configured to cause a first stage of the bidirectional signal converter that is coupled to the first converter node to be synchronized with a second stage of the bidirectional signal converter that is coupled to the second converter node.

### Claim 6 (depends on 1)

The controller of claim 1 wherein the circuitry is further configured to cause a first stage of the bidirectional signal converter that is coupled to the first converter node to operate as an alternating-signal source while the direction of power transfer is from the first converter node to the second converter node.

### Claim 7 (depends on 1)

The controller of claim 1 wherein the circuitry is further configured to cause a first stage of the bidirectional signal converter that is coupled to the first converter node to operate as a multiphase alternating-signal source while the direction of power transfer is from the first converter node to the second converter node.

### Claim 8 (depends on 1)

The controller of claim 1 wherein the circuitry is further configured to cause a first stage of the bidirectional signal converter that is coupled to the first converter node to operate as an alternating-signal source with fewer than all of multiple phases active while the direction of power transfer is from the first converter node to the second converter node.

### Claim 9 (depends on 1)

The controller of claim 1 wherein the circuitry is further configured to cause a first stage of the bidirectional signal converter that is coupled to the first converter node to operate as a signal divider while the direction of power transfer is from the first converter node to the second converter node.

### Claim 10 (depends on 1)

The controller of claim 1 wherein the circuitry is further configured to cause a first stage of the bidirectional signal converter that is coupled to the first converter node to operate as a multiphase signal divider while the direction of power transfer is from the first converter node to the second converter node.

### Claim 11 (depends on 1)

The controller of claim 1 wherein the circuitry is further configured to cause a first stage of the bidirectional signal converter that is coupled to the first converter node to operate as a signal divider with fewer than all of multiple phases active while the direction of power transfer is from the first converter node to the second converter node.

### Claim 12 (depends on 1)

The controller of claim 1 wherein the circuitry is further configured to cause a first stage of the bidirectional signal converter that is coupled to the first converter node to operate as a signal multiplier while the direction of power transfer is from the second converter node to the first converter node.

### Claim 13 (depends on 1)

The controller of claim 1 wherein the circuitry is further configured to cause a first stage of the bidirectional signal converter that is coupled to the first converter node to operate as a signal multiplier with fewer than all of multiple phases active while the direction of power transfer is from the second converter node to the first converter node.

### Claim 14 (depends on 1)

The controller of claim 1 wherein the circuitry is further configured to cause a second stage of the bidirectional signal converter that is coupled to the second converter node to operate as a buck converter while the direction of power transfer is from the first converter node to the second converter node.

### Claim 15 (depends on 1)

The controller of claim 1 wherein the circuitry is further configured to cause a second stage of the bidirectional signal converter that is coupled to the second converter node to operate as a boost converter while the direction of power transfer is from the second converter node to the first converter node.

### Claim 16 (depends on 1)

The controller of claim 1 wherein the circuitry is further configured to cause a second stage of the bidirectional signal converter that is coupled to the second converter node to operate as a multiphase buck converter while the direction of power transfer is from the first converter node to the second converter node.

### Claim 17 (depends on 1)

The controller of claim 1 wherein the circuitry is further configured to cause a second stage of the bidirectional signal converter that is coupled to the second converter node to operate as a multiphase boost converter while the direction of power transfer is from the second converter node to the first converter node.

### Claim 18 (depends on 1)

The controller of claim 1 wherein the circuitry is further configured to cause a second stage of the bidirectional signal converter that is coupled to the second converter node to operate as a buck converter with fewer than all of multiple phases active while the direction of power transfer is from the first converter node to the second converter node.

### Claim 19 (depends on 1)

The controller of claim 1 wherein the circuitry is further configured to cause a second stage of the bidirectional signal converter that is coupled to the second converter node to operate as a boost converter with fewer than all of multiple phases active while the direction of power transfer is from the second converter node to the first converter node.

### Claim 20 (depends on 1)

The controller of claim 1 wherein the circuitry is further configured to cause a second stage of the bidirectional signal converter that is coupled to the second converter node to operate as a current multiplier while the direction of power transfer is from the first converter node to the second converter node.

### Claim 21 (depends on 1)

The controller of claim 1 wherein the circuitry is further configured to cause a second stage of the bidirectional signal converter that is coupled to the second converter node to operate as a current multiplier with fewer than all of multiple phases active while the direction of power transfer is from the first converter node to the second converter node.

### Claim 22 (depends on 1)

The controller of claim 1 wherein the circuitry is further configured to cause at least one switch circuit of the bidirectional signal converter to transition between switch states while there is approximately zero volts across the switch circuit.

### Claim 23 (depends on 1)

The controller of claim 1 wherein the circuitry is further configured to cause at least one switch circuit of the bidirectional signal converter to transition between switch states while there is no more than approximately a diode voltage drop across the switch circuit.

### Claim 24 (depends on 1)

The controller of claim 1 wherein the circuitry is further configured to cause at least one switch circuit of the bidirectional signal converter to transition between switch states while there is approximately zero current flowing through the switch circuit.

### Claim 25 (depends on 1)

The controller of claim 1 wherein the circuitry is configured to receive no-power-transfer-direction signal.