Transmitter for operating multiple devices

• US 7,899,130 B2
• Filed: 08/18/2006
• Issued: 03/01/2011
• Est. Priority Date: 07/09/2002
• Status: Active Grant

• Current Assignee: Philip Y.W. Tsui
• Original Assignee: Philip Y.W. Tsui
• Inventors: Tsui, Philip Y. W.
• Primary Examiner(s): Ghebretinsae; Temesghen
• Application Number:
  US11/506,488
• Publication Number:
  US 20070036230A1
• Time in Patent Office: 1,656 Days
• Field of Search: 375/344, 375/219, 375/295, 340/825, 340/69, 340/825.71, 340/825.72, 455/151.1, 455/151.2, 455/69
• US Class Current: 375/295
• CPC Class Codes: H04L 25/4902 Pulse width modulation; Pulse position modulation
• CPC Class Codes: H04L 27/0008 arrangements for allowing a transmitter or receiver to use more than one type of modulation negotiating modulation type for two-way transmission paths H04L5/1453
• CPC Class Codes: H04L 27/10 Frequency-modulated carrier systems, i.e. using frequency-shift keying H04L27/32 takes precedence
• CPC Class Codes: H04L 5/1453 of modulation type

Abstract

A transmitter that is programmable to transmit one or more identification or device codes, using one or more transmission formats, at one or more transmission frequencies to control one or more respective devices. In one embodiment, the transmitter includes a controller and memory for storing transmission values and corresponding transmission frequencies, where the transmission values may include multiple device codes and transmission formats. A subset of the transmission values and corresponding transmission frequencies stored in the memory are assigned to or associated with one or more actuation switches upon matching the transmission values in a sampled signal to a set of transmission values stored in memory. In one embodiment, the transmission values may correspond to either a fixed-code transmission format or a rolling-code transmission format.

Claims

1. A transmitter, comprising:

a first switch;

a memory containing a plurality of stored transmission formats and a separate plurality of pre-selected transmission frequencies;

a receiving circuit for receiving a sample signal having a sample transmission format and a sample transmission frequency; and

a controller coupled to the first switch, the memory and the receiving circuit, said controller to,

compare the sample transmission format to each of the plurality of stored transmission formats,

associate the first switch with a particular transmission format of the plurality of stored transmission formats when the sample transmission format matches the particular transmission format,

compare the sample transmission frequency to the plurality of pre-selected transmission frequencies, and

associate the first switch with a particular transmission frequency of the plurality of pre-selected transmission frequencies when the sample transmission frequency matches the particular transmission frequency,

wherein the controller compares the sample transmission format to each of the plurality of stored transmission formats separately from comparing the sample transmission frequency to the plurality of pre-selected transmission frequencies, such that the first switch may be associated with one of the plurality of stored transmission formats independent of being associated with any one of the plurality of pre-selected transmission frequencies.

2. A transmitter, comprising:

a first switch;

a memory containing a plurality of stored transmission formats and a separate plurality of pre-selected transmission frequencies;

a receiving circuit for receiving a sample signal having a sample transmission format and a sample transmission frequency; and

a controller coupled to the first switch, the memory and the receiving circuit, said controller to,

compare the sample transmission format to each of the plurality of stored transmission formats,

associate the first switch with a particular transmission format of the plurality of stored transmission formats when the sample transmission format matches the particular transmission format,

compare the sample transmission frequency to the plurality of pre-selected transmission frequencies, and

associate the first switch with a particular transmission frequency of the plurality of pre-selected transmission frequencies when the sample transmission frequency matches the particular transmission frequency,

wherein the controller further includes an output buffer for storing an activation signal, wherein the activation signal is characterized by the particular transmission format and the particular transmission frequency, and

wherein the controller is further to perform a bit verification operation on the activation signal, which includes checking each bit in the activation signal to determine if they are positive, neutral or negative bits.

3. The transmitter of claim 2, wherein the bit verification operation is used to select one of a positive, neutral or negative transmission timing for a corresponding positive, neutral or negative bit of the activation signal.

4. A transmitter for operating a plurality of receivers, comprising:

a user input;

a memory containing a plurality of stored transmission formats and a separate plurality of pre-selected transmission frequencies, wherein both the plurality of stored transmission formats and plurality of pre-selected transmission frequencies include fixed values for operating both fixed-code type receivers and for rolling-code type receivers;

a receiving circuit for receiving a sample signal having a sample transmission format and a sample transmission frequency; and

a controller coupled to the user input, the memory and the receiving circuit, said controller to,

compare the sample transmission format to each of the plurality of stored transmission formats,

associate the user input with a particular transmission format of the plurality of stored transmission formats when the sample transmission format matches the particular transmission format,

compare the sample transmission frequency to the plurality of pre-selected transmission frequencies, and

associate the user input with a particular transmission frequency of the plurality of pre-selected transmission frequencies when the sample transmission frequency matches the particular transmission frequency,

wherein the controller compares the sample transmission format to each of the plurality of stored transmission formats separately from comparing the sample transmission frequency to the plurality of pre-selected transmission frequencies, such that the first switch may be associated with one of the plurality of stored transmission formats independent of being associated with any one of the plurality of pre-selected transmission frequencies.

5. A transmitter for operating a plurality of receivers, comprising:

a user input;

a memory containing a plurality of stored transmission formats and a separate plurality of pre-selected transmission frequencies, wherein both the plurality of stored transmission formats and plurality of pre-selected transmission frequencies include fixed values for operating both fixed-code type receivers and for rolling-code type receivers;

a receiving circuit for receiving a sample signal having a sample transmission format and a sample transmission frequency; and

a controller coupled to the user input, the memory and the receiving circuit, said controller to,

compare the sample transmission format to each of the plurality of stored transmission formats, and

associate the user input with a particular transmission format of the plurality of stored transmission formats when the sample transmission format matches the particular transmission format,

wherein the controller further includes an output buffer for storing an activation signal characterized by the particular transmission format, and

wherein the controller is further to perform a bit verification operation on the activation signal, which includes checking each bit in the activation signal to determine if they are positive, neutral or negative bits.

6. The transmitter of claim 5, wherein the bit verification operation is used to select one of a positive, neutral or negative transmission timing for a corresponding positive, neutral or negative bit of the activation signal.

7. A method for operating a plurality of receivers, comprising:

storing in a memory a plurality of stored transmission formats and a separate plurality of pre-selected transmission frequencies, wherein both the plurality of stored transmission formats and plurality of pre-selected transmission frequencies include fixed values for operating both fixed-code type receivers and for rolling-code type receivers;

receiving a sample signal having a sample transmission format and a sample transmission frequency;

comparing the sample transmission format to each of the plurality of stored transmission formats;

associating a user input with a particular transmission format of the plurality of stored transmission formats when the sample transmission format matches the particular transmission format;

comparing the sample transmission frequency to the plurality of pre-selected transmission frequencies;

associating the user input with a particular transmission frequency of the plurality of pre-selected transmission frequencies when the sample transmission frequency matches the particular transmission frequency; and

comparing the sample transmission format to each of the plurality of stored transmission formats separately from comparing the sample transmission frequency to the plurality of pre-selected transmission frequencies, such that the first switch may be associated with one of the plurality of stored transmission formats independent of being associated with any one of the plurality of pre-selected transmission frequencies.

8. A method for operating a plurality of receivers, comprising:

storing in a memory a plurality of stored transmission formats and a separate plurality of pre-selected transmission frequencies, wherein both the plurality of stored transmission formats and plurality of pre-selected transmission frequencies include fixed values for operating both fixed-code type receivers and for rolling-code type receivers;

receiving a sample signal having a sample transmission format and a sample transmission frequency;

comparing the sample transmission format to each of the plurality of stored transmission formats;

associating the user input with a particular transmission format of the plurality of stored transmission formats when the sample transmission format matches the particular transmission format; and

performing a bit verification operation on an activation signal characterized by the particular transmission format, wherein the bit verification operation includes checking each bit in the activation signal to determine if they are positive, neutral or negative bits.

9. The method of claim 8, wherein the bit verification operation comprises selecting one of a positive, neutral or negative transmission timing for a corresponding positive, neutral or negative bit of the activation signal.