Wireless diffuse infrared LAN system

• US 5,724,168 A
• Filed: 10/11/1994
• Issued: 03/03/1998
• Est. Priority Date: 10/11/1994
• Status: Expired due to Term

• Current Assignee: Innsmouth LLC (Intellectual Ventures LLC)
• Original Assignee: Spectrix Corp.
• Inventors: Welch, Jeffrey Peter, Oschmann, Ellen L.
• Primary Examiner(s): Boudreau, Leo
• Assistant Examiner(s): MEHTA, BHAVESH M
• Application Number:
  US08/322,016
• Time in Patent Office: 1,239 Days
• Field of Search: 359/118, 359/152, 359/188, 359/189, 359/172, 359/161, 359/159, 330/308, 330/59, 250/214 A, 250/551, 250/349
• US Class Current: 398/127
• CPC Class Codes: H03F 3/087 with IC amplifier blocks H03F3/085 takes precedence
• CPC Class Codes: H04B 10/1149 Arrangements for indoor wireless networking of information
• CPC Class Codes: H04B 10/40 Transceivers

Abstract

A wireless diffuse infrared local area network communication system is provided for enclosed areas. The communication system includes a controller and a substantially omnidirectional infrared transceiver disposed on an inside walls of the enclosed area operatively interconnected with the controller. The system further includes a remote station and means, operatively coupled to the remote station, for transceiving a communicated signal with the substantially omnidirectional infrared transceiver.

Claims

1. A wireless diffuse infrared communication system for enclosed areas comprising:

a controller;

a substantially omnidirectional diffuse infrared transceiver disposed inside the enclosed area, operatively interconnected with the controller and simultaneously transmitting a diffuse infrared signal throughout the enclosed area;

a portable remote station; and

a floating photodiode amplifier circuit disposed within the remote station, for transceiving the diffuse communicated signal with the substantially omnidirectional diffuse infrared transceiver.

2. A wireless diffuse infrared communication system for enclosed areas comprising:

a controller;

a substantially .omnidirectional diffuse infrared transceiver disposed inside the enclosed area operatively interconnected with the controller, including a photodiode for receiving diffuse infrared information, an radio frequency shield disposed over, and substantially enclosing the photodiode, and a floating photodiode amplifier operably interconnected with the photodiode;

a portable remote station; and

means disposed within the remote station for tranceiving a diffuse communicated signal with the substantially omnidirectional diffuse infrared transceiver, including a photodiode for receiving diffuse infrared information, an radio frequency shield disposed over, and substantially enclosing the photodiode, and a floating photodiode amplifier operably interconnected with the photodiode.

3. A wireless diffuse infrared communication system for enclosed areas comprising:

a controller;

a substantially omnidirectional diffuse infrared transceiver disposed inside the enclosed area, operatively interconnected with the controller and simultaneously transmitting a diffuse infrared signal throughout the enclosed area;

a portable remote station;

a shielded photodiode shielded from radio frequency interference disposed in the portable remote station; and

a floating photoconductor amplifier coupled to the shielded photodiode.

4. A wireless diffuse infrared communication system for enclosed areas comprising:

a controller;

a substantially omnidirectional diffuse infrared transceiver disposed inside the enclosed area, operatively interconnected with the controller and simultaneously transmitting a diffuse infrared signal throughout the enclosed area;

a first photodiode having an anode and a cathode disposed within the omnidirectional diffuse infrared transceiver; and

a first non-inverting amplifier of substantially unity gain, with an input of the first non-inverting amplifier operably coupled with the cathode of the first photodiode through a coupling capacitor and an output of the first non-inverting amplifier operably coupled to an anode of the first photodiode;

a portable remote station;

a second photodiode having an anode and a cathode disposed within the portable remote station; and

a second non-inverting amplifier of substantially unity gain, with an input of the second non-inverting amplifier operably coupled with the cathode of the second photodiode through a coupling capacitor and an output of the second non-inverting amplifier operably coupled to an anode of the second photodiode.

5. The system of claim 4 further comprising a feedback resistor interposed within the interconnection between the output of the non-inverting amplifier and the anode of the photodiode.