Bi-directional optical transceiver

• US 5,122,893 A
• Filed: 12/20/1990
• Issued: 06/16/1992
• Est. Priority Date: 12/20/1990
• Status: Expired due to Term

• Current Assignee: Hewlett-Packard Development Company, L.P. (HP Inc.)
• Original Assignee: Compaq Computer Corporation (HP Inc.)
• Inventors: Tolbert, Cloys G.
• Primary Examiner(s): Coles, Sr., Edward L.
• Assistant Examiner(s): NEGASH, KINFE MICHAEL
• Application Number:
  US07/633,219
• Time in Patent Office: 544 Days
• Field of Search: 455/606, 455/607, 455/613, 250/316.1, 359/152, 359/154
• US Class Current: 398/135
• CPC Class Codes: H01L 2224/48137 the bodies being arranged next to each other, e.g. on a common substrate
• CPC Class Codes: H01L 2224/48247 connecting the wire to a bond pad of the item
• CPC Class Codes: H01L 2224/49171 Fan-out arrangements
• CPC Class Codes: H01L 2924/00 Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
• CPC Class Codes: H01L 2924/1815 Shape
• CPC Class Codes: H04B 10/40 Transceivers

Abstract

A bi-directional optical transceiver which provides bi-directional translation between optical and electrical signals. The transceiver includes an LED, a photodiode, and a transimpedance preamplifier which are mounted onto a single base to provide the bi-directional translation. The photodiode receives optical signals and, in conjunction with the preamplifier, produces corresponding electrical signals, and the LED receives electrical signals and produces corresponding optical signals.

Claims

1. A bi-directional optical transceiver, comprising:

a single, generally planar base means comprised of a ceramic substrate;

means mounted on said base means for receiving a first electrical signal and for producing a corresponding first optical signal;

means mounted on said base means adjacent said first electrical signal receiving and first optical signal producing means for receiving a second optical signal and for producing a corresponding second electrical signal;

a housing containing said base means, said first electrical signal receiving and first optical signal producing means, and said second optical signal receiving and second electrical signal producing means, said housing including a cavity located over said base means and having tapered sides;

a lens element set into said housing cavity having a first lens located adjacent said first electrical signal receiving and first optical signal producing means which receives said first optical signal from said first electrical signal receiving and first optical signal producing means and transmits said first optical signal and a second lens located adjacent said second optical signal receiving and second electrical signal producing means which receives said second optical signal and provides said second optical signal to said second optical signal receiving and second electrical signal producing means.

2. The bi-directional optical transceiver of claim 1, further comprising:

a lead frame connected to said base means having a first pin which receives said first electrical signal and provides said first electrical signal to said first electrical signal receiving and first optical signal producing means and a second pin which receives said second electrical signal from said second optical signal receiving and second electrical signal producing means and transmits said second electrical signal.

3. The bi-directional optical transceiver of claim 2, the lead frame further including a third pin which is designated for connection to a voltage supply and a fourth pin designated for connection to a logical ground.

4. The bi-directional optical transceiver of claim 1, wherein said first electrical signal receiving and first optical signal producing means comprises a light emitting diode.

5. The bi-directional optical transceiver of claim 4, wherein said second optical signal receiving and second electrical signal producing means includes a photodiode.

6. The bi-directional optical transceiver of claim 5, wherein said second optical signal receiving and second electrical signal producing means further includes an amplifier means;

wherein said photodiode receives said second optical signal and produces an electrical signal corresponding to the amount of said second optical signal received; and

wherein said amplifier means receives said electrical signal from said photodiode and produces said second electrical signal in proportion to said electrical signal produced by said photodiode.