Patent US5565672A successfully refreshed from Google Patents.
US5565672A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical transimpedance receiver with compensation network
Assignee: Avago Technologies International Sales Pte Ltd
•
Filing: 1994-12-30
•
Granted: 1996-10-15
•
Expires: 2014-12-30
Abstract
Abstract An apparatus and method is provided that improves the dynamic range of an optical transimpedance receiver. The receiver includes a photodetector, a transimpedance front end amplifier and a non-liner feedback. The non-linear feedback means consists of a Schottky diode and shunting the transimpedance resistor with a parasitic capacitor. A lead compensation network is further included in the feedback circuitry to provide stability to the non-linear circuit by advancing the phase shifting of the transimpedance front end by 45 degrees. By stabilizing the frequency off the circuit, the dynamic range is increased from 26.6 dB to 40 dB.
Inventors
- 👤 Stefan A. Siegel
- 👤 Michael L. Snodgrass
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 09:48
CPC Classifications
H; H04; H04B; H04B10/00; H04B10/60; H04B10/66; H04B10/69; H04B10/693; H04B10/6931
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
61 words
An optical receiver circuit for receiving optical signals comprising: a photodetector for converting an optical signal to an electrical signal; a transimpedance amplifier operatively connected to said photodetector; non-linear feedback means for increasing optical dynamic range of said converted electrical signal; and a compensation network connected in series with said non-linear feedback means for improving stability of said converted electrical signal.
Claim 2
Dependent Claim
61 words
An optical receiver circuit for receiving optical signals comprising: a photodetector for converting an optical signal to an electrical signal; a transimpedance amplifier operatively connected to said photodetector; non-linear feedback means for increasing optical dynamic range of said converted electrical signal; and a compensation network connected in series with said non-linear feedback means for improving stability of said converted electrical signal.
Claim 3
Dependent Claim
12 words
The receiver circuit of claim 1, wherein said photodetector is a photodiode.
Claim 4
Dependent Claim
17 words
The receiver circuit of claim 1, wherein said transimpedance amplifier causes a phase shift of 90 degrees.
Claim 5
Dependent Claim
15 words
The receiver circuit of claim 1, wherein said non-linear feedback means includes a Schottky diode.
Claim 6
Dependent Claim
21 words
The receiver circuit of claim 4 wherein said non-linear feedback means further includes a transimpedance receiver shunted by a parasitic capacitor.
Claim 7
Dependent Claim
19 words
The receiver circuit of claim 3, wherein said compensation network is a lead-type compensation network advancing said phase shift.
Claim 8
Dependent Claim
18 words
The receiver circuit of claim 6, wherein said lead-type compensation network advances said phase shift to 45 degrees.
Claim 9
Independent Claim
84 words
A method of receiving and converting an optical signal, comprising the steps of: detecting said optical signal via a photodetector; translating said optical signal to an electrical signal; amplifying said electrical signal through at least one amplification circuit creating an amplified electrical signal; feeding a portion of said amplified electrical signal back into said at least one amplification circuit; and compensating said portion of said amplified electrical signal in series with said at least one amplification circuit, improving stability of said amplified electrical signal.
Claim 10
Independent Claim
84 words
A method of receiving and converting an optical signal, comprising the steps of: detecting said optical signal via a photodetector; translating said optical signal to an electrical signal; amplifying said electrical signal through at least one amplification circuit creating an amplified electrical signal; feeding a portion of said amplified electrical signal back into said at least one amplification circuit; and compensating said portion of said amplified electrical signal in series with said at least one amplification circuit, improving stability of said amplified electrical signal.
Claim 11
Dependent Claim
15 words
The method of claim 8 wherein said amplifying said electrical signal causes a phase shift.
Claim 12
Dependent Claim
15 words
The method of claim 8, wherein said feeding step further includes biasing a Schottky diode.
Claim 13
Dependent Claim
19 words
The method of claim 10, wherein said feeding step further includes shunting a parasitic capacitor across a transimpedance resistor.
Claim 14
Dependent Claim
16 words
The method of claim 9, wherein said compensating step further advances said phase shift 45 degrees.
References Cited (Backward Citations)
US4620321A
Cited
US4759081A
Cited
US4623786A
Cited
US5202553A
Cited
US5286969A
Cited
US5329115A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-10-15 | 2000-04-15 | 2000-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-10-15 | 2004-04-15 | 2004-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-10-15 | 2008-04-15 | 2008-10-15 | $7700.00 | Window Closed / Lapsed |