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US3678280A
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US
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Electro-optical converter using a pulse generating diode to generate signal having pulse repetition frequency according to light signal
Assignee: Panasonic Holdings Corp
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Filing: 1970-09-17
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Granted: 1972-07-18
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Expires: 1990-09-17
Abstract
Abstract An electro-optical converter comprising a first loop including in series a photoconductive element having a photoconductive body and a light permeable electrode mounted at one end of the body, a DC power source and a pulse generating diode, and a second loop including in series the pulse generating diode as a common element and an electroluminescent material having a light permeable electrode at one end thereof. The other ends of the photoconductive body and the electroluminescent material are made in electrical contact with each other. When the first loop oscillates with an input light signal being incident on the photoconductive body, the second loop is energized to emit an output light signal. The intensity of this light signal depends upon that of the incident light and upon the bias voltage applied to the pulse generating diode by the DC power source. The pulse generating diode employed in this converter is a novel one having a Nu -N structure.
Inventors
- 👤 Sadahiko Yamashita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:16
CPC Classifications
H; H03; H03K; H03K7/00; H03K7/06; H03K3/00; H03K3/02; H03K3/42; H03K3/64
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
140 words
An oscillatory circuit for producing a pulse signal having a frequency according to a light signal thereto, comprising a pulse generating diode having an N-type semi-conductive wafer sandwitched between two electrodes and including a high resistive layer which is doped with iron, said pulse generating diode commencing to oscillate by itself when a voltage applied thereto exceeds the threshold voltage thereof, a photoconductive element having a photoconductive substrate sandwitched between two light permeable electrodes one of which is connected to one electrode of said diode, a DC power source for producing a DC power having a voltage higher than the threshold voltage of said diode and having one terminal connected to the other electrode of said photoconductive element, and a load impedance having one termInal of said power source and another terminal connected to the other electrode of said diode.
Claim 2
Dependent Claim
140 words
An oscillatory circuit for producing a pulse signal having a frequency according to a light signal thereto, comprising a pulse generating diode having an N-type semi-conductive wafer sandwitched between two electrodes and including a high resistive layer which is doped with iron, said pulse generating diode commencing to oscillate by itself when a voltage applied thereto exceeds the threshold voltage thereof, a photoconductive element having a photoconductive substrate sandwitched between two light permeable electrodes one of which is connected to one electrode of said diode, a DC power source for producing a DC power having a voltage higher than the threshold voltage of said diode and having one terminal connected to the other electrode of said photoconductive element, and a load impedance having one termInal of said power source and another terminal connected to the other electrode of said diode.
Claim 3
Dependent Claim
27 words
An oscillatory circuit according to claim 6, wherein said pulse generating diode and said photoconductive element are made integral with each other to form a compound element.
Claim 4
Dependent Claim
67 words
An oscillatory circuit according to claim 2, wherein said compound element is composed of a semiconductive material of N-type, a highly resistive layer of Nu -type formed adjacent to one of the two major surfaces thereof, a photoconductive material disposed adjacent to the other of said major surfaces, and a pair of light permeable electrodes mounted respectively in contact with said resistive layer and said photoconductive material.
Claim 5
Dependent Claim
143 words
An electro-optical converter comprising a first loop including in series a photoconductive element having a photoconductive body and a light permeable electrode mounted at one end of said body, a DC power source and a pulse generating diode, and a second loop including in series said pulse generating diode as a common element and an electroluminescent material having a light permeable electrode at one end thereof, the other ends of said photoconductive body and said electroluminescent material being in electrical contact with each other, through a light permeable electrode whereby, when the first loop oscillates with an input light signal being incident on said photoconductive body, the second loop is energized to emit an output light signal having an intensity depending upon that of the incident light and upon the bias voltage applied to said pulse generating diode by said DC power source.
Claim 6
Dependent Claim
143 words
An electro-optical converter comprising a first loop including in series a photoconductive element having a photoconductive body and a light permeable electrode mounted at one end of said body, a DC power source and a pulse generating diode, and a second loop including in series said pulse generating diode as a common element and an electroluminescent material having a light permeable electrode at one end thereof, the other ends of said photoconductive body and said electroluminescent material being in electrical contact with each other, through a light permeable electrode whereby, when the first loop oscillates with an input light signal being incident on said photoconductive body, the second loop is energized to emit an output light signal having an intensity depending upon that of the incident light and upon the bias voltage applied to said pulse generating diode by said DC power source.
Claim 7
Dependent Claim
24 words
An electro-optical device comprising a plurality of the electro-optical converters of claim 4 arranged in cascade and in optically coupling relationship with each other.
References Cited (Backward Citations)
US1934726A
Cited
US3033989A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-18 | 1976-01-17 | 1976-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-18 | 1980-01-17 | 1980-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-18 | 1984-01-17 | 1984-07-18 | $7700.00 | Window Closed / Lapsed |