US3590251A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Operational amplifier having light sources and optically coupled photoconductor elements in output circuit thereof
Assignee: Individual
•
Filing: 1969-02-28
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Granted: 1971-06-29
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Expires: 1989-02-28
Abstract
Abstract A high output voltage operational amplifier having light sources connected to the output of the associated preamplifier stage. A plurality of the light sources are connected to be selectively responsive to the polarity of the operational preamplifier output. Individual photoconductor elements are optically coupled with each of the light sources and their respective values of resistance are dependent upon the amount of illumination thereof by the associated light sources. The photoconductor elements are electrically isolated from their respective light sources but are optically responsive thereto to provide an output signal that is dependent upon the amplitude and polarity of the output of the operational preamplifier.
Inventors
- 👤 Robert E Vosteen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:14
CPC Classifications
H; H03; H03F; H03F3/00; H03F3/04; H03F3/08; H03F3/087
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
188 words
An operational amplifier circuit arrangement comprising: an operational preamplifier, first and second light source means connected to the output circuit of the operational preamplifier, the first light source means being selectively energizable in response to an operational preamplifier output of one polarity, the second light source means being selectively energizable in response to an operational preamplifier output of the opposite polarity, first, second, third and fourth photoconductor means connected to comprise the four arms of a bridge having values of resistance that vary with the amount of incident light applied thereto, the first light source means being optically coupled to the first and third photoconductor elements, the second light source means being optically coupled to the second and fourth photoconductor means, comprising opposite arms of the bridge, load means connected between a first set of diagonals of the bridge, power supply means connected between the second set of diagonals of the bridge, the load means providing an operational amplifier output of one polarity in response to energization of the first light source means and of the opposite polarity in response to energization of the second light source means.
Claim 2
Dependent Claim
188 words
An operational amplifier circuit arrangement comprising: an operational preamplifier, first and second light source means connected to the output circuit of the operational preamplifier, the first light source means being selectively energizable in response to an operational preamplifier output of one polarity, the second light source means being selectively energizable in response to an operational preamplifier output of the opposite polarity, first, second, third and fourth photoconductor means connected to comprise the four arms of a bridge having values of resistance that vary with the amount of incident light applied thereto, the first light source means being optically coupled to the first and third photoconductor elements, the second light source means being optically coupled to the second and fourth photoconductor means, comprising opposite arms of the bridge, load means connected between a first set of diagonals of the bridge, power supply means connected between the second set of diagonals of the bridge, the load means providing an operational amplifier output of one polarity in response to energization of the first light source means and of the opposite polarity in response to energization of the second light source means.
Claim 3
Dependent Claim
43 words
An operational amplifier circuit as recited in claim 1 further comprising: first and second rectifier means respectively connected in series with the first and second light source means to polarize the latter to be responsive to the selected polarity of operational preamplifier output.
Claim 4
Dependent Claim
34 words
An operational amplifier as recited in claim 2 wherein each of the photoconductor means have values of resistance that vary inversely with the amount of incident light applied thereto by the associated photoconductor means.
Claim 5
Dependent Claim
19 words
An operational amplifier as recited in claim 3 further comprising; limiting means connected to limit the operational amplifier output.
Claim 6
Dependent Claim
66 words
An operational amplifier circuit arrangement as recited in claim 1 wherein the first light source means comprises the parallel connection of individual first and second light sources jointly optically coupled to both the first and third photoconductor means and the second light source means comprises the parallel connection of individual third and fourth light sources jointly optically coupled to both the second and fourth photoconductor means.
Claim 7
Dependent Claim
45 words
An operational amplifier as recited in claim 5 further comprising: first, second, third and fourth rectifier means respectively connected in series with the first, second, third and fourth light sources to polarize the latter to be responsive to the selected polarity of operational preamplifier output.
Claim 8
Dependent Claim
34 words
An operational amplifier as recited in claim 6 wherein each of the photoconductor means have values of resistance that vary inversely with the amount of incident light applied thereto by the associated light source.
Claim 9
Dependent Claim
19 words
An operational amplifier as recited in claim 7 further comprising: limiting means connected to limit the operational amplifier output.
Claim 10
Dependent Claim
63 words
An operational amplifier circuit as recited in claim 1 wherein the first light source means comprises the parallel connection of first and second individual light sources respectively optically coupled to the first and third photoconductor means, and the second light source means compriseS the parallel connection of third and fourth individual light sources respectively optically coupled to the second and fourth photoconductor means.
Claim 11
Dependent Claim
45 words
An operational amplifier as recited in claim 9 further comprising: first, second, third and fourth rectifier means respectively connected in series with the first, second, third and fourth light sources to polarize the latter to be responsive to the selected polarity of operational preamplifier output.
Claim 12
Dependent Claim
34 words
An operational amplifier as recited in claim 10 wherein each of the photoconductor means have values of resistance that vary inversely with the amount of incident light applied thereto by the associated photoconductor means.
Claim 13
Dependent Claim
19 words
An operational amplifier as recited in claim 11 further comprising: limiting means connected to limit the operational amplifier output.
Claim 14
Dependent Claim
161 words
An operational amplifier circuit arrangement comprising: an operational preamplifier, first and second light sources connected to the output of the operational preamplifier, the first light source being selectively energizable in response to an operational preamplifier output of one polarity, the second light source being selectively energizable in response to an operational preamplifier of the opposite polarity, series connected first and second photoconductor means optically coupled to the first and second light sources respectively, and having values of resistance that vary with the amount of incident light applied thereto by the latter, a load circuit including a common load resistance connected to the common connection of the series-connected first and second photoconductor means, a power supply means connected to the first and second photoconductor means and the load circuit to provide an operational amplifier output of one polarity in response to energization of the first light source and of the opposite polarity in response to energization of the second light source means,
Claim 15
Dependent Claim
161 words
An operational amplifier circuit arrangement comprising: an operational preamplifier, first and second light sources connected to the output of the operational preamplifier, the first light source being selectively energizable in response to an operational preamplifier output of one polarity, the second light source being selectively energizable in response to an operational preamplifier of the opposite polarity, series connected first and second photoconductor means optically coupled to the first and second light sources respectively, and having values of resistance that vary with the amount of incident light applied thereto by the latter, a load circuit including a common load resistance connected to the common connection of the series-connected first and second photoconductor means, a power supply means connected to the first and second photoconductor means and the load circuit to provide an operational amplifier output of one polarity in response to energization of the first light source and of the opposite polarity in response to energization of the second light source means,
Claim 16
Dependent Claim
41 words
An operational amplifier as recited in claim 13 further comprising: first and second rectifier means respectively connected in series with the first and second light sources to polarize the latter to be responsive to the selected polarity of operational preamplifier output.
Claim 17
Dependent Claim
32 words
An operational amplifier circuit arrangement as recited in claim 14 wherein the first and second photoconductor means have values of resistance that vary inversely with the amount of incident light applied thereto.
Claim 18
Dependent Claim
19 words
An operational amplifier as recited in claim 15 further comprising: limiting means connected to limit the operational amplifier output.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-28 | 1974-12-28 | 1975-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-28 | 1978-12-28 | 1979-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-28 | 1982-12-28 | 1983-06-29 | $7700.00 | Window Closed / Lapsed |