Patent US3746892A successfully refreshed from Google Patents.
US3746892A
Expired / Lapsed
US
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Output voltage regulation system
Assignee: Individual
•
Filing: 1971-04-19
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Granted: 1973-07-17
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Expires: 1991-04-19
Abstract
Abstract A time constant circuit comprising a variable resistor and a capacitor has a differencial amplifier connected thereto. Between the time constant circuit and the differential amplifier, an unidirectional feedback path is connected to provide the regulated output voltage.
Inventors
- 👤 M Ogiso
- 👤 T Taguchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:45
CPC Classifications
G; G03; G03B; G03B7/00; G03B7/08; G03B7/081; G03B7/083; H; H03; H03K; H03K17/00; H03K17/28; H03K17/51; H03K17/78; H03K17/795
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
138 words
An output voltage regulation system adapted to apply a voltage divided by a bleeder resistor to one input terminal of a difference amplifier as one input voltage, a unidirectional feedback path being provided between a first point at which the other input voltage of said difference amplifier is derived and a second point at which the output voltage of said difference amplifier is derived, said feedback path being adapted to cause a flow of current from said first point to said second point only when the voltage across said other input is higher than the output voltage of said difference amplifier so that said other input voltage may derive the stabilized output voltage, and the said other input voltage being derived through the charging or discharging of a time constant circuit comprising a variable resistor and a capacitor.
Claim 2
Dependent Claim
138 words
An output voltage regulation system adapted to apply a voltage divided by a bleeder resistor to one input terminal of a difference amplifier as one input voltage, a unidirectional feedback path being provided between a first point at which the other input voltage of said difference amplifier is derived and a second point at which the output voltage of said difference amplifier is derived, said feedback path being adapted to cause a flow of current from said first point to said second point only when the voltage across said other input is higher than the output voltage of said difference amplifier so that said other input voltage may derive the stabilized output voltage, and the said other input voltage being derived through the charging or discharging of a time constant circuit comprising a variable resistor and a capacitor.
Claim 3
Dependent Claim
31 words
An output voltage regulation system as specified in claim 1 in which the variable resistance means comprises a combination of a photodiode (FIG. 7 PD) and a transistor (FIG. 7 T).
Claim 4
Dependent Claim
23 words
An output voltage regulation system as specified in claim 1 wherein said variable resistor in said time constant circuit is a photoconductive element.
Claim 5
Dependent Claim
24 words
An output voltage regulation system as specified in claim 1 wherein said one input voltage is controllable whereby the output voltage may become controllable.
Claim 6
Dependent Claim
23 words
An output voltage regulation system as specified in claim 1 wherein said one input voltage is stabilized by means of a constant-voltage element.
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) | 1976-07-16 | 1977-01-15 | 1977-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-16 | 1981-01-15 | 1981-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-16 | 1985-01-15 | 1985-07-17 | $7700.00 | Window Closed / Lapsed |