Patent US3818318A successfully refreshed from Google Patents.
US3818318A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for regulating a d.c. voltage
Assignee: Individual
•
Filing: 1973-02-22
•
Granted: 1974-06-18
•
Expires: 1993-02-22
Abstract
Abstract Apparatus for regulating a d.c. voltage appearing across a load. The emitter-collector junction of a transistor is connected in series with a retardation coil and with the load impedance to a d.c. voltage source. The voltage applied to the load impedance is compared with a reference voltage in a regulating circuit. The latter circuit provides an output signal of a value which is a function of the d.c. voltage appearing across the load impedance. The conductivity of the emitter-collector path of the aforementioned transistor is controlled by the latter output signal. An adjustable impedance is connected in series with the primary winding of a transformer and to the voltage source. The secondary winding of the transformer is connected across the base-emitter junction of the aforementioned transistor, and the signal appearing across this winding controls the operation of the transistor. A frequency generator produces a timing signal, which through the regulating circuit, produces an edge of the output signal. The other edge of the output signal is a function of the d.c. voltage appearing across the load impedance.
Inventors
- 👤 H Schott
- 👤 M Huber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:40
CPC Classifications
H; H02; H02M; H02M3/00; H02M3/02; H02M3/04; H02M3/10; H02M3/145; H02M3/155; H02M3/156
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
265 words
Apparatus for regulating a direct current voltage appearing across a load impedance, comprising: a direct current voltage source, transistor switch means having a conducting path with a terminal on either end thereof and a control electrode which is responsive to predetermined voltages applied thereto for opening and closing said conducting path, one terminal of said conducting path being in series with said direct current source and the other terminal being in series with said load impedance, a series combination of a diode and resistor, said series combination being connected in series with said conducting path of said transistor switch and this combination being connected in series with said D.C. voltage source, first transformer means having primary and secondary windings, the voltage appearing across said secondary winding being coupled to said control electrode of said transistor switch, an operating voltage source, control circuit means including adjustable impedance means having a conducting path of adjustable impedance which connects said operating voltage source in series with said primary winding, a reference voltage source, means for comparing the output of said reference voltage source with the voltage appearing said load impedance, and in dependence on the compared result, for controlling the period of conduction of said adjustable impedance means, and timing generator means for producing an output signal for controlling the period of conduction of said adjustable impedance means in conjunction with said compared result, said timing generator means being coupled to said adjustable impedance means and means coupling the junction between said diode and resistor of said series combination to a control electrode of said adjustable impedance means.
Claim 2
Dependent Claim
265 words
Apparatus for regulating a direct current voltage appearing across a load impedance, comprising: a direct current voltage source, transistor switch means having a conducting path with a terminal on either end thereof and a control electrode which is responsive to predetermined voltages applied thereto for opening and closing said conducting path, one terminal of said conducting path being in series with said direct current source and the other terminal being in series with said load impedance, a series combination of a diode and resistor, said series combination being connected in series with said conducting path of said transistor switch and this combination being connected in series with said D.C. voltage source, first transformer means having primary and secondary windings, the voltage appearing across said secondary winding being coupled to said control electrode of said transistor switch, an operating voltage source, control circuit means including adjustable impedance means having a conducting path of adjustable impedance which connects said operating voltage source in series with said primary winding, a reference voltage source, means for comparing the output of said reference voltage source with the voltage appearing said load impedance, and in dependence on the compared result, for controlling the period of conduction of said adjustable impedance means, and timing generator means for producing an output signal for controlling the period of conduction of said adjustable impedance means in conjunction with said compared result, said timing generator means being coupled to said adjustable impedance means and means coupling the junction between said diode and resistor of said series combination to a control electrode of said adjustable impedance means.
Claim 3
Dependent Claim
57 words
The apparatus defined in claim 1 wherein said control circuit includes a differential amplifier for carrying out said comparison having an input connected to said reference voltage source and another input connected to receive the voltage appearing across said load impedance, said differential amplifier having an output coupled to the control electrode of said adjustable impedance means.
Claim 4
Dependent Claim
89 words
The apparatus defined in claim 1 further comprising: second transformer means having primary and secondary windings, said primary winding being in series with the conduction path of said transistor switch, said load impedance being connected in series with a tap on said primary winding, said secondary winding of said second transformer coupling the voltage appearing across the primary winding thereof to said control electrode of said adjustable impedance means as to render the latter non-conductive when the current flow through said second transformer primary winding exceeds a predetermined value.
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) | 1977-06-17 | 1977-12-17 | 1978-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-17 | 1981-12-17 | 1982-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-17 | 1985-12-17 | 1986-06-18 | $7700.00 | Window Closed / Lapsed |