US3916294A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cable television substation regulated power supply with ripple suppression
Assignee: Magnavox Electronic Systems Co
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Filing: 1974-03-21
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Granted: 1975-10-28
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Expires: 1994-03-21
Abstract
Abstract A voltage regulating circuit in which the suppression of the ripple component of the output voltage is maintained at input voltage levels insufficient to support the regulation of the steady output voltage component. The ripple suppression is achieved at low input voltage levels without additional active devices. Through incorporation of a resistor in a circuit location not normally including a resistor, and by appropriate selection of component values, the ripple suppression at low input voltage levels is achieved without appreciable deterioration of the output voltage regulation under normal operating conditions.
Inventors
- 👤 Kenneth E Kennedy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:12
CPC Classifications
G; G05; G05F; G05F1/00; G05F1/10; G05F1/46; G05F1/56; G05F1/565
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
130 words
A circuit for providing a regulated output voltage from an unregulated input voltage comprising: controllable resistance means coupled between an input voltage terminal and an output voltage terminal; means for supplying a stable voltage level; amplifier means for controlling said resistance means, said amplifier means coupled to means for supplying the stable voltage level, a value of resistance of said resistance means between said input terminal and said output terminal determined by said means for supplying a stable voltage and said output voltage; means for suppressing transients coupled to said amplifier means, said transient suppression means suppressing voltage transients upon failure of a voltage means to provide a stable voltage level, and wherein said transient suppression means includes a resistor and a capacitor coupled in parallel to said Zener diode.
Claim 2
Dependent Claim
130 words
A circuit for providing a regulated output voltage from an unregulated input voltage comprising: controllable resistance means coupled between an input voltage terminal and an output voltage terminal; means for supplying a stable voltage level; amplifier means for controlling said resistance means, said amplifier means coupled to means for supplying the stable voltage level, a value of resistance of said resistance means between said input terminal and said output terminal determined by said means for supplying a stable voltage and said output voltage; means for suppressing transients coupled to said amplifier means, said transient suppression means suppressing voltage transients upon failure of a voltage means to provide a stable voltage level, and wherein said transient suppression means includes a resistor and a capacitor coupled in parallel to said Zener diode.
Claim 3
Dependent Claim
19 words
The circuit of claim 1 wherein said controllable resistance means includes a transistor pair coupled in a Darlington arrangment.
Claim 4
Dependent Claim
113 words
A circuit for providing a regulated output voltage from an unregulated d.c. input voltage comprising: voltage means for providing a stable reference voltage; network means for providing a signal voltage related to said output voltage; means for comparison of said reference voltage and said signal voltage, said comparison means providing a difference signal; feedback means coupled to saId comparison means, said feedback means varying said output voltage as a function of said difference signal; circuit means for providing a reference voltage which is related to the output voltage and coupled to said comparison means to provide a reference voltage when said voltage means is inoperative; and said circuit means includes only passive elements.
Claim 5
Dependent Claim
113 words
A circuit for providing a regulated output voltage from an unregulated d.c. input voltage comprising: voltage means for providing a stable reference voltage; network means for providing a signal voltage related to said output voltage; means for comparison of said reference voltage and said signal voltage, said comparison means providing a difference signal; feedback means coupled to saId comparison means, said feedback means varying said output voltage as a function of said difference signal; circuit means for providing a reference voltage which is related to the output voltage and coupled to said comparison means to provide a reference voltage when said voltage means is inoperative; and said circuit means includes only passive elements.
Claim 6
Dependent Claim
18 words
The circuit of claim 3 wherein said circuit means includes a resistor and a capacitor coupled in parallel.
Claim 7
Dependent Claim
42 words
The circuit of claim 4 wherein said means for comparison includes a npn transistor, wherein said voltage means includes a Zener diode coupled to an emitter of said transistor, and wherein said circuit means is coupled in parallel with said Zener diode.
Claim 8
Dependent Claim
155 words
A circuit for providing a regulated output voltage from an unregulated d.c. input voltage comprising: controllable resistance means, said resistance means coupled between an input voltage terminal and an output voltage terminal; means for controlling said resistance means; means for providing a voltage level related to said output voltage, said voltage level means coupled to said control means; and means for providing a reference voltage signal, said reference means coupled to said control means, output wherein said control means output is dependent on a difference between said voltage level and said voltage signal, reference wherein said reference voltage is provided for d.c. ripple output voltage components above a predetermined input voltage level, wherein a second voltage level, coupled to said control means, is provided for controlling said ripple frequency output voltage components below said predetermined input voltage level, and said reference means includes a Zener diode, a resistor and a capacitor, all coupled in parallel.
Claim 9
Dependent Claim
155 words
A circuit for providing a regulated output voltage from an unregulated d.c. input voltage comprising: controllable resistance means, said resistance means coupled between an input voltage terminal and an output voltage terminal; means for controlling said resistance means; means for providing a voltage level related to said output voltage, said voltage level means coupled to said control means; and means for providing a reference voltage signal, said reference means coupled to said control means, output wherein said control means output is dependent on a difference between said voltage level and said voltage signal, reference wherein said reference voltage is provided for d.c. ripple output voltage components above a predetermined input voltage level, wherein a second voltage level, coupled to said control means, is provided for controlling said ripple frequency output voltage components below said predetermined input voltage level, and said reference means includes a Zener diode, a resistor and a capacitor, all coupled in parallel.
Claim 10
Dependent Claim
44 words
The circuit of claim 6 wherein said control means includes a transistor, an emitter of said transistor being coupled to said reference voltage means, and wherein a collector of said transistor is coupled through at least two resistive elements to said input voltage terminal.
Claim 11
Dependent Claim
105 words
A circuit for providing a regulated output voltage from an unregulated d.c. input voltage comprising: at least one transistor coupled between an input voltage terminal and an output voltage terminal; a control transistor for controlling a voltage across said at least one transistor; a first network coupled to an emitter of said control transistor, said network including a Zener diode, a resistor and a capacitor all connected in parallel; a second network coupled between a base of said transistor and said output voltage terminal, wherein said voltage across said one transistor is dependent on the control transistor base voltage and the control transistor emitter voltage.
Claim 12
Dependent Claim
105 words
A circuit for providing a regulated output voltage from an unregulated d.c. input voltage comprising: at least one transistor coupled between an input voltage terminal and an output voltage terminal; a control transistor for controlling a voltage across said at least one transistor; a first network coupled to an emitter of said control transistor, said network including a Zener diode, a resistor and a capacitor all connected in parallel; a second network coupled between a base of said transistor and said output voltage terminal, wherein said voltage across said one transistor is dependent on the control transistor base voltage and the control transistor emitter voltage.
Claim 13
Dependent Claim
21 words
The circuit of claim 8 wherein a third network couples a collector of said control transistor to said input voltage terminal.
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) | 1978-10-27 | 1979-04-28 | 1979-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-27 | 1983-04-28 | 1983-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-27 | 1987-04-28 | 1987-10-28 | $7700.00 | Window Closed / Lapsed |