US3775664A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control circuit for a high voltage power supply utilizing a rectifier cascade
Assignee: Siemens AG
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Filing: 1973-01-18
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Granted: 1973-11-27
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Expires: 1993-01-18
Abstract
Abstract A high voltage power supply unit employs a control circuit for controlling the output voltage provided by way of a rectifier cascade. A highly ohmic resistance and a potentiometer having a movable tap are serially connected between a tap of the rectifier cascade and ground. The movable tap is connected to a difference amplifier by way of an emitter follower circuit and the difference amplifier is connected to control a high voltage generator which feeds the rectifier cascade. A power stage, in the form of a Darlington circuit, is interposed between the difference amplifier and the high voltage generator to provide a sufficiently high load current supply for the high voltage generator.
Inventors
- 👤 U Forstmeyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:55
CPC Classifications
H; H02; H02M; H02M3/00; H04; H04N; H04N3/00; H04N3/10; H04N3/16; H04N3/18; H04N3/185
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
165 words
A circuit arrangement for the control of the output voltage of a high voltage power supply unit which has an output circuit including a rectifier cascade, comprising a voltage divider including a high ohmic resistor and a potentiometer connected in series with said resistor, said resistor connected to a point in said rectifier cascade and said potentiometer connected to a reference potential to provide a low voltage representation of the high output voltage of the rectifier cascade, said potentiometer including a movable tap, an amplifier having an input connected to said movable tap and an output, a difference amplifier having a first input connected to the reference potential, a second input connected to said output of said amplifier, and an output connected to the power supply unit for feeding a control signal thereto, and a Zener diode connected between the output of said difference amplifier and the reference potential to limit the control of the power supply unit by the output of said difference amplifier.
Claim 2
Dependent Claim
165 words
A circuit arrangement for the control of the output voltage of a high voltage power supply unit which has an output circuit including a rectifier cascade, comprising a voltage divider including a high ohmic resistor and a potentiometer connected in series with said resistor, said resistor connected to a point in said rectifier cascade and said potentiometer connected to a reference potential to provide a low voltage representation of the high output voltage of the rectifier cascade, said potentiometer including a movable tap, an amplifier having an input connected to said movable tap and an output, a difference amplifier having a first input connected to the reference potential, a second input connected to said output of said amplifier, and an output connected to the power supply unit for feeding a control signal thereto, and a Zener diode connected between the output of said difference amplifier and the reference potential to limit the control of the power supply unit by the output of said difference amplifier.
References Cited (Backward Citations)
US3477011A
Cited
US3533010A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-11-26 | 1977-05-28 | 1977-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-26 | 1981-05-28 | 1981-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-26 | 1985-05-28 | 1985-11-27 | $7700.00 | Window Closed / Lapsed |