Patent US3667028A successfully refreshed from Google Patents.
US3667028A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rectifier circuit including transistors
Assignee: Dienes Honeywell Holding GmbH
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Filing: 1970-10-26
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Granted: 1972-05-30
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Expires: 1990-10-26
Abstract
Abstract A rectifier circuit which uses transistors, is unaffected by changes in ambient temperature and frequency, and shows a linear relation between input AC and output DC. In the invention, the diode or diodes of a rectifier circuit are replaced by the emitter-collector path of a transistor (Q) and the base electrode of the transistor is connected to one of the output terminals 3 by means of a resistor R1 having a high resistance compared to the base input resistance of the transistor.
Inventors
- 👤 Axel Leufgen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:11
CPC Classifications
G; G01; G01R; G01R19/00; G01R19/22; H; H02; H02M; H02M7/00; H02M7/02; H02M7/04; H02M7/12; H02M7/21; H02M7/217; H02M7/2173
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
112 words
A transistorized rectifier circuit having a linear input/output characteristic for obtaining an output DC-voltage which is independent of changes in ambient temperature and frequency, comprising input terminals, output terminals, a transistor having its emitter-collector-path between one input terminal and one output terminal, the base electrode of said transistor being connected by means of a resistor to the other one of the output terminals, said resistor having a high resistance compared with the base-input resistance of the transistor and a voltage source electricslly connected between said other output terminal and the resistor, said voltage source having the same polarity as a current flow from the emitter to the base electrode of the transistor.
Claim 2
Dependent Claim
112 words
A transistorized rectifier circuit having a linear input/output characteristic for obtaining an output DC-voltage which is independent of changes in ambient temperature and frequency, comprising input terminals, output terminals, a transistor having its emitter-collector-path between one input terminal and one output terminal, the base electrode of said transistor being connected by means of a resistor to the other one of the output terminals, said resistor having a high resistance compared with the base-input resistance of the transistor and a voltage source electricslly connected between said other output terminal and the resistor, said voltage source having the same polarity as a current flow from the emitter to the base electrode of the transistor.
Claim 3
Dependent Claim
17 words
A rectifier circuit according to claim 1 with a capacitor connected across the resistor and voltage source.
Claim 4
Dependent Claim
29 words
A rectifier circuit according to claim 1 connected to the output of an amplifier, the feedback circuit of which includes a similar rectifier circuit which is conducting for AC.
Claim 5
Dependent Claim
13 words
A rectifier circuit according to claim 3 wherein the amplifier is a DC-amplifier.
Claim 6
Dependent Claim
38 words
A rectifier circuit according to claim 4 for measuring direct current or DC-voltages in combination with switch means for switching off one portion of the rectifier circuit so that the polarity of the input signal can be determined.
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) | 1975-05-30 | 1975-11-29 | 1976-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-30 | 1979-11-29 | 1980-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-30 | 1983-11-29 | 1984-05-30 | $7700.00 | Window Closed / Lapsed |