US3820007A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Monolithic integrated voltage stabilizer circuit with tapped diode string
Assignee: TDK Micronas GmbH
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Filing: 1973-07-09
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Granted: 1974-06-25
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Expires: 1993-07-09
Abstract
Abstract This relates to a monolithic integrated voltage stabilizing circuit containing a stabilizing chain of series connected diodes at the connection points of which several stabilized voltages are tapped. All stabilized voltages below the momentary value of the supply voltage are always present. Additional constant current source transistors form a multi-collector lateral pnp transistor.
Inventors
- 👤 H Schilling
- 👤 W Hoehn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:42
CPC Classifications
G; G05; G05F; G05F3/00; G05F3/02; G05F3/08; G05F3/10; G05F3/16; G05F3/18
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
216 words
A monolithic integrated voltage stabilizing circuit comprising: a source of supply voltage; a plurality of series connected reference elements having tapping points from which stabilized voltages can be tapped; a first resistor; a first npn transistor having a base connected to the tapping point of the lowest voltage to be stabilized and having an emitter coupled via said first resistor to ground; a first pnp diode connected transistor having an emitter coupled to said source of supply voltage and having a base and collector coupled together and to the collector of said first npn transistor; a starting resistor coupled between the tapping of the lowest voltage to be stabilized and said source of supply voltage; a second pnp transistor having an emitter coupled to said source of supply voltage, a base coupled to the base of said first pnp transistor and a collector coupled to the base of said npn transistor via said plurality of series connected reference elements; and a plurality of additional pnp transistors (T2 . . . Tn) each having emitters coupled to said source of supply voltage, each having bases coupled together and to the base of said second pnp transistor and each of said plurality having a collector coupled to one of said tapping points of said series connected reference elements.
Claim 2
Dependent Claim
216 words
A monolithic integrated voltage stabilizing circuit comprising: a source of supply voltage; a plurality of series connected reference elements having tapping points from which stabilized voltages can be tapped; a first resistor; a first npn transistor having a base connected to the tapping point of the lowest voltage to be stabilized and having an emitter coupled via said first resistor to ground; a first pnp diode connected transistor having an emitter coupled to said source of supply voltage and having a base and collector coupled together and to the collector of said first npn transistor; a starting resistor coupled between the tapping of the lowest voltage to be stabilized and said source of supply voltage; a second pnp transistor having an emitter coupled to said source of supply voltage, a base coupled to the base of said first pnp transistor and a collector coupled to the base of said npn transistor via said plurality of series connected reference elements; and a plurality of additional pnp transistors (T2 . . . Tn) each having emitters coupled to said source of supply voltage, each having bases coupled together and to the base of said second pnp transistor and each of said plurality having a collector coupled to one of said tapping points of said series connected reference elements.
Claim 3
Dependent Claim
29 words
A stabilizing circuit according to claim 1 wherein all pnp transistors (To . . . Tn) are one single lateral transistor having several collectors (Co . . . Cn).
Claim 4
Dependent Claim
82 words
A stabilizing circuit according to claim 2 wherein said lateral transistor is designed so that the emitter region (E) is strip-shaped and located in the center of the base region (B), and wherein the individual collector regions (Co . . . Cn) are arranged along the circumference, over and opposite to, the emitter region, and wherein the collector region (Cn) connected to the tap of the lowest voltage to be stabilized encloses the other collector regions (Co . . . Cn 1).
Claim 5
Dependent Claim
194 words
A stabilizing circuit according to claim 2 wherein said lateral transistor has an emitter region (E) which is strip-shaped and located in the center of the base region (B), and wherein the collector regions (Co, C1, Cn) of said first pnp transistor (To), of said second pnp transistor (T1), and of the last of said plurality of additional pnp transistors (Tn) associated with the tap of the lowest voltage to be stabilized are arranged along the circumference, and opposite to, the emitter region, and wherein the collector region connected to the second highest voltage to be stabilized lies opposite to the collector region of said second pnp transistor (T1) without lying opposite to the emitter region, and wherein the collector region of the third from last of said plurality of additional pnp transistors (Cn 2) is connected to the third highest voltage to be stabilized and lies opposite the collector region (C2) connected to the second highest voltage to be stabilized without lYing opposite the emitter region, and wherein the collector region (Cn) connected to the lowest voltage to be stabilized additionally encloses the other collector regions in the form of a closed frame.
Claim 6
Dependent Claim
32 words
A stabilizing circuit according to claim 3 wherein the edge portions of all collector regions (Co . . . Cn) which lie opposite the emitter region (E) are of the same length.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-24 | 1977-12-24 | 1978-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-24 | 1981-12-24 | 1982-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-24 | 1985-12-24 | 1986-06-25 | $7700.00 | Window Closed / Lapsed |