US4796174A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Direct voltage multiplier capable of being integrated into a semiconducting structure
Assignee: STMicroelectronics SA
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Filing: 1987-04-01
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Granted: 1989-01-03
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Expires: 2007-04-01
Abstract
Abstract A direct voltage multiplier which can be integrated into a semiconducting structure. The multiplier comprises a capacitor which is charged and discharged at the pace of a clock signal, with a depletion-mode MOS transistor mounted as a resistor and enabling the capacitor to be discharged. The invention makes it possible to integrate the multiplier into a semiconducting substrate and can be used, in particular, to control a VD MOS.
Inventors
- 👤 Bruno Nadd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:18
CPC Classifications
H; H10; H10D; H10D84/00; H10D84/80; H10D84/811; H02; H02M; H02M3/00; H02M3/02; H02M3/04; H02M3/06; H02M3/07; H03; H03K; H03K17/00; H03K17/06; H03K17/063; H03K17/51; H03K17/56; H03K17/687; H03K17/30; H03K2017/307; H03K2217/00; H03K2217/0081
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
204 words
Multiplier of a direct voltage with a predetermined value in relation to a reference point, comprising at least one cell of the voltage doubler type, operating by the charging and discharging of a capacitor and controlled by a clock signal, the multiplier being designed to give a control signal to a device that has an input capacity of a predetermined value, multiplier comprising: electronic means by which a first electrode of the capacitor can be set at the potential of the reference point according to the clock signal, a diode linked to a second electrode of the capacitor, the diode providing for the passage of charging current under the effect of the direct voltage of predetermined value, this charge taking place when the first electrode of the capacitor is set at the potential of the reference point, a resistor linking the common point between the diode and the capacitor to the device to be controlled, the resistor having a resistance and the clock signal having a pulse ratio such that the charging time of the capacitor is smaller than its discharging time, said capacitor charging to said predetermined value of said direct voltage only after application of plural clock pulses of said clock signal.
Claim 2
Dependent Claim
204 words
Multiplier of a direct voltage with a predetermined value in relation to a reference point, comprising at least one cell of the voltage doubler type, operating by the charging and discharging of a capacitor and controlled by a clock signal, the multiplier being designed to give a control signal to a device that has an input capacity of a predetermined value, multiplier comprising: electronic means by which a first electrode of the capacitor can be set at the potential of the reference point according to the clock signal, a diode linked to a second electrode of the capacitor, the diode providing for the passage of charging current under the effect of the direct voltage of predetermined value, this charge taking place when the first electrode of the capacitor is set at the potential of the reference point, a resistor linking the common point between the diode and the capacitor to the device to be controlled, the resistor having a resistance and the clock signal having a pulse ratio such that the charging time of the capacitor is smaller than its discharging time, said capacitor charging to said predetermined value of said direct voltage only after application of plural clock pulses of said clock signal.
Claim 3
Dependent Claim
53 words
Multiplier according to the claim 1, wherein the resistance of the said resistor is about 10 times greater than the output resistance of the said electronic means, the pulse ratio of the clock signal being such that the charging time of the capacitor is 4 to 9 times smaller than its discharging time.
Claim 4
Dependent Claim
36 words
Multiplier according to the claim 1, wherein the resistor linked to the device to be controlled is made by means of a depletion-mode MOS transistor having its gate linked to one of its two other electrodes.
Claim 5
Dependent Claim
54 words
Multiplier according to the claim 3, wherein the device to be controlled is a VD MOS made from an N type substrate, the substrate also comprising a first P type well by which the said depletion-mode transistor can be made and a second P type well by which the said capacitor can be made.
Claim 6
Dependent Claim
60 words
Multiplier according to the claim 4, wherein the first well is taken to the potential of the said direct voltage with a determined value, the said diode being then formed by the junction that exists between the P type region of the first well and the N type region of the depletion-mode MOS transistor which is linked to the capacitor.
Claim 7
Dependent Claim
14 words
Multiplier according to the claim 1, wherein the said electronic means comprise an inverter.
References Cited (Backward Citations)
US4016476A
Cited
FR2458936A1
Cited
US4559548A
Cited
EP0134731A1
Cited
JPS6074665A
Cited
US4641081A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-01-03 | 1992-07-04 | 1993-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-01-03 | 1996-07-04 | 1997-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-01-03 | 2000-07-04 | 2001-01-03 | $7700.00 | Window Closed / Lapsed |