Patent US5172018A successfully refreshed from Google Patents.
US5172018A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Current control device particularly for power circuits in mos technology
Assignee: STMicroelectronics SRL
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Filing: 1992-02-13
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Granted: 1992-12-15
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Expires: 2012-02-13
Abstract
Abstract Current control device particularly for power circuits in MOS technology, which comprises a MOSFET transistor which has its source terminal connected to one terminal of a dissipative load, its gate terminal connected to a pump circuit which receives in input a supply voltage and a square-waveform voltage, and its drain terminal connected to a power supply. The device furthermore comprises a control circuit which is coupled to the MOSFET transistor by means of an electrical connection and generates signals for adjusting the supply voltage and the square-waveform voltage of the pump circuit.
Inventors
- 👤 Francesco Colandrea
- 👤 Vanni Poletto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:42
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/08; H03K17/082; H03K17/0822; G; G05; G05F; G05F1/00; G05F1/10; G05F1/46; G05F1/56; G05F1/575; H03K17/16; H03K17/161; H03K17/165
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
131 words
Current control device particularly for power circuits in MOS technology, comprising an N-channel MOSFET transistor which has its source terminal connected to one terminal of a dissipative load whose other terminal is connected to the ground, its gate terminal connected to a pump circuit and its drain terminal connected to a power supply, said pump circuit receiving in input a supply voltage and a square-waveform voltage, and a control circuit which has at least one input coupled by means of an electrical connection to said N-channel MOSFET transistor and is suitable for adjusting the voltage between said gate terminal and said source terminal of said MOSFET transistor, said control circuit being suitable for generating signals for adjusting said supply voltage and said square-waveform voltage applied to inputs of said pump circuit.
Claim 2
Dependent Claim
131 words
Current control device particularly for power circuits in MOS technology, comprising an N-channel MOSFET transistor which has its source terminal connected to one terminal of a dissipative load whose other terminal is connected to the ground, its gate terminal connected to a pump circuit and its drain terminal connected to a power supply, said pump circuit receiving in input a supply voltage and a square-waveform voltage, and a control circuit which has at least one input coupled by means of an electrical connection to said N-channel MOSFET transistor and is suitable for adjusting the voltage between said gate terminal and said source terminal of said MOSFET transistor, said control circuit being suitable for generating signals for adjusting said supply voltage and said square-waveform voltage applied to inputs of said pump circuit.
Claim 3
Dependent Claim
43 words
Control device according to claim 1, wherein said adjustment signals are constituted by a current which is suitable for controlling the supply voltage of said pump circuit and by a signal which is suitable for continuously varying the amplitude of said square-waveform voltage.
Claim 4
Dependent Claim
133 words
Current control device particularly for power circuits in MOS technology, comprising a P-channel MOSFET transistor which has its source terminal connected to one terminal of a dissipative load whose other terminal is connected to a supply voltage, its gate terminal connected to a pump circuit and its drain terminal connected to a negative power supply, said pump circuit receiving in input a supply voltage and a square-waveform voltage, and a control circuit which has at least one input coupled by means of an electrical connection to said P-channel MOSFET transistor and is suitable for adjusting the voltage between said gate terminal and said source terminal of said MOSFET transistor, said control circuit being suitable for generating signals for adjusting said supply voltage and said square-waveform voltage applied to inputs of said pump circuit.
Claim 5
Dependent Claim
133 words
Current control device particularly for power circuits in MOS technology, comprising a P-channel MOSFET transistor which has its source terminal connected to one terminal of a dissipative load whose other terminal is connected to a supply voltage, its gate terminal connected to a pump circuit and its drain terminal connected to a negative power supply, said pump circuit receiving in input a supply voltage and a square-waveform voltage, and a control circuit which has at least one input coupled by means of an electrical connection to said P-channel MOSFET transistor and is suitable for adjusting the voltage between said gate terminal and said source terminal of said MOSFET transistor, said control circuit being suitable for generating signals for adjusting said supply voltage and said square-waveform voltage applied to inputs of said pump circuit.
Claim 6
Dependent Claim
43 words
Control device according to claim 3, wherein said adjustment signals are constituted by a current which is suitable for controlling the supply voltage of said pump circuit and by a signal which is suitable for continuously varying the amplitude of said square-waveform voltage.
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) | 1995-12-15 | 1996-06-15 | 1996-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-12-15 | 2000-06-15 | 2000-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-12-15 | 2004-06-15 | 2004-12-15 | $7700.00 | Window Closed / Lapsed |