US4260908A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microelectronic remote switching circuit
Assignee: Texas Instruments Inc
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Filing: 1978-08-30
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Granted: 1981-04-07
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Expires: 1998-08-30
Abstract
Abstract A high power microelectronic switching circuit is interfaced with a fiberoptic data link, whereby inductive or resistive loads up to 20 amperes are switched, with a forward voltage drop of less than one volt. An input signal of one-half milliwatt is passed to the gate of a V-MOS FET power device, which drives a PNP output transistor to switch a power supply to a circuit load.
Inventors
- 👤 Joe D. Mings
- 👤 Manuel L. Torreno, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:22
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/51; H03K17/56; H03K17/60; H03K17/64; H03K17/687; H03K17/6877; H03K17/78; H03K17/795; H03K17/7955; B; B60; B60R; B60R16/00; B60R16/02; B60R16/03; B60R16/0315
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
115 words
An optoelectronic control system for switching power to an inductive or resistive circuit load, comprising means for generating an optical input signal, means for converting the optical signal to an electronic signal, and electronic means responsive to said electronic signal for switching a high-voltage power supply to said circuit load; said switching means including an MOS power transistor having its gate coupled to receive said electronic signal, its source grounded, and its drain coupled to the base of a PNP transistor whose emitter is coupled to said power supply, and whose collector is coupled to a circuit load requiring up to 20 amperes of current, said switching means having the capability to conduct such current.
Claim 2
Dependent Claim
115 words
An optoelectronic control system for switching power to an inductive or resistive circuit load, comprising means for generating an optical input signal, means for converting the optical signal to an electronic signal, and electronic means responsive to said electronic signal for switching a high-voltage power supply to said circuit load; said switching means including an MOS power transistor having its gate coupled to receive said electronic signal, its source grounded, and its drain coupled to the base of a PNP transistor whose emitter is coupled to said power supply, and whose collector is coupled to a circuit load requiring up to 20 amperes of current, said switching means having the capability to conduct such current.
Claim 3
Dependent Claim
13 words
A system as in claim 1 wherein said power transistor has VMOS geometry.
Claim 4
Dependent Claim
21 words
A system as in claim 2 further including a zener diode connected between the source and gate of said MOS transistor.
Claim 5
Dependent Claim
30 words
A system as in claim 3 further including a rectifier connected across the emitter and collector of said PNP transistor, to protect against reverse polarity connection of the power supply.
Claim 6
Dependent Claim
119 words
An optoelectronic control system for switching power to an inductive or resistive circuit load, comprising means for receiving an optical input signal, means for converting the optical signal to an electronic signal, and electronic means responsive to said electronic signal for switching a high-voltage power supply to said circuit load; said switching means including an MOS power transistor having its gate coupled to receive said electronics signal, its source grounded, and its drain coupled to the base of a PNP transistor whose emitter includes means for coupling to said power supply, and whose collector includes means for coupling to a circuit load requiring up to 20 amperes of current, said switching means having the capability to conduct such current.
Claim 7
Dependent Claim
119 words
An optoelectronic control system for switching power to an inductive or resistive circuit load, comprising means for receiving an optical input signal, means for converting the optical signal to an electronic signal, and electronic means responsive to said electronic signal for switching a high-voltage power supply to said circuit load; said switching means including an MOS power transistor having its gate coupled to receive said electronics signal, its source grounded, and its drain coupled to the base of a PNP transistor whose emitter includes means for coupling to said power supply, and whose collector includes means for coupling to a circuit load requiring up to 20 amperes of current, said switching means having the capability to conduct such current.
Claim 8
Dependent Claim
13 words
A system as in claim 5 wherein said power transistor has VMOS geometry.
Claim 9
Dependent Claim
21 words
A system as in claim 6 further including a zener diode connected between the source and gate of said MOS transistor.
Claim 10
Dependent Claim
30 words
A system as in claim 7 further including a rectifier connected across the emitter and collector of said PNP transistor, to protect against reverse polarity connection of the power supply.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-04-06 | 1984-10-06 | 1985-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-04-06 | 1988-10-06 | 1989-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-04-06 | 1992-10-06 | 1993-04-07 | $7700.00 | Window Closed / Lapsed |