US3614480A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Temperature-stabilized electronic devices
Assignee: AT&T Inc
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Filing: 1969-10-13
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Granted: 1971-10-19
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Expires: 1989-10-13
Abstract
Abstract Vanadium oxide exhibits a substantial and relatively abrupt change in conductivity as the temperature of the material is varied through a particular characteristic temperature (about 68* C.). In accordance with our invention, a vanadium oxide resistor is employed as a temperature-sensing element in the control circuit of a heater to stabilize the operating temperature of an electronic circuit at about 68* C. over a wide range of ambient temperatures.
Inventors
- 👤 Carl N Berglund
- 👤 Martin P Lepselter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:37
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/14; G; G05; G05D; G05D23/00; G05D23/19; G05D23/1906; G05D23/20; G05D23/24; H01; H01C; H01C7/00; H01C7/04; H01C7/042; H01C7/043; H01C7/047; H10; H10D; H10D89/00; H10D89/10; H10D89/105; H10W; H10W40/00
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
130 words
Apparatus for maintaining an electronic device at a stabilized elevated operating temperature comprising: A body of material including the device whose temperature is to be stabilized; Electrically energizable heat-generating means mounted in intimate thermal energy transfer relationship with the body for heating the device; and control means including temperature sensitive means connected to the heat-generating means for controlling the rate of heat generation in the heat-generating means; said temperature sensitive means comprising a resistor including material selected from the group consisting of the 3-d transition materials which exhibit a relatively abrupt change in conductivity at a transition temperature corresponding essentially to the desired elevated operating temperature, and being located to have its recited in claim 1 wherein the temperature means includes a resistor, controlled by the temperature of the body.
Claim 2
Dependent Claim
14 words
A device recited in claim 1 wherein the temperature sensitive means comprises vanadium oxide.
Claim 3
Dependent Claim
24 words
A device as recited in claim 1 wherein the temperature means includes a resistor, the operative part of which consists essentially of vanadium oxide.
Claim 4
Dependent Claim
85 words
An electronic device adapted for operation at a stabilized elevated temperature comprising: a body of material including the device whose temperature is to be stabilized; electrically energizable heat-generating means mounted in close thermal energy transfer relationship with said body for heating said body; a vanadium oxide resistor in close thermal energy transfer relationship with said body for sensing the temperature of said body; and circuit means to which said vanadium oxide resistor is connected for controlling the rate of heat generation in the heat-generating means.
Claim 5
Dependent Claim
85 words
An electronic device adapted for operation at a stabilized elevated temperature comprising: a body of material including the device whose temperature is to be stabilized; electrically energizable heat-generating means mounted in close thermal energy transfer relationship with said body for heating said body; a vanadium oxide resistor in close thermal energy transfer relationship with said body for sensing the temperature of said body; and circuit means to which said vanadium oxide resistor is connected for controlling the rate of heat generation in the heat-generating means.
Claim 6
Dependent Claim
17 words
A device as recited in claim 4 wherein the vanadium oxide resistor consists essentially of vanadium dioxide.
Claim 7
Dependent Claim
56 words
A temperature stabilized semiconductor integrated circuit device comprising in combination: a body of silicon including at least one device whose temperature is to be stabilized; and means for stabilizing the operating temperature of the device comprising electrically energizable heat-generating means in combination with a temperature sensitive means which includes a resistor consisting essentially of vanadium oxide.
Claim 8
Dependent Claim
56 words
A temperature stabilized semiconductor integrated circuit device comprising in combination: a body of silicon including at least one device whose temperature is to be stabilized; and means for stabilizing the operating temperature of the device comprising electrically energizable heat-generating means in combination with a temperature sensitive means which includes a resistor consisting essentially of vanadium oxide.
Claim 9
Dependent Claim
27 words
A device as recited in claim 6 wherein the vanadium oxide resistor comprises a relatively thin layer of vanadium oxide disposed over the surface of the body.
Claim 10
Dependent Claim
85 words
Means for stabilizing the temperature of a body of material at an elevated temperature comprising in combination: a transistor disposed in close thermal energy transfer relationship with the body for heating the body; and a vanadium oxide resistor connected in shunt with the base emitter junction of the transistor for controlling the rate of heat generation in the transistor; said vanadium oxide resistor also disposed in close thermal energy relationship with the body so that its temperature is controlled by the temperature of the body.
Claim 11
Dependent Claim
85 words
Means for stabilizing the temperature of a body of material at an elevated temperature comprising in combination: a transistor disposed in close thermal energy transfer relationship with the body for heating the body; and a vanadium oxide resistor connected in shunt with the base emitter junction of the transistor for controlling the rate of heat generation in the transistor; said vanadium oxide resistor also disposed in close thermal energy relationship with the body so that its temperature is controlled by the temperature of the body.
Claim 12
Dependent Claim
33 words
Apparatus as recited in claim 8 further comprising means for biasing the transistor and the resistor by an amount sufficient to elevate the temperature of the body to the vanadium oxide transition temperature.
Claim 13
Dependent Claim
130 words
An electronic device adapted for operation at a stabilized elevated temperature comprising: A body of material including the device whose operating temperature is to be stabilized; Electrically energizable heat-generating means mounted in close thermal energy transfer relationship with said body for heating said body; temperature sensitive means connected to the heat-generating means and mounted in close thermal energy transfer relationship with the body for controlling the rate of heat generation in the heat-generating means, the temperature sensitive means including a resistor, an operative part of which is a material which exhibits a conductivity transition at a predictable transition temperature; and means for biasing the heat-generating means and the resistor by an amount sufficient to elevate the temperature of the body, the heat-generating means, and the resistor to the transition temperature.
Claim 14
Dependent Claim
130 words
An electronic device adapted for operation at a stabilized elevated temperature comprising: A body of material including the device whose operating temperature is to be stabilized; Electrically energizable heat-generating means mounted in close thermal energy transfer relationship with said body for heating said body; temperature sensitive means connected to the heat-generating means and mounted in close thermal energy transfer relationship with the body for controlling the rate of heat generation in the heat-generating means, the temperature sensitive means including a resistor, an operative part of which is a material which exhibits a conductivity transition at a predictable transition temperature; and means for biasing the heat-generating means and the resistor by an amount sufficient to elevate the temperature of the body, the heat-generating means, and the resistor to the transition temperature.
Claim 15
Dependent Claim
63 words
Apparatus as recited in claim 10 wherein the resistor is coupled to the heat-generating means in such a way that heat is generated when the temperature of the resistor is substantially below the transition temperature and heat is not generated when the temperature of the resistor is substantially above the transition temperature so that the operating temperature is stabilized about the transition temperature.
Claim 16
Dependent Claim
25 words
Apparatus as recited in claim 11 wherein the conductivity transition material is a film of vanadium oxide having a transition temperature at about 68* C.
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) | 1974-10-18 | 1975-04-19 | 1975-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-18 | 1979-04-19 | 1979-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-18 | 1983-04-19 | 1983-10-19 | $7700.00 | Window Closed / Lapsed |