 High frequency voltage comparator circuit |
| It is therefore an object of the present invention to provide a voltage comparator circuit which ... |
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| Fast analog-digital converter with parallel structure |
| An object of the present invention therefore comprises the making of an analog/digital converter ... |
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| Averaging flash analog-to-digital converter |
| FIG. 1 is a block diagram of a conventional flash-type ADC where an input signal IN is applied to ... |
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| A/D converter circuit |
| It is an object of the present invention to provide an A/D converter circuit capable of improving ... |
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| Broadband omnidirectional microwave antenna for minimizing radiation toward the upper hemisphere |
| It is a primary object of the present invention to provide an improved omnidirectional antenna ... |
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| Circuit for reducing differential nonlinearities in multi-stage digital-to-analog converters |
| In the following detailed description and in the several figures of the drawing, like elements are ... |
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| D/A conversion circuit having n switches, n capacitors and a coupling capacitor |
| The present invention has been made in view of the above problems, and has an object to provide a D/... |
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| Pipelined analog-to-digital converters with gain-matching structures |
| The present invention is directed to pipelined ADC system embodiments which provide gain matching ... |
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Temperature sensitive amorphous magnetic alloy
| Details |
Inventors: Inomata, Koichiro; Murata, Shinichi;
Assignee: Tokyo Shibaura Denki Kabushiki Kaisha (Kawasaki, JP)
Primary Examiner:
Assistant Examiner:
Attorney, Agent or Firm:
A detector is disclosed including a temperature sensitive amorphous magnetic alloy which shows a Curie point of not higher than 200.degree. C. and whose composition is represented by the formula: (M.sub.1-a Ni.sub.a).sub.100-z X.sub.z wherein M=Co or Fe; X=at least one of P, B, C and Si; 0.2.ltoreq.a.ltoreq.0.8 when M is Co, or 0.4.ltoreq.a.ltoreq.0.9 when M is Fe; and 15.ltoreq.z.ltoreq.30. |
|
DETAILED DESCRIPTION We claim: 1.
A method for detecting a predetermined temperature, comprising the steps of: (a) by electromagnetically exciting a magnetic core element, inducing a voltage in electrically conductive means, which core element is comprised of a temperature sensitive amorphous magnetic alloy having a Curie point at approximately said predetermined temperature, which Curie point is not higher than 200.
degree.
C.
, said alloy consisting essentially of a composition represented by the formula (M.
sub.
1-a-b Ni.
sub.
a Cr.
sub.
b).
sub.
100-z X.
sub.
z wherein M represents a cobalt atom or an iron atom; X represents at least one of a phorophorous atom, a boron atom, a carbon atom and a silicon atom; a is a numeral ranging between 0.
2 and 0.
8 inclusive when M is Co, or a is a numeral ranging between 0.
4 and 0.
9 inclusive when M is Fe; b is a numeral ranging between 0 and 0.
05, such that the sum of a and b does not exceed 0.
8 when M is cobalt or 0.
9 when M is iron; and z is a numeral ranging between 15 and 30 inclusive, and wherein a and z are selected such that the temperature difference between the temperature showing the maximum value of effective permeability at 10 kHz and the temperature of the Curie point is less than 10 centigrade degrees; (b) heating said core to a temperature above said predetermined temperature; and then (c) measuring an abrupt decrease in said voltage.
2.
A temperature-activated switch device, comprising (1) a magnetic core which has a magnetic permeability that varies markedly at a predetermined temperature, and (2) means for exciting said core in order to produce an induced voltage, wherein said core comprises a temperature sensitive amorphous magnetic alloy having a Curie point at approximately said predetermined temperature, which Curie point is not higher than 200.
degree.
C.
, said alloy consisting essentially of a composition represented by the formula M.
sub.
1-a-b Ni.
sub.
a Cr.
sub.
b).
sub.
100-z X.
sub.
z wherein M represents a cobalt atom or an iron atom; X represents at least one of a phosphorus atom, a boron atom, a carbon atom and a silicon atom; a is a numeral ranging between 0
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