EP0108408A2
Expired / Lapsed
EP
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Temperature compensating voltage generator circuit
Assignee: Fujitsu Ltd
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Filing: 1981-04-24
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Granted: —
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Expires: 2001-04-24
Abstract
Abstract A temperature compensating voltage generator circuit for compensating temperature characteristics of an electric circuit whose electrical characteristic varies in accordance with the change of the ambient temperature and whose electrical characteristic can be changed or controlled by a control voltage, the temperature compensating voltage generator circuit comprising a plurality of temperature sensitive resistor circuits, a plurality of diode circuits and one or more resistor circuits, a temperature compensating voltage from the temperature compensating voltage generator circuit being independently adjustable at each predetermined temperature.
Inventors
- 👤 Takuro Oguchi
- 👤 Zenichi Ohsawa
- 👤 Shinichi Murai
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 15:05
CPC Classifications
G; G05; G05F; G05F1/00; G05F1/10; G05F1/46; G05F1/462; G05F1/463; H; H03; H03F; H03F1/00; H03F1/30; H03F1/302; H03L; H03L1/00; H03L1/02; H03L1/022; H03L1/023; H03B; H03B5/00; H03B5/30; H03B5/32; H03B5/36; H03B5/362; H03B5/366; H03B5/368; Y; Y10; Y10S; Y10S323/00; Y10S323/907
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
98 words
A temperature compensating voltage generator circuit for compensating temperature characteristics of an electric circuit whose electrical characteristic can be controlled by a control voltage, which comprises: a plurality of voltage dividers each of which comprises a resistor circuit and a temperature sensitive circuit; a plurality of differential amplifiers each of which receives an output voltage from one of said voltage dividers; a plurality of level adjusting circuits for adjusting levels of output voltages from said differential amplifiers; and a combining circuit which combines output voltages from said level adjusting circuits in order to generate a temperature compensating voltage.
Claim 2
Dependent Claim
98 words
A temperature compensating voltage generator circuit for compensating temperature characteristics of an electric circuit whose electrical characteristic can be controlled by a control voltage, which comprises: a plurality of voltage dividers each of which comprises a resistor circuit and a temperature sensitive circuit; a plurality of differential amplifiers each of which receives an output voltage from one of said voltage dividers; a plurality of level adjusting circuits for adjusting levels of output voltages from said differential amplifiers; and a combining circuit which combines output voltages from said level adjusting circuits in order to generate a temperature compensating voltage.
Claim 3
Dependent Claim
45 words
A tempemture compensating voltage generator circuit as claimed in claim 1, wherein said temperature compensating voltage generator circuit further comprises a voltage dividing circuit consisting of a plurality of resistor circuits, the output voltage from said voltage dividing circuit being supplied to said combining circuit.
Claim 4
Dependent Claim
27 words
A temperature compensating voltage generator circuit as claimed in claim 2, wherein said voltage dividing circuit consisting of a plurality of resistor circuits comprises an adjustable resistor.
Claim 5
Dependent Claim
33 words
A temperature compensating voltage generator circuit as claimed in claim 1, wherein said temperature compensating voltage generator circuit further comprises a plurality of diodes connected between said voltage dividers and said differential amplifiers.
Claim 6
Dependent Claim
38 words
A temperature compensating voltage generator circuit as claimed in claim 4, wherein an output voltage from each of said voltage dividers falls or rises so as to turn on one of said diodes in a predetermined temperature range.
Claim 7
Dependent Claim
29 words
A temperature compensating voltage generator circuit as claimed in any one of the preceding claims, wherein said temperature sensitive resistor circuit comprises a negative temperature coefficient temperature sensitive resistor.
Claim 8
Dependent Claim
30 words
A temperature compensating voltage generator circuit as claimed in any one of claims 1 to 5, wherein said temperature sensitive resistor circuit comprises a positive temperature coefficient temperature sensitive resistor.
Claim 9
Dependent Claim
43 words
A temperature compensating voltage generator circuit as claimed in any one of claims 1 through to 5, wherein said temperature sensitive resistor circuit comprises a series connection of a negative temperature coefficient temperature sensitive resistor and a positive temperature coefficient temperature sensitive resistor.
Claim 10
Dependent Claim
26 words
A temperature compensating voltage generator circuit as claimed in claim 8, wherein the resistance of said temperature sensitive resistor circuit decreases in a predetermined temperature range.
References Cited (Backward Citations)
No citation records indexed.
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