Title:
TEMPERATURE SENSING RESISTANCE NETWORK AND TEMPERATURE COMPENSATED CRYSTAL OSCILLATOR USING SAME
Document Type and Number:
Japanese Patent JP3218106
Kind Code:
B2
Abstract:
PURPOSE: To improve workability by serially inserting a capacitor in a resistance parallel-connected with a temperature sensing resistance and forming a temperature sensing resistance network.
CONSTITUTION: Resistances R1, R2 are made adjustable chip resistances and a DC blocking capacitor C3 is serially connected with the resistance R1 of the temperature sensing resistance network RN1 in a low temperature compensating part 2. If the temperature sensing resistance network RN1 is like this, the resistance R1 and a thermistor RT1 is directly interrupted by the capacitor C3, and the true value of the resistance R1 can be measured if the terminals (xy) of the resistance R1 are measured. In a temperature compensating circuit 1, the both of resistance values can be actually measured after the R1 and R2 are mounted and an accurate reference resistance value which is made a reference compensating characteristic can be calculated from the resistance value and compensating value. As the both of the values are made adjustable chip resistances, the substituting works of the resistances R1, R2 are unnecessitated and workability can be improved.
Inventors:
Takeo Oida
Hiroaki Mizumura
Yoshinori Ishido
Hiroaki Mizumura
Yoshinori Ishido
Application Number:
JP36118692A
Publication Date:
October 15, 2001
Filing Date:
December 28, 1992
Export Citation:
Assignee:
Nippon Denpa Industry Co., Ltd.
International Classes:
H03B5/32; H03L1/00; (IPC1-7): H03B5/32
Domestic Patent References:
| JP4283321A | ||||
| JP63104672A | ||||
| JP2207602A |
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