JPS57190342A - Function trimming device - Google Patents
Function trimming deviceInfo
- Publication number
- JPS57190342A JPS57190342A JP56074317A JP7431781A JPS57190342A JP S57190342 A JPS57190342 A JP S57190342A JP 56074317 A JP56074317 A JP 56074317A JP 7431781 A JP7431781 A JP 7431781A JP S57190342 A JPS57190342 A JP S57190342A
- Authority
- JP
- Japan
- Prior art keywords
- substrate
- temperature
- variation
- trimming
- frequency
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Abstract
PURPOSE: To obtain a circuit substrate with high accuracy of characteristics eliminating the variation in the substrate due to the variation of temperature, by a method wherein a thermal sensor is attached to the substrate to be subjected the function trimming, and the trimming is performed by matching the reference value to the temperature variation of the substrate.
CONSTITUTION: Temperature of a circuit substrate 1 is detected by a sensor 13 attached to the substrate 1, and the reference value of a voltage controlling type oscillator 15 is controlled through an amplifier 14 by the output of the sensor 13 proportional to the temperature detected. The oscillator outputs a frequency f0 at the room temperature T0 and the frequency changes Δf by the decrease of 1°C. During the trimming, a solenoid 5 is controlled by the output of a comparator 4 comparing the frequency generated from the substrate 1 with the reference valve corresponding to the temperature. As a result, the amount of almina powder 7 ejected by a nozzle 6 is controlled to trimming the value matched to the temperature of the substrate 1. Thus at the time when the temperature of the substrate, which is lowered by the ejection of the powder, is recovered to the room temperature, the variation of the characteristics is eliminated and the desired frequency is generated from the circuit on the substrate.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56074317A JPS57190342A (en) | 1981-05-19 | 1981-05-19 | Function trimming device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56074317A JPS57190342A (en) | 1981-05-19 | 1981-05-19 | Function trimming device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS57190342A true JPS57190342A (en) | 1982-11-22 |
Family
ID=13543615
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP56074317A Pending JPS57190342A (en) | 1981-05-19 | 1981-05-19 | Function trimming device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57190342A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02286356A (en) * | 1989-04-28 | 1990-11-26 | Hitachi Ltd | Trimming apparatus for heat-sensitive head |
-
1981
- 1981-05-19 JP JP56074317A patent/JPS57190342A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02286356A (en) * | 1989-04-28 | 1990-11-26 | Hitachi Ltd | Trimming apparatus for heat-sensitive head |
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