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MT1198F 데이터시트 PDF




TDK에서 제조한 전자 부품 MT1198F은 전자 산업 및 응용 분야에서
광범위하게 사용되는 반도체 소자입니다.


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기능 Glossary
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MT1198F 데이터시트, 핀배열, 회로
Evaluation of ceramic resonator oscillation characteristics
This paper is prepared to explain characteristics, test methods, and glossary of the oscillation circuit
composed of a CMOS inverter and ceramic resonator.
(A) Test samples
[Ceramic resonators]
We use the following two samples for evaluation:
Typical sample:
Worst sample:
sample with average resonant impedance, (TYP.)
sample with worst resonant impedance, (WST.)
[IC]
In case of providing random IC samples from IC manufacturers.
IC dependence :
Temperature dependence:
Power supply dependence:
Open loop characteristics:
Test all samples at room temperature.
Test sample with worst oscillation start voltage.
Test sample with worst oscillation start voltage.
Test sample with worst oscillation start voltage.
By combining these samples(ceramic resonator and IC),
you can find the typical and worst characteristics of the oscillation circuit.
(B) CMOS inverter characteristics
Measure a CMOS inverter's gain vs. frequency characteristics to check on the gain margin.
(C) Oscillation characteristics
Fig. 1 shows a basic oscillation circuit composed of a CMOS inverter and ceramic resonator.
Each character represents the following.
CL1:
CL2:
Rf:
Rd:
VDD:
(TA:
Input Loading Capacitor
Output Loading Capacitor
Feedback Resistor (Some Ics have built-in feedback resistor)
Damping Resistor
Power Supply Voltage
Ambient Temperature)
1




MT1198F pdf, 반도체, 판매, 대치품
(F) Power supply voltage dependence
Measure power supply voltage dependence of oscillating characteristics.
Power supply voltage conform to the IC's recommended operating range.
(G) Ambient temperature dependence
Measure ambient temperature dependence of oscillating characteristics.
Ambient temperature conform to the IC's recommended operating range.
(H) Oscillating frequency correlation
Determine the evaluated IC's oscillating frequency relative to that of TDK's standard circuit.
(HEX CMOS INVERTER 4069UBP/74HCU04 type).
( I ) Open loop characteristics
For the oscillation circuit, the following two conditions are necessary:
(1) Loop gain > 0 dB
(2) Loop phase = 360° x n (n: integer)
The oscillating conditions cannot be evaluated on a continuing basis.
(1) Information about oscillation is not available when the circuit does not oscillate.
(2) Information about modes other than the desired is not obtainable.
VDD
NETWORK ANALYZER
(OUTPUT)
Cb:0.01uF
BLOCKING CAPACITOR
NETWORK ANALYZER
(INPUT)
Rd CERAMIC RESONATOR
CL2 CL1
Fig. 4 Open loop circuit for oscillation circuit analysis
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구매 문의
일반 IC 문의 : 샘플 및 소량 구매
-----------------------------------------------------------------------

IGBT, TR 모듈, SCR 및 다이오드 모듈을 포함한
광범위한 전력 반도체를 판매합니다.

전력 반도체 전문업체

상호 : 아이지 인터내셔날

사이트 방문 :     [ 홈페이지 ]     [ 블로그 1 ]     [ 블로그 2 ]



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