KR880018376U - 전원주파수 판별회로 - Google Patents
전원주파수 판별회로Info
- Publication number
- KR880018376U KR880018376U KR2019870002760U KR870002760U KR880018376U KR 880018376 U KR880018376 U KR 880018376U KR 2019870002760 U KR2019870002760 U KR 2019870002760U KR 870002760 U KR870002760 U KR 870002760U KR 880018376 U KR880018376 U KR 880018376U
- Authority
- KR
- South Korea
- Prior art keywords
- power frequency
- discrimination circuit
- frequency discrimination
- circuit
- power
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R23/00—Arrangements for measuring frequencies; Arrangements for analysing frequency spectra
- G01R23/02—Arrangements for measuring frequency, e.g. pulse repetition rate; Arrangements for measuring period of current or voltage
- G01R23/15—Indicating that frequency of pulses is either above or below a predetermined value or within or outside a predetermined range of values, by making use of non-linear or digital elements (indicating that pulse width is above or below a certain limit)
Landscapes
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- General Physics & Mathematics (AREA)
- Measuring Frequencies, Analyzing Spectra (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR2019870002760U KR890008733Y1 (ko) | 1987-03-04 | 1987-03-04 | 전원주파수 판별회로 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR2019870002760U KR890008733Y1 (ko) | 1987-03-04 | 1987-03-04 | 전원주파수 판별회로 |
Publications (2)
Publication Number | Publication Date |
---|---|
KR880018376U true KR880018376U (ko) | 1988-10-28 |
KR890008733Y1 KR890008733Y1 (ko) | 1989-11-30 |
Family
ID=19260283
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR2019870002760U KR890008733Y1 (ko) | 1987-03-04 | 1987-03-04 | 전원주파수 판별회로 |
Country Status (1)
Country | Link |
---|---|
KR (1) | KR890008733Y1 (ko) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101010688B1 (ko) * | 2004-02-03 | 2011-01-24 | 엘지전자 주식회사 | 입력전원의 전압 및 주파수 감지회로 |
-
1987
- 1987-03-04 KR KR2019870002760U patent/KR890008733Y1/ko not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
KR890008733Y1 (ko) | 1989-11-30 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
A201 | Request for examination | ||
E902 | Notification of reason for refusal | ||
E701 | Decision to grant or registration of patent right | ||
REGI | Registration of establishment | ||
LAPS | Lapse due to unpaid annual fee |