JPS56134335A - Time mode detection equipment - Google Patents
Time mode detection equipmentInfo
- Publication number
- JPS56134335A JPS56134335A JP3667680A JP3667680A JPS56134335A JP S56134335 A JPS56134335 A JP S56134335A JP 3667680 A JP3667680 A JP 3667680A JP 3667680 A JP3667680 A JP 3667680A JP S56134335 A JPS56134335 A JP S56134335A
- Authority
- JP
- Japan
- Prior art keywords
- output
- signal
- time mode
- becomes
- frequency generator
- 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.)
- Granted
Links
- 238000001514 detection method Methods 0.000 title abstract 2
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
- G11B27/10—Indexing; Addressing; Timing or synchronising; Measuring tape travel
- G11B27/34—Indicating arrangementsĀ
Abstract
PURPOSE:To automatically detect a recording time mode exactly and also swiftly, by counting an output signal of a frequency generator for detecting the rotational frequency of a capstan motor. CONSTITUTION:A reproduction time mode is switched automatically by counting the number of pulses of an output signal of a frequency generator for detecting the rotational frequency of a capstan motor which is proportional to a traveling distance of a magnetic tape, at an interval of one control. For instance, in case of a standard time S.P mode, since the output signal of the frequency generator 6 consists of 72 pulses at a control signal interval, the output of the NAND gate 15 becomes a waveform of U. In this case, the output of the NAND gate 15 is H. A signal of U which has been obtained to the output of the gate 15 becomes a set signal to the RS-FF31, and becomes a reset signal to the RS-FF30, therefore the output of the FF31 and the output of the FF30 become H and L, respectively, and the S.P mode detection lamp 28 is lighted. According to such a constitution, it is possible to automatically detect a time mode exactly and swiftly.
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3667680A JPS56134335A (en) | 1980-03-21 | 1980-03-21 | Time mode detection equipment |
US06/208,476 US4394701A (en) | 1979-11-24 | 1980-11-19 | Recording time mode detector |
EP80304212A EP0030113B1 (en) | 1979-11-24 | 1980-11-24 | Recording-time mode detector and video tape recorder or reproducer including such a detector |
DE8080304212T DE3070130D1 (en) | 1979-11-24 | 1980-11-24 | Recording-time mode detector and video tape recorder or reproducer including such a detector |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3667680A JPS56134335A (en) | 1980-03-21 | 1980-03-21 | Time mode detection equipment |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS56134335A true JPS56134335A (en) | 1981-10-21 |
JPS6325419B2 JPS6325419B2 (en) | 1988-05-25 |
Family
ID=12476450
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3667680A Granted JPS56134335A (en) | 1979-11-24 | 1980-03-21 | Time mode detection equipment |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS56134335A (en) |
-
1980
- 1980-03-21 JP JP3667680A patent/JPS56134335A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS6325419B2 (en) | 1988-05-25 |
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