JPS56124105A - Rotary head switching circuit - Google Patents
Rotary head switching circuitInfo
- Publication number
- JPS56124105A JPS56124105A JP2828580A JP2828580A JPS56124105A JP S56124105 A JPS56124105 A JP S56124105A JP 2828580 A JP2828580 A JP 2828580A JP 2828580 A JP2828580 A JP 2828580A JP S56124105 A JPS56124105 A JP S56124105A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- output
- pulse
- terminal
- rotary head
- 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
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B15/00—Driving, starting or stopping record carriers of filamentary or web form; Driving both such record carriers and heads; Guiding such record carriers or containers therefor; Control thereof; Control of operating function
- G11B15/02—Control of operating function, e.g. switching from recording to reproducing
- G11B15/12—Masking of heads; circuits for Selecting or switching of heads between operative and inoperative functions or between different operative functions or for selection between operative heads; Masking of beams, e.g. of light beams
- G11B15/14—Masking or switching periodically, e.g. of rotating heads
Landscapes
- Television Signal Processing For Recording (AREA)
Abstract
PURPOSE:To generate a head switching pulse by the detection signal of the rotation detecting means below, by providing a set of the rotation detecting means on the disc in the switching circuit for plural rotary head output signals. CONSTITUTION:The detection pulse from single rotation detector 31 is applied to the gate-off control terminal of the first counter circuit 34 through amplifying circuit 32 and delay circuit 33 to stop the count operation of clock pulse Cp, and contents are cleared by the next pulse, and counting is started by the next pulse after this pulse. The output of the delay circuit is applied to the gate-on terminal of the second counter circuit 35 also, and clock pulse 2Cp is counted by the output of this delay circuit. The output of the delay circuit is applied to the control terminal of memory circuit 36 also to store count data of counter circuit 34, and it is applied to one terminal of comparing circuit 37. The output of counter circuit 35 is applied to the other terminal of comparing circuit 37, and the output of this comparing circuit is obtained at output terminal 38.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2828580A JPS56124105A (en) | 1980-03-06 | 1980-03-06 | Rotary head switching circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2828580A JPS56124105A (en) | 1980-03-06 | 1980-03-06 | Rotary head switching circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS56124105A true JPS56124105A (en) | 1981-09-29 |
Family
ID=12244327
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2828580A Pending JPS56124105A (en) | 1980-03-06 | 1980-03-06 | Rotary head switching circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS56124105A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0239572B1 (en) * | 1984-10-05 | 1990-07-25 | Deutsche Thomson-Brandt GmbH | Process for generating the head switching signal and the vertical synchronization signal in video recorders |
-
1980
- 1980-03-06 JP JP2828580A patent/JPS56124105A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0239572B1 (en) * | 1984-10-05 | 1990-07-25 | Deutsche Thomson-Brandt GmbH | Process for generating the head switching signal and the vertical synchronization signal in video recorders |
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