JPS5637824A - Magnetic recording circuit device - Google Patents
Magnetic recording circuit deviceInfo
- Publication number
- JPS5637824A JPS5637824A JP11186079A JP11186079A JPS5637824A JP S5637824 A JPS5637824 A JP S5637824A JP 11186079 A JP11186079 A JP 11186079A JP 11186079 A JP11186079 A JP 11186079A JP S5637824 A JPS5637824 A JP S5637824A
- Authority
- JP
- Japan
- Prior art keywords
- recording signal
- transformer
- securely
- recording
- impedance
- 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
Landscapes
- Digital Magnetic Recording (AREA)
Abstract
PURPOSE: To control a recording signal level easily and securely by controlling the primary-side shunt quantity of a recording signal by varying the secondary-side impedance of a transformer in accordance with a recording signal frequency.
CONSTITUTION: Through capacitor 31, control circuit 18 extracts a recording signal of high frequency range and then generates a DC voltage that corresponds to the frequency, exercising transistors 15 and 16 that form an impedance element connected to the secondary windings 13 and 14 of transformer 12. Consequently, the impedance of the primary winding 11 of transformer 12 varies and recording current applied to recording head 2 by way of bias trapping circuit 6 also varies in accordance with the shunt quantity to winding 11 so as to adjust the substantial characteristics of equalizer amplifier 3 easily and securely. Similarly, bias current is also controlled by transformer 12', so that the recording signal level can be controlled relatively easily and securely.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11186079A JPS5637824A (en) | 1979-08-31 | 1979-08-31 | Magnetic recording circuit device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11186079A JPS5637824A (en) | 1979-08-31 | 1979-08-31 | Magnetic recording circuit device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5637824A true JPS5637824A (en) | 1981-04-11 |
Family
ID=14571967
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11186079A Pending JPS5637824A (en) | 1979-08-31 | 1979-08-31 | Magnetic recording circuit device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5637824A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61137207A (en) * | 1984-12-07 | 1986-06-24 | Canon Inc | Magnetic recorder |
-
1979
- 1979-08-31 JP JP11186079A patent/JPS5637824A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61137207A (en) * | 1984-12-07 | 1986-06-24 | Canon Inc | Magnetic recorder |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPS57138868A (en) | Voltage resonance type high frequency switching circuit | |
JPS57138867A (en) | Voltage resonance type high frequency switching circuit | |
JPS5637824A (en) | Magnetic recording circuit device | |
JPS5713965A (en) | Direct current high voltage generating device | |
JPS5725165A (en) | Dc/dc converter | |
JPS5637806A (en) | Magnetic recording circuit device | |
GB670838A (en) | Improvements in and relating to magnetic saturation devices | |
JPS5661009A (en) | Limiter circuit | |
JPS5546881A (en) | Inverter | |
JPS5668907A (en) | Magnetic recording circuit device | |
JPS5636716A (en) | Constant voltage control system | |
JPS5760265A (en) | Current voltage converter for ac input | |
JPS5497730A (en) | Current transformer | |
SU440653A1 (en) | Voltage regulating device | |
ES8300209A1 (en) | High frequency ferroresonant power supply | |
JPS5637807A (en) | Magnetic recording circuit device | |
JPS5565414A (en) | Transformer | |
JPS55140916A (en) | Inverter circuit | |
JPS5549983A (en) | Transistor inverter | |
JPS57122671A (en) | Rectifier | |
JPS5593374A (en) | High voltage circuit | |
JPS5491715A (en) | Ferro resonance transformer | |
JPS5515220A (en) | Static induction equipment | |
JPS55105412A (en) | Magnetic amplifier | |
JPS5523766A (en) | Switching-regulator-type power supply device |