JPS5573970A - Automatic gain control system - Google Patents
Automatic gain control systemInfo
- Publication number
- JPS5573970A JPS5573970A JP14686778A JP14686778A JPS5573970A JP S5573970 A JPS5573970 A JP S5573970A JP 14686778 A JP14686778 A JP 14686778A JP 14686778 A JP14686778 A JP 14686778A JP S5573970 A JPS5573970 A JP S5573970A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- output
- servo
- gain control
- signal
- 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
Landscapes
- Moving Of The Head To Find And Align With The Track (AREA)
- Control Of Amplification And Gain Control (AREA)
- Adjustment Of The Magnetic Head Position Track Following On Tapes (AREA)
Abstract
PURPOSE: To ensure the quick and high-precision automatic gain control by applying the fixed gain control voltage to position detection circuit at the record information region and then applying the signal amplitude fluctuation component detected from the output of the servo signal to the fixed gain control voltage at the servo region.
CONSTITUTION: The signal of magnetic head 2 is amplified 3 to be sent to position detection circuit 4 and the record information circuit. The output of circuit 4 is supplied to servo signal peak detection circuit 5, and detection peak value 13a and 13b are detected from the position detection signals in the servo region via gate pulses 12aW12b for detection of the servo signal peak to be applied to gain control signal generation circuit 9 after addition/amplification 6. At the same time, the output of track address 7 undergoes D/A conversion 8, and the output is supplied to circuit 9. And the output of circuit 9 is controlled by the signal sent from gate circuit 10 where the decision is given between the record information region and the servo region. The output of converter 8 is applied to circuit 4 at the record information region; while the output of circuit 6 is applied to circuit 4 at the servo region respectively. Thus the high-precision control is secured for the gain.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14686778A JPS5573970A (en) | 1978-11-28 | 1978-11-28 | Automatic gain control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14686778A JPS5573970A (en) | 1978-11-28 | 1978-11-28 | Automatic gain control system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5573970A true JPS5573970A (en) | 1980-06-04 |
| JPS6145300B2 JPS6145300B2 (en) | 1986-10-07 |
Family
ID=15417353
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14686778A Granted JPS5573970A (en) | 1978-11-28 | 1978-11-28 | Automatic gain control system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5573970A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57186270A (en) * | 1981-04-27 | 1982-11-16 | Iomega Corp | Head position control method of and apparatus for disc driving mechanism |
| US5455720A (en) * | 1991-10-01 | 1995-10-03 | Fujitsu Limited | Offset and gain error discriminator |
| US6747713B1 (en) | 1999-02-15 | 2004-06-08 | Nec Lcd Technologies, Ltd. | Structure for mounting a liquid crystal module, and portable data terminal or information processing equipment using the structure |
-
1978
- 1978-11-28 JP JP14686778A patent/JPS5573970A/en active Granted
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57186270A (en) * | 1981-04-27 | 1982-11-16 | Iomega Corp | Head position control method of and apparatus for disc driving mechanism |
| JPH0237025B2 (en) * | 1981-04-27 | 1990-08-22 | Iomega Corp | |
| US5455720A (en) * | 1991-10-01 | 1995-10-03 | Fujitsu Limited | Offset and gain error discriminator |
| US6747713B1 (en) | 1999-02-15 | 2004-06-08 | Nec Lcd Technologies, Ltd. | Structure for mounting a liquid crystal module, and portable data terminal or information processing equipment using the structure |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6145300B2 (en) | 1986-10-07 |
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