JPS5592983A - Type mark detection circuit - Google Patents
Type mark detection circuitInfo
- Publication number
- JPS5592983A JPS5592983A JP146679A JP146679A JPS5592983A JP S5592983 A JPS5592983 A JP S5592983A JP 146679 A JP146679 A JP 146679A JP 146679 A JP146679 A JP 146679A JP S5592983 A JPS5592983 A JP S5592983A
- Authority
- JP
- Japan
- Prior art keywords
- type mark
- variation
- output voltage
- comparator
- waveform
- 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
Abstract
PURPOSE: To reduce variation in type mark signal due to variation in pickup output voltage by inputting the output of type mark detecting pickup to a comparator by way of a phase advance circuit and amplifier circuit.
CONSTITUTION: Output voltage (a) of a type mark detecting pickup, after being passed through phase advance circuit 8 and amplified by amplifier circuit 9, is transmitted to comparator 10, where it is made into pulses by waveform-shaping. In this case, the amplification degree of the waveform of output voltage (a) is increased at phase angles of approximate 0° and 180° and decreased at approximate 90° and 270°. Namely, the gradient of the waveform when crossing the zero potential is made steep to reduce an influence of voltage amplitude even if it would be sliced at a level higher by the hysteresis voltage of comparator 10. Consequently, variation in timing due to output voltage variation can be reduced to prevent print quality from lowering.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP146679A JPS5592983A (en) | 1979-01-09 | 1979-01-09 | Type mark detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP146679A JPS5592983A (en) | 1979-01-09 | 1979-01-09 | Type mark detection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5592983A true JPS5592983A (en) | 1980-07-14 |
Family
ID=11502233
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP146679A Pending JPS5592983A (en) | 1979-01-09 | 1979-01-09 | Type mark detection circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5592983A (en) |
-
1979
- 1979-01-09 JP JP146679A patent/JPS5592983A/en active Pending
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