JPS5583066A - Function generator - Google Patents
Function generatorInfo
- Publication number
- JPS5583066A JPS5583066A JP15662878A JP15662878A JPS5583066A JP S5583066 A JPS5583066 A JP S5583066A JP 15662878 A JP15662878 A JP 15662878A JP 15662878 A JP15662878 A JP 15662878A JP S5583066 A JPS5583066 A JP S5583066A
- Authority
- JP
- Japan
- Prior art keywords
- change
- fetqa
- wqb
- resistance values
- polygonal
- 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
- Fax Reproducing Arrangements (AREA)
Abstract
PURPOSE: To electrically change the grades of polygons by letting the impedance elements which determine the grades of the respective plural polygonal points for determining the characteristic curves of the output video signal levels for input image information be controllable impedance elements whose impedances change in response to the control signals.
CONSTITUTION: A polygonal line function generator 11 is constituted by operational amplifiers OP1WOP3, variable resistors VR1WVRBN, diodes D1WDn, P-FETQA1W AAB, N-FETQB1WQBn and amplifiers AM1WAMn and the P-FETQA1WQAn and N-FETQN1WQBn are used as controllable impedances. The voltage at the respective polygonal points are determined by regulating variable resistances VRB1WVRBn. The inclinations at the polygonal points are determined by the ratios between the resistance values of the P-FETQA1WQAn and the resistance values of the N- FETQB1WQBn but the resistance values change in the opposite directions with the change in the bias voltage to be applied to their bases and therefore by changing the bias levels the inclinations of the respective polygonal points change.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15662878A JPS5583066A (en) | 1978-12-17 | 1978-12-17 | Function generator |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15662878A JPS5583066A (en) | 1978-12-17 | 1978-12-17 | Function generator |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5583066A true JPS5583066A (en) | 1980-06-23 |
Family
ID=15631844
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15662878A Pending JPS5583066A (en) | 1978-12-17 | 1978-12-17 | Function generator |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5583066A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5776559A (en) * | 1980-10-30 | 1982-05-13 | Canon Inc | Processing method of intermediate tone image |
JPS5776560A (en) * | 1980-10-30 | 1982-05-13 | Canon Inc | Processing method of intermediate tone image |
-
1978
- 1978-12-17 JP JP15662878A patent/JPS5583066A/en active Pending
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5776559A (en) * | 1980-10-30 | 1982-05-13 | Canon Inc | Processing method of intermediate tone image |
JPS5776560A (en) * | 1980-10-30 | 1982-05-13 | Canon Inc | Processing method of intermediate tone image |
JPH0219669B2 (en) * | 1980-10-30 | 1990-05-02 | Canon Kk | |
JPH0219668B2 (en) * | 1980-10-30 | 1990-05-02 | Canon Kk |
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