发明名称 |
AMPLITUDE ADJUSTING EQUIPMENT IN A SIGNAL TRANSLATION LINE |
摘要 |
The circuit used for a contrast-adjusting circuit of resistor division type in which a video signal is applied across a pair of series-connected resistors and an output is produced from the junction point of the two resistors. At least one of the resistors is used as a variable resistor. The amplitude-adjusting circuit comprises a current source for supplying a constant current steadily between the terminals of the variable resistor, a high-gain amplifier for controlling the resistance value of the variable resistor, and a filter for separating the video signal component from the change of the value of the variable resistor represented by a voltage change.
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申请公布号 |
KR900002307(B1) |
申请公布日期 |
1990.04.10 |
申请号 |
KR19840001045 |
申请日期 |
1984.03.02 |
申请人 |
HITACHI LTD. |
发明人 |
OSAWA MICHITAKA;FUNADA ETUO;MIYAJIMA YUKIHIRO;MAEKAWA HITOZU;ANDO KUNIO |
分类号 |
H04N5/57;H04N9/64;(IPC1-7):H04N5/57 |
主分类号 |
H04N5/57 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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