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2. 发明公开

EP0118727A3 Amplitude adjusting equipment in a signal translation line 失效
标题翻译：信号转换线路中的调制设备
公开(公告)号：EP0118727A3
公开(公告)日：1986-12-10
申请号：EP84101056
申请日：1984-02-02
申请人： HITACHI, LTD.
发明人： Osawa, Michitaka , Funada, Etuo , Miyajima, Hiroyuki , Maekawa, Hitoshi , Ando, Kunio
IPC分类号： H04N05/48 , H03F01/00
CPC分类号： H04N9/648
摘要： An amplitude-adjusting 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 (23,251) 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 (29) for controlling the resistance value of the variable resistor, and a filter (31, 33) for separating the video signal component from the change of the value of the variable resistor represented by a voltage change, and introducing the resistance change to the high-gain differential amplifier.

3. 发明公开

EP0077565A3 Horizontal deflection circuit 失效
标题翻译：水平偏转电路
公开(公告)号：EP0077565A3
公开(公告)日：1984-04-18
申请号：EP82109640
申请日：1982-10-19
申请人： Hitachi, Ltd.
发明人： Maekawa, Hitoshi , Osawa, Michitaka , Ando, Kunio
IPC分类号： H03K04/64
CPC分类号： H03K4/64
摘要： A horizontal deflection circuit comprises a horizontal oscillator circuit (2), a drive transistor (4), a horizontal output transistor (51) driven by the output of the drive transistor, a timing circuit (7) for setting a timing delayed by about one fourth the horizontal scanning period from the terminating point of the flyback pulse generated at the collector of the horizontal output transistor, a phase difference detector circuit (9) for detecting the phase difference between the leading edge of the collector pulse of the horizontal drive transistor and the timing set by the timing circuit, and a pulse duration variable output circuit (3) triggered by the output of the horizontal oscillator circuit and with the output pulse duration thereof controlled by the output of the phase difference detector circuit. The horizontal drive transistor is driven by the output of the pulse duration variable output circuit, so that the leading edge of the collector pulse of the horizontal drive transistor is rendered to coincide with the timing set by the timing circuit.

4. 发明公开

EP0118727A2 Amplitude adjusting equipment in a signal translation line 失效
标题翻译：装置，用于在一个信号转换线振幅调整。
公开(公告)号：EP0118727A2
公开(公告)日：1984-09-19
申请号：EP84101056.4
申请日：1984-02-02
申请人： HITACHI, LTD.
发明人： Osawa, Michitaka , Funada, Etuo , Miyajima, Hiroyuki , Maekawa, Hitoshi , Ando, Kunio
IPC分类号： H04N5/48 , H03F1/00
CPC分类号： H04N9/648
摘要： An amplitude-adjusting 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 (23,251) 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 (29) for controlling the resistance value of the variable resistor, and a filter (31, 33) for separating the video signal component from the change of the value of the variable resistor represented by a voltage change, and introducing the resistance change to the high-gain differential amplifier.

5. 发明公开

EP0077565A2 Horizontal deflection circuit 失效
标题翻译：水平偏转电路。
公开(公告)号：EP0077565A2
公开(公告)日：1983-04-27
申请号：EP82109640.1
申请日：1982-10-19
申请人： Hitachi, Ltd.
发明人： Maekawa, Hitoshi , Osawa, Michitaka , Ando, Kunio
IPC分类号： H03K4/64
CPC分类号： H03K4/64
摘要： A horizontal deflection circuit comprises a horizontal oscillator circuit (2), a drive transistor (4), a horizontal output transistor (51) driven by the output of the drive transistor, a timing circuit (7) for setting a timing delayed by about one fourth the horizontal scanning period from the terminating point of the flyback pulse generated at the collector of the horizontal output transistor, a phase difference detector circuit (9) for detecting the phase difference between the leading edge of the collector pulse of the horizontal drive transistor and the timing set by the timing circuit, and a pulse duration variable output circuit (3) triggered by the output of the horizontal oscillator circuit and with the output pulse duration thereof controlled by the output of the phase difference detector circuit. The horizontal drive transistor is driven by the output of the pulse duration variable output circuit, so that the leading edge of the collector pulse of the horizontal drive transistor is rendered to coincide with the timing set by the timing circuit.

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