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21.
公开(公告)号:US4497004A
公开(公告)日:1985-01-29
申请号:US384742
申请日:1982-06-02
申请人: Akira Shibata , Makoto Konosu , Teizo Tamura , Koichi Hirose , Kuniaki Miura , Noboru Kojima , Keiichi Komatsu
发明人: Akira Shibata , Makoto Konosu , Teizo Tamura , Koichi Hirose , Kuniaki Miura , Noboru Kojima , Keiichi Komatsu
CPC分类号: G11B20/02 , H04N5/9315 , H01F2038/143
摘要: A picture reproducing apparatus for a helical scanning video tape recorder including an impedance transformer; a video head connected to the input of the impedance transformer; a resonance circuit connected to the output of the impedance transformer; a pre-amplifier connected to the output of the resonance circuit; a feedback resistor connected between the junction of the pre-amplifier and resonance circuit and the output of the pre-amplifier; and an output terminal connected to the output of the pre-amplifier. The impedance transformer has the output impedance four times as high as the input impedance thereof.
摘要翻译: 一种用于包括阻抗变换器的螺旋扫描磁带录像机的图像再现装置; 连接到所述阻抗变换器的输入的视频头; 连接到所述阻抗变换器的输出的谐振电路; 连接到谐振电路的输出的前置放大器; 连接在前置放大器和谐振电路的接点与前置放大器的输出端之间的反馈电阻器; 以及连接到前置放大器的输出端的输出端子。 阻抗变压器的输出阻抗为输入阻抗的四倍。