发明授权
- 专利标题： Television receiver I. F. circuitry
- 专利标题（中）： 电视接收机I.电路
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申请号： US583855申请日： 1975-06-04
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公开(公告)号： US3947629A公开(公告)日： 1976-03-30
- 发明人: Toshihide Tanaka , Seiji Fujisawa , Susumu Ide
- 申请人： Toshihide Tanaka , Seiji Fujisawa , Susumu Ide
- 申请人地址： JA Osaka
- 专利权人： Matsushita Electric Industrial Company, Ltd.
- 当前专利权人： Matsushita Electric Industrial Company, Ltd.
- 当前专利权人地址： JA Osaka
- 优先权： JA47-66121 19720630
- 主分类号： H03D7/12
- IPC分类号： H03D7/12 ; H04N5/44 ; H04B1/16
摘要：
A television receiver comprising a first printed circuit board having a helical resonator filter, an adjacent channel trap circuit and an impedance converter circuit for providing a reduced output impedance, the first printed circuit board being secured to the tuner casing, and a second printed circuit board having first and subsequent i-f amplifier stages, the two printed circuit boards being connected to each other, whereby good skirt characteristics can be simply obtained. Also, no overall adjustment is required but the tuner and i-f amplifier may be adjusted separately, thus providing improved serviceability.
公开/授权文献
- USPP7921P Carnation named Stapitros 公开/授权日：1992-07-21
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