发明名称 |
Low-noise TV tuner - has separating stage transistor amplifier between input circuit and tunable band filter |
摘要 |
<p>The low and constant signal-to-noise ratio of the t.v. tuner ensures operation in all conditions of reception including localities with a weak signal. The unit does not produce interferences for other equipment and it includes a tunable input followed by a first stage connected to a mixer. The latter is preceded by an adjustable band filter with a transistor amplifier acting as a separation stage. The transistor operates with a common base allowing a high current while the first stage includes a dual gate MOSFET.</p> |
申请公布号 |
DE2907455(A1) |
申请公布日期 |
1980.08.28 |
申请号 |
DE19792907455 |
申请日期 |
1979.02.26 |
申请人 |
BLAUPUNKT-WERKE GMBH |
发明人 |
HEINDORF,WILLI;KATTHAEN,WALTER,ING.;LUBER,GUENTER;MALY,HANS,ING. |
分类号 |
H03F3/193;H04B15/06;(IPC1-7):H04B15/06;H04N5/44;H04B1/28 |
主分类号 |
H03F3/193 |
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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