发明名称 |
FREQUENCY CONVERSION CIRCUIT |
摘要 |
PURPOSE:To improve intermodulation and cross modulation characteristics, by picking up an intermediate frequency signal through the connection of a tank circuit tuned to the intermediate frequency to a collector of a grounded-base type transistor (TR). CONSTITUTION:The ratio of the current values of a mixing TRQ1 and intermediate frequency amplifying TRQ2 is changed for the application. A constant current source CC is provided between a connecting point between the TRQ1 and the TRQ2 and ground to increase a collector current Ic of the TRQ2. Thus, >=6mA current can be supplied to the TRQ1 and >=10mA current to the TRQ2, allowing to avoid side effects nearly. |
申请公布号 |
JPS5793705(A) |
申请公布日期 |
1982.06.10 |
申请号 |
JP19800171226 |
申请日期 |
1980.12.03 |
申请人 |
MATSUSHITA DENKI SANGYO KK |
发明人 |
USUI AKIRA;KATAYAMA KENJI;AYA SADAKAZU;WADA AKIHISA;TERAOKA MASAKAZU;NISHIGUCHI TADAAKI |
分类号 |
H03D7/12;(IPC1-7):03D7/12 |
主分类号 |
H03D7/12 |
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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