| 摘要 |
<p>PURPOSE:To reduce an undesired radiation, a mutual modulation and to enhance a conversion gain by providing a wiring layer grounded in an external circuit between a transistor which inputs a local oscillation output and a transistor which inputs a signal. CONSTITUTION:Emitters of a first transistor Tr1 and a second transistor Tr2 are connected in a differential type in package, a local oscillation output is input to either the first or second transistor, connectors are connected to the connecting parts of emitters, and a differential circuit element having a third transistor Tr3 which inputs a signal is provided. In this case, wiring layers 1042, 1043 grounded in an external circuit are provided between the transistor which inputs a signal and the transistor which inputs a signal. Thus, an output from a local oscillator can be raised to enhance a conversion gain.</p> |
