PURPOSE: To simplify the circuit constitution by using one FET to apply two operations such as frequency multiplication and frequency conversion.
CONSTITUTION: After a local oscillation signal is divided into two by signals having a phase difference of 90° by a 90° distributer 5, they are doubled by field effect transistors (TRs) 6,7, then a two multiple signal having a phase difference by 180° is obtained but it is not ideally outputted because being cancelled by an in-phase synthesizer 9. The input signals, however, are fed to the field effect TRs by a phase difference of 180°, and when they are mixed by double-frequency signals having a phase difference of 180°, the in-phase frequency conversion signal is obtained and combined in phase by an in-phase synthesizer 9 and the result is outputted. That is, since the frequency multiplication and the frequency conversion are applied by the field effect TRs 6,7, the circuit constitution is simplified.
TOZAWA YOSHIHARU
TAGAMI KATSUYA
FURUKAWA HIDETO
