| 摘要 |
PURPOSE:To improve the conversion efficiency, by providing a circuit, which reflects totally a high frequency, in the output side of a mixing circuit for conversion from the high frequency to an intermediate frequency. CONSTITUTION:The high frequency signal applied to a high frequency input terminal 2 becomes a waveform switched with a local oscillation wave by the local oscillation wave signal, which is applied to a local oscillation wave input terminal 1, and diodes 5 and 6. Intermediate frequency components are extracted from this waveform by a coil 7 and a capacitor 8. A high frequency outputted to the output side is reflected totally by a line 12 of the 1/4 wavelength of the signal wavelength of the high frequency and a series resonance circuit 11 and is returned to the mixing circuit again, thus improving the conversion efficiency. |
