A TURNER OF PAL/SECAM TYPE

摘要

The tunner circuit selects PAL signals or SECAM signals by using upper heterodyne method. The IF signals are obtained from a mixer(9) mixing the output signals of a local oscillator(10) into the output signals of a UHF receiving part(I) or the output signals of a VHF receivity part(II). PAL/SECAM selecting part(III) employs a mixer(14) for inverting the SIF and VIF signals of the lower-band VHF of the SECAM signals.