Frequency translation, such as frequency up conversion of a video baseband
or intermediate frequency to a desired frequency division broadcast
channel, is provided utilizing a single sideband or image reject mixer
and filtering having relaxed selectivity requirements. According to a
preferred embodiment, a first single sideband mixer accepts an input
signal at an intermediate frequency and up converts this signal to a high
intermediate frequency. The image rejection provided by the single
sideband mixer in combination with simple filtering provide sufficient
signal quality to achieve desired levels of desired signal isolation,
such as on the order of 40 dB. Preferably, a second single sideband mixer
accepts the high intermediate frequency signal and down converts this
signal to a desired transmission or broadcast frequency. The image
rejection provided by the single sideband mixers in combination with
simple filtering provide sufficient desired signal isolation, such as on
the order of 40 dB, thereby relax the linearity requirements of
amplifiers utilized in the frequency translation system. A preferred
embodiment of the present invention disposes all or substantially all the
frequency translation circuit elements on a single substrate.