Conversion circuit, tuner and demodulator

摘要

In-phase and quadrature baseband analog signals are supplied from a tuner front end to respective sample and hold circuits which sample their input signals at different times. The resulting samples are converted by a single ADC and the I or Q digital samples are supplied to an interpolator. The interpolator performs interpolation on, for example, the Q digital samples to obtain further samples at the same sampling points as the I signal. The resulting samples are supplied to a digital demodulator.