Conversion circuit, tuner and demodulator

摘要

In-phase and quadrature baseband analog signals are supplied from a tuner front end (1-7) to respective sample and hold circuits (10, 11) which sample their input signals at different times. The resulting samples are converted by a single ADC (13) and the I or Q digital samples are supplied to an interpolator (20-26). The interpolator performs interpolation on (in this case) 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 (28). <IMAGE>