| 摘要 |
An arrangement for receiving both TV and FM broadcast signals, particularly suited for multi-media applications. In the arrangement, a standard TV tuner (TUN) effects a first frequency conversion of an FM broadcast signal. A combination of a mixer (MP2) and an oscillator (VCO) effects a second frequency conversion of the FM broadcast signal. In order to keep the arrangement relatively simple, the oscillator (VCO) is included in a phase-lock loop (PLL), which is used for synchronous detection of a TV intermediate frequency signal. The phase-lock loop (PLL) includes a switch (SW) for deactivating the phase-lock loop (PLL) in the case of FM broadcast signal reception, such that the oscillator (VCO) is effectively free running. |
