TH6384B - FM stereo radio in a TV tuner - Google Patents

Abstract

television receiver Includes a single tuner for tuning TV channels. and the FM station used to spread out The tuner was made work with a given rate of growth which is adjusted in the FM receiving mode The tuner acts as a converter sector. Part one of the multiplicative FM receiver, where the mixer of the FM radio integrated circuit Acting as a second converter, such placement will operate at the first IF frequencies specific to and not specific to the FM receivers, which can be used to receive broadcasts from the National Broadcasting Service (NWS). Automatically at one of the seven preset frequencies of the NWS operating in the listener's area, the receiver will display on the screen the number of FM system channels being tuned.

Claims (8)

1. TV receiver With a tuner way For working in the first mod To receive RF signals Of the TV tuner way Will select a specific TV RF signal from a number of TV RF signal in Response to control signals The aforementioned tuner method also works in the second mod as a converter First sector frequency For FM radio receivers used to spread out with exponential conversion. To receive the R7 signal of the FM radio system used to spread Loud sound of tuner It selects the RF signal of a specific FM radio system that it uses to propagate from the RF signal of a broadcast FM radio. One of the responses to such control signals and to the RF modulation of the specific FM radio system used to propagate it. To the first intermediate frequency A control path for producing such a control signal is to allow the tuner to select one signal from the said TV's RF signal and the FM radio RF signal. Only used for such spread The second frequency conversion part of the multiply-converted FM radio receiver has such multiplication. Will receive the FM radio signal at It is used to propagate the said medium at one such medium and to convert the radio signal to the FM system used to spread it at high speed. This first intermediate frequency is the second intermediate frequency. The second such middle frequency Will be anything other than The medium frequencies of the sound between the television carriers and the path for the demodulation of the FM radio signal. M. used to spread the said second frequency. 2. Television receiver of claim 1, where the second such intermediate frequency will be 10.7 MHz. 3. Television receiver of claim 2, where the frequency converter, the second part Is a component of an integrated circuit of FM radio receiver 4. TV receiver of claim 1, where during the said second operating mode TV receiver will Produce video signal Which when displayed on the monitor will produce consistent colors 5. TV receiver of claim 4, where such a consistent color will be black. 6. The TV receiver of claim 1, where during the preset period of the second operating module, the said television receiver produces a picture signal which, when Displayed on the screen will give rise to characters that identify the system radio station. Tuned FM 7. TV receiver of claim 1 where during the preset period of the second operating module, the said television receiver produces a picture signal which, when Is displayed on the screen. This will cause a radio station character. Tuned FM system And during the rest of the mod The second such work Will produce a signal which, when displayed on the monitor Will cause a consistent display of the blanking results 8. A television receiver consists of a tuner path. For working in the first mod To receive the signal RF-- of the television. Will select a specific TV RF signal from a number of TV RF signal in Response to control signals And converts the aforementioned RF signal into a television Intermediate Frequency (IF) signal. Modulation method for such television's IF signal to produce the television's audio signal. A control path for producing such a control signal to allow that tuner path to select that particular RF signal. Way of such tuner Also working on the second mod as a converter The first frequency for broadcast-based FM stereo tuners with exponential conversion. FM stereo system signal Is the first intermediate frequency The second frequency conversion part of the multiply-converted FM radio receiver has such multiplication. Will receive the FM stereo signal Mentioned at the aforementioned intermediate frequency And transducer The aforementioned FM stereo system is the second medium frequency. The path for the sound demodulation of the FM signal system Such trio At the aforementioned second intermediate frequency and to produce a modulated FM stereo signal and alternative means for amplification and production of one from TV sound signal And the sound signal of the FM system Trio with such demodulation (8 claims, 3 pages, 6 photos)