Abstract:
aparelho e método de recepção [problema] o objetivo da presente invenção é manter boas características de recepção enquanto também reduzindo escala de circuito tão pequena quanto possível em um dispositivo receptor para receber uma pluralidade de ondas radiodifundidas de bandas de frequência diferentes. [solução] uma primeira unidade de processamento de alta frequência (320s, 320t) detecta uma primeira onda radiodifundida transmitida usando uma primeira banda de frequência a fim de extrair um primeiro sinal de alta frequência. além disso, uma segunda unidade de processamento de alta frequência (320t, 320s) detecta uma segunda onda radiodifundida transmitida usando uma segunda banda de frequência que é diferente da primeira banda de frequência a fim de extrair um segundo sinal de alta frequência. então, pelo menos um oscilador local (320) gera um sinal de oscilador local usado na primeira unidade de processamento de alta frequência e na segunda unidade de processamento de alta frequência.
Abstract:
A first high frequency processing unit detects a first broadcasting wave transmitted using a first frequency band, and extracts a first high frequency signal. Further, a second high frequency processing unit detects a second broadcasting wave transmitted using a second frequency band different from the first frequency band, and extracts a second high frequency signal. Furthermore, at least one local oscillator generates a local oscillation signal used in the first high frequency processing unit and the second high frequency processing unit.
Abstract:
There are provided a high frequency module and a receiver capable of exhausting an electric field and a magnetic field to the outside of a shield, more closely arranging electronic components inside the shield, and being downsized. The high frequency module has integrated circuits (IC) 112, 113 each incorporating an oscillator including an inductor, and a shield case 114 as a shield for covering the ICs 112, 113, and the shield case 114 as a shield is formed with openings 116A, 116B having a size equal to or more than half the shape size of the ICs 112, 113 in areas opposed to the arrangement positions of the ICs 112, 113.
Abstract:
An intermediate frequency signal is converted into a digital signal by an A/D converting circuit (4). The digital signal is fed to a video carrier reproducing circuit (5) for reproduction by digital processing and a video demodulating circuit (6). The demodulated video signal is outputted from an output terminal (7). The digital signal from an A/D converting circuit (4) is fed to a phase comparator (11), and the phase of the phase comparison output is compared with that of an oscillation signal from a VCO (12). The phase comparison output of the phase comparator (11) is fed to an adder (13). The video carrier component from the video carrier reproducing circuit (5) is subtracted. The result of the subtraction is fed to a low−pass filter (14), and the demodulated audio signal is taken out from an output terminal (15). Receiving means can be thus used commonly to an analog television signal and a digital television signal.