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Radio frequency (RF) modulator with narrow bandpass filter
Radio frequency (RF) modulator with narrow bandpass filter
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机译:带有窄带通滤波器的射频(RF)调制器
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摘要
Disclosed herein is RF modulator with a narrow bandpass filter. The RF modulator for modulating video and audio signals into RF signals corresponding to a frequency band of a predetermined channel includes an oscillation unit for generating a predetermined RF signal suitable for the frequency band of the predetermined channel; a mixer for modulating the video and audio signals using the RF signal generated from the oscillation unit; and a narrow bandpass filter for receiving an RF-modulated signal from the mixer, and passing only a signal of the frequency band of the predetermined channel from among the RF-modulated signal. Therefore, the RF modulator can remove or block unnecessary components such as lower side band and harmonic-frequency signals generated after video and audio signals have been RF-modulated, such that it can prevent interference between channels from being generated, resulting in the creation of more excellent video and audio signals.
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