TH6420B - Medium frequency parallel to the shared sawtooth filter - Google Patents

Abstract

This invention matches a low-noise TV signal generation system wherein the image medium-frequency (IF) signal and audio medium-frequency (IF) signal are filtered by a combined sawtooth filter with no The need for an anti-surface reflectance (SAW) waveform device increases for IF sound generation. steep NYQUIST

Claims (6)

1. In the TV receiver there is a medium frequency signal (IF) source, which consists of Image vectors and sound vectors change along with video and audio information respectively. And the audio carrier will have a separate frequency set between them. Signal generating devices include The first IF interval filter is for filtering the IF signal to produce the first filter portion of the IF signal. The first pass filter has a pass-through characteristic that covers the frequency of the sound and image carriers and where the height at Adjacent frequencies only above and below the image carrier frequency. Second IF filter for filtering the first framed portion of the IF signal to produce the second filtered portion of the first filtered portion of the IF signal. It is characterized by the implication where the height of the adjacent frequency above and below the frequency of the image carrier is not the same. Visualization section It consists of an image detector with an input connected to the output of a second IF filter for the generation of a captured image signal from a second filter IF signal. Sound generation section Which consists of Sound detector It has an input to the output of the first IF interval filter for generating a signal between the audited sound carriers from the first filtered portion of the IF signal that includes the audio carrier and the image carrier. 2. In the TV receiver there is a medium frequency signal (IF) source consisting of The video and audio carriers are changed together with the video and audio data respectively. The image and sound carriers have a fixed frequency separation between them. The signaling device contains an IF first pass filter for filtering an IF signal to create a first filter. To create the first filter portion of the IF signal, the first pass filter has a characteristic that indicates its frequency. Where the heights at adjacent frequencies above and below the image carrier frequency are equal, second IF filter for filtering the first filtered portion of the IF signal to produce the second filtered portion of the IF signal. The second will generate a trapping drop of the selected frequency based on the slope of the pass area of the first IF pass filter in such a way that the height of the adjacent frequency above. And below the frequency of the image carrier is not the same. Visualization section Which consists of Image detector It has an input to the output of a second IF filter for reproduction of the video signal detected from the IF signal, the second filtered part, and the noise generation. Which includes a sound detector It has an input to the output of the first IF interval pass filter for generating a signal between the detected audio carriers from the first filtered portion of the IF signal. 3. In the TV receiver there is a medium frequency signal (IF) source consisting of The video and audio carriers are changed together with the video and audio data respectively. The image and sound carriers have a fixed frequency separation between them. Signal generating devices include The first IF interval filter contains a sawtooth filter to filter the IF signal to create the first division of the IF signal. At adjacent frequencies above and below the image carrier frequencies are the same. The second IF filter consists of A trap filter for filtering the first filter of an IF signal to form the second filter of an IF signal. Where the height of adjacent frequencies above and below the image carrier frequencies are not equal. Visualization section Which consists of Image detector It has an input to the output of a second IF filter for reproduction of the video signal detected from the IF signal, the second filtered part, and the noise generation. Which includes a sound detector It has an input to the output of the first IF interval pass filter for generating a signal between the audio carriers detected from the first filtered portion of the IF signal. 4.In the TV receiver there is a medium frequency signal (IF) source which consists of The video and audio carriers are changed together with the video and audio data respectively. The image and sound carriers have a fixed frequency separation between them. Signal generating devices include The first IF interval filter is for filtering the IF signal to create the first filter portion of the IF signal. At adjacent frequencies above and below the image carrier frequencies are the same, second-order IF filter for filtering the first filtered portion of the IF signal to produce the second-order filtered portion of the first-filtered portion of the IF signal. The second filter adjusts the visual IF frequency lower height for the NYQUIST slope formation not generated by the first IF filter so that the adjacent frequency heights above and below the image carrier frequencies are not equal. Visualization section Which consists of a photo detector It has an input to the output of a second IF filter for reproduction of the video signal detected from the IF signal, the second filtered part, and the noise generation. Which includes a sound detector It has an input to the output of the first IF interval pass filter for generating a signal between the audio carriers detected from the first filtered portion of the IF signal. 5. TV receivers have a medium frequency signal (IF) source, which includes The image carrier and the audio carrier change along with the video and audio data respectively. The image carrier and sound carrier have a pre-set frequency separation during them. A device where the visual IF signal and the audio IF signal are filtered by a common filter. Go with frequency response. This smooths through the upper and lower protrusions of the image carrier frequency and the IF signal. The image is further filtered by a second filter. For modulation of the height, low, frequency, IF signal, NYQUIST slope, not generated by the first filter, with the audio carrier that does not follow the NYQUIST slope drop of the second filter. 6. In the TV receiver there is a medium frequency signal source (IF) consisting of a picture carrier. And the sound carrier that changes along with the video and audio data respectively, the image carrier and the sound carrier have a fixed frequency separation between them. Signal generating devices include The first IF interval filter is for filtering the IF signal to produce the first filtered portion of the IF signal.The first IF interval filter is a sawtooth filter, the second IF filter for the first filtered portion. Of the IF signal to generate the second filtered portion of the first filtered portion of the IF signal, the second IF filter adjusts the height of the first filtered portion of the picture IF signal to produce the non-NYQUIST slope. Created by 1st IF filter, visualization section with image detectors with input to output of second IF filter for generating captured image from second filter of IF signal and output segment. Generate sound contains a sound detector. It has an input to the output of the first IF interval pass filter for generating a signal between the audio carriers detected from the first filtered portion of the IF signal.