RF converter having multiple AV/S terminals
First Claim
1. An RF converter having multiple AV/S terminals comprising:
- an RF modulator having a video input (V), an audioinput (A), one RF output and a power pin, wherein the RF output connects to an ANT terminal of a TV;
an S to AV signal converter unit connected to the video input of the RF modulator to convert the S-signal to the V-signal; and
multiple switches connected to the corresponding AV/S terminals, wherein an V pin of the each AV terminal connects to the video input of the RF modulator and a A pin of the each AV terminal connects to the audio input of the RF modulator and an S terminal having a Y pin and a C pin connects to the S to AV signal converter unit to convert an S-signal to a V-signal.
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Accused Products
Abstract
The present invention has multiple AV/S terminals, an RF modulator, a S/AV signal converter and multiple switches. The switches connect the AV/S terminals with the RF outputs to allow the AV/S signal from the special AV/S terminal input into the RF modulator to be converted to an RF-signal input to the ANT terminal of the TV. Besides, the present invention further has an ANT input with an electronic switch and a detecting unit having a driver, which decides whether the electronic switch turns on. If the detecting unit detects no AV-signal or S-signal input from the AV/S terminals, the detecting unit first cuts off the power to the RF modulator and then makes the electronic switch turn on. The RF-signal from the ANT input is output to the RF output.
29 Citations
5 Claims
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1. An RF converter having multiple AV/S terminals comprising:
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an RF modulator having a video input (V), an audioinput (A), one RF output and a power pin, wherein the RF output connects to an ANT terminal of a TV;
an S to AV signal converter unit connected to the video input of the RF modulator to convert the S-signal to the V-signal; and
multiple switches connected to the corresponding AV/S terminals, wherein an V pin of the each AV terminal connects to the video input of the RF modulator and a A pin of the each AV terminal connects to the audio input of the RF modulator and an S terminal having a Y pin and a C pin connects to the S to AV signal converter unit to convert an S-signal to a V-signal. - View Dependent Claims (2, 3, 4, 5)
at least three video signal amplifiers connected to the V pins of the AV terminals and the Y pins and the C pins of the S terminals to amplify the video signal from the A pins, the Y pins and the C pins, wherein outputs of the video signal amplifiers connected to the S terminal connect to the S to AV signal converting unit;
at least two audio signal amplifiers connected to the V pins of the AV terminals to amplify the audio signal from the A pins of the AV terminals;
at least three switching impedance units connected to outputs of the video and audio signal amplifiers with the video input and the audio input of the RF modulator.
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4. The RF converter as claimed in claim 2, wherein the RF converter further comprises a detecting unit, an ANT input and an electronic switch connected between the ANT input with the RF output, wherein the detecting unit connects among a power circuit supplying power to the power pin of the RF modulator, the power pin, the transistor and the ANT input has:
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a first transistor connected to the transistor;
a second transistor connected to the first transistor; and
a driver connected the first transistor with the electronic switch of the ANT output to decide weather the electronic switch turns on;
whereinaccording to whether the transistor turns on decides the driver to allow the electronic switch to turn on, that is the RF-signal from the ANT input is directly output to the RF output of the RF modulator.
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5. The RF converter as claimed in claim 1, wherein the RF converter further comprises multiple priority switches respectively connecting the grounds of the S terminals with the V pins of the AV terminals, wherein each priority switch ensures that inputting the S-signal from the S terminal input to the RF modulator has priority over the V-signal in the same AV/S terminal.
Specification