High-gain video signal amplification circuit
A video signal amplification and high-gain technology, which is applied in televisions, electrical components, color TVs, etc., can solve problems such as low gain, large video signal distortion, and poor anti-interference ability, and achieve improved AC impedance, stable gain, and high The effect of completeness
Inactive Publication Date: 2013-12-18
CHENGDU KAIZHI TECH
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Problems solved by technology
[0002] Video signal refers to TV signal, still image signal and visible TV image signal. Video signal can support three standards: NTSC, PAL, SECAM. The purpose of amplifying video signal is to enhance the brightness, chroma and synchronous signal of video. In the field of video There are many trends, one of the more important trends is that the resolution is getting higher and higher. As the video resolution of portable products is increased from VGA to SXGA and higher levels to meet people's needs, the current video signal amplification circuit has a high impact on components. The requirements are high, the gain is low, there is a large distortion after the video signal is amplified, and the anti-interference ability is poor
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[0010] The present invention will be further described below in conjunction with accompanying drawing:
[0011] like figure 1 As shown, the present invention includes a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, and a ninth resistor R9 , the tenth resistor R10, the eleventh resistor R11, the twelfth resistor R12, the thirteenth resistor R13, the fourteenth resistor R14, the fifteenth resistor R15, the sixteenth resistor R16, the seventeenth resistor R17, the tenth Eight resistors R18, first transistor VT1, second transistor VT2, third transistor VT3, fourth transistor VT4, fifth transistor VT5, sixth transistor VT6, seventh transistor VT7, power supply, diode D , the first capacitor C1, the second capacitor C2, the third capacitor C3 and the fourth capacitor C4, the first transistor VT1 and the second transistor VT2 are all PNP type, the third trans...
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The invention discloses a high-gain video signal amplification circuit which comprises a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, an eleventh resistor, a twelfth resistor, a thirteenth resistor, a fourteenth resistor, a fifteenth resistor, a sixteenth resistor, a seventeenth resistor, an eighteenth resistor, a first triode transistor, a second triode transistor, a third triode transistor, a fourth triode transistor, a fifth triode transistor, a sixth triode transistor, a seventh triode transistor, a power supply, a diode, a first capacitor, a second capacitor, a third capacitor and a fourth capacitor. According to the high-gain video signal amplification circuit, alternating-current impedance is increased, gain is increased and stable, and due to the fact that voltage is applied to the base electrode of the fifth triode transistor, severe output distortion is eliminated, interference resistance is improved, and an original video signal is still high in integrity after being amplified.
Description
technical field [0001] The invention relates to a signal amplifying circuit, in particular to a high-gain video signal amplifying circuit. Background technique [0002] Video signal refers to TV signal, still image signal and visible TV image signal. Video signal can support three standards: NTSC, PAL, SECAM. The purpose of amplifying video signal is to enhance the brightness, chroma and synchronous signal of video. In the field of video There are many trends, one of the more important trends is that the resolution is getting higher and higher. As the video resolution of portable products is increased from VGA to SXGA and higher levels to meet people's needs, the current video signal amplification circuit has a high impact on components. The requirements are high, the gain is low, there is a large distortion after the video signal is amplified, and the anti-interference ability is poor. Contents of the invention [0003] The object of the present invention is to provide a...
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Inventor 郭辉罗彬覃树建
Owner CHENGDU KAIZHI TECH