Video output filter driver circuit structure
A driver circuit, video output technology, applied in logic circuits, electrical components, pulse technology and other directions, can solve the problem of output tube capability, abnormal chip quiescent current ICC, small and other problems, to achieve a wide range of applications, improve stability, Improve the effect of ICC
Active Publication Date: 2016-06-29
CRM ICBG (WUXI) CO LTD
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Problems solved by technology
[0003] The video filter drive structure is relatively simple, but there are certain defects in this structure, that is, when the video filter signal is determined, the output current of the video filter drive is too large or too small due to the consistency deviation of the process or signal transmission, which makes the static current of the whole chip ICC is abnormal and does not meet the design specifications
It is not obvious to improve the ICC performance by adjusting the tube area of the video driver output port to compensate. Secondly, the output tube area is too small will also affect the output tube capability.
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[0016] In order to understand the technical aspects of the present invention more clearly, the following examples are given in detail.
[0017] see figure 2 Shown is a circuit diagram of the video output filter driver circuit structure of the present invention.
[0018] In one embodiment, the video output filter driver circuit structure includes a comparison circuit, an output terminal circuit and a negative feedback circuit, the video signal input terminal is connected to the output terminal circuit through the comparison circuit, and the negative feedback circuit The circuit is connected to the output circuit. In this circuit structure, the comparison circuit includes a first signal output terminal S1 and a second signal output terminal S2; the output terminal circuit includes a first P-type MOS field effect transistor P46 and a first N-type MOS field effect transistor N35; the first signal output terminal S1 is connected to the gate of the first P-type MOS field effect t...
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The invention relates to a circuit structure of a video output filter driver, belonging to the technical field of circuit structures. The video output filter driver circuit structure includes a comparison circuit, an output terminal circuit and a negative feedback circuit, the video signal input terminal is connected to the output terminal circuit through the comparison circuit, and the negative feedback circuit is connected to the output terminal. terminal circuit. The video output filter driver adopting the circuit structure can use the negative feedback circuit to balance the output terminal current, thereby effectively improving the quiescent current ICC, and further greatly improving the stability of the video image drive output. Moreover, the circuit structure of the video output filter driver of the present invention is simple in structure, low in cost and wide in application range.
Description
technical field [0001] The present invention relates to the technical field of circuit structure, in particular to the technical field of driver circuit structure, and specifically refers to a video output filter driver circuit structure. Background technique [0002] Such as figure 1 Shown is the circuit structure diagram of the output end of the video filter driver in the prior art. From figure 1 It can be seen that the video filter signal Signal is compared with a reference signal Reg to output two signals S1 and S2, and S1 and S2 respectively control the gates of the upper PMOS transistor and the lower NMOS transistor at the output end of the driver. For a MOS transistor with a channel length of L, the voltage-current relationship of the transistor is: k n is the process transconductance parameter, in the saturation region, Therefore, the current at the output terminal of the video filter driver is the current of the output MOS pair transistors P46 and N35. [00...
Claims
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IPC IPC(8): H03K19/094
Inventor 袁巍杨颖黄立朝陈继辉程学农
Owner CRM ICBG (WUXI) CO LTD