Operational amplifier circuit and display device having operational amplifier circuit
An operational amplifier circuit and operational amplifier technology, which is applied to parts, amplifiers, and amplifier combinations of amplifiers, can solve problems such as voltage overshoot, and achieve the effect of avoiding overshoot
Active Publication Date: 2022-07-01
FITIPOWER INTEGRATED TECH INC
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Problems solved by technology
When the internal current recovery capability of the output operational amplifier circuit is insufficient, the phenomenon of voltage overshoot (overshoot) will occur when the load terminal is quickly charged and discharged.
Method used
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Embodiment Construction
[0080] In order to make those skilled in the art better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only Embodiments are part of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.
[0081] In the description of the embodiments of the present invention, it should be noted that, unless otherwise expressly specified and limited, the term "connection" should be understood in a broad sense, for example, it may be a fixed connection, a detachable connection, or an integral connection ; It can be a mechanical connection, an electri...
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An operational amplifier circuit includes a pre-operational amplifier module, an output operational amplifier module and an output module. The pre-operational amplifier module is configured to receive a first input voltage and a second input voltage, and output a driving current according to the first input voltage and the second input voltage. The output operational amplifier module outputs a dynamic bias voltage according to the driving current. The output module is used for generating an output voltage according to the dynamic bias voltage. The output operational amplifier module also receives control voltages and detects dynamic bias voltages. When the dynamic bias voltage is lower than the predetermined voltage, the dynamic bias voltage is pulled up according to the control voltage; when the dynamic bias voltage is higher than the predetermined voltage, the dynamic bias voltage is pulled down according to the control voltage. The magnitude of the control voltage is proportional to the pull-up speed and pull-down speed of the dynamic bias voltage. The present invention also provides a display device with an operational amplifier circuit.
Description
technical field [0001] The present invention relates to an operational amplifier circuit for suppressing voltage overshoot and a display device having the operational amplifier circuit. Background technique [0002] In the prior art, a display device includes a plurality of scan lines parallel to each other and a plurality of data lines parallel to each other. The orthogonal arrangement of the scan lines and the data lines defines a plurality of pixel units arranged in a matrix. The gate driver provides scan signals to the plurality of scan lines, and the data driver provides data signals to the plurality of data lines. Among them, the data driver usually includes an output operational amplifier circuit, which can realize fast charging and discharging of the load end. When the internal current recovery capability of the output operational amplifier circuit is insufficient, the phenomenon of voltage overshoot (overshoot) will occur when the load terminal is rapidly charged ...
Claims
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IPC IPC(8): G05F1/46G05F1/571G09G3/20
CPCG05F1/461G05F1/571G09G3/20G09G2310/0294H03F3/45192H03F3/45246H03F2203/45322H03F2203/45344H03F2203/45356H03F3/45475H03F3/303H03F2203/30015G09G3/3696G09G2310/0291G09G3/3291G09G3/3685G09G5/003H03F3/68H03F3/45179H03F1/301H03F2203/45352H03F2203/45358
Inventor 林崑宗
Owner FITIPOWER INTEGRATED TECH INC