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Output amplifier circuit, output circuit, data driver and display device

A technology of amplifying circuits and circuits, applied in the direction of coupling substation interface circuits, instruments, static indicators, etc., can solve the problems of output delay, noise, etc.

Active Publication Date: 2013-10-30
RENESAS ELECTRONICS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0036] Therefore, when the differential pair is connected to the output stage (when the switches 41, 43, 51, 53, 45, 46, 55, 56 are turned on) during the driving period after the predetermined period ends, noise is generated at the output, or output delay occurs

Method used

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  • Output amplifier circuit, output circuit, data driver and display device
  • Output amplifier circuit, output circuit, data driver and display device
  • Output amplifier circuit, output circuit, data driver and display device

Examples

Experimental program
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Effect test

Embodiment 1

[0100] figure 1 is a diagram showing the configuration of an example of an output amplifier circuit according to the present invention. refer to figure 1 , in this example, with:

[0101] Differential stage 100;

[0102] 1st output stage 110;

[0103] 2nd output stage 120;

[0104] Switches SW11 and SW12 are respectively connected between the first and second outputs 4 and 6 of the differential stage 100 and the first and second input terminals 5 and 7 of the second output stage 120;

[0105] a switch SW10 connected between the output node 2 of the first output stage 110 and the output node 3 of the second output stage 120; and

[0106] Control signal generating circuit 500 .

[0107] Also, the differential stage 110 includes at least a differential pair and a load circuit. And in an output amplifier circuit with an intermediate stage, the differential stage 100 also includes the intermediate stage.

[0108] The output node 2 of the first output stage 110 is connecte...

Embodiment 2

[0118] figure 2 (A) means figure 1A diagram of an example of a specific structure of the first and second output stages 110 and 120 of the . The first output stage 110 has: a pMOS transistor M1, the source of which is connected to the first power supply terminal (VDD) supplying the power supply voltage VDD, the gate connected to the first output 4 of the differential stage 100, and the drain connected to the output node 2; The source of the nMOS transistor M2 is connected to the second power supply terminal (VSS) that supplies the power supply voltage VSS, the gate is connected to the second output 6 of the differential stage 100 , and the drain is connected to the output node 2 . The second output stage 120 includes: a pMOS transistor M3 whose source is connected to the first power supply terminal, whose gate is connected to the first output 4 of the differential stage 100 via the switch SW11, and whose drain is connected to the output node 3; and an nMOS transistor M4, T...

Embodiment 3

[0129] image 3 (A) means figure 1 Figures of other examples of specific structures of the first and second output stages 110 and 120 of . refer to image 3 (A), this embodiment is composed of pMOS transistor M2C figure 2 The nMOS transistor M2 of the first output stage of (A), and the second output stage nMOS transistor M4 is constituted by the pMOS transistor M4C, between the gate 7 and the source (the output node 3 of the second output stage 120 ) of the pMOS transistor M4C Interconnect switch SW14C. Furthermore, in this embodiment, the structure of the differential stage 100 is such that when the voltage of the input voltage Vin changes, the first output 4 acts in a direction opposite to the voltage change of the input voltage Vin, and the second output of the differential stage 100 6 acts in the same direction as the voltage change of the input voltage Vin. The switching of other structures and switches is the same as the above-mentioned embodiment. In this embodi...

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PUM

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Abstract

Disclosed is an output amplifier circuit including a differential stage, a first output stage that receives outputs of the differential stage, and a second output stage having an output thereof electrically connected to a load. The differential stage receives an input signal at a non-inverting input thereof. In the first connection configuration, an output of the first output stage is electrically disconnected from the output of the second output stage, outputs of the differential stage are electrically disconnected from inputs of the second output stage, and a second input of the differential stage is electrically connected to the output of the first output stage. In the second connection configuration, the output of the first output stage is electrically connected to the output of the second output stage, and the outputs of the differential stage is electrically connected to the inputs of the second output stage.

Description

technical field [0001] The invention relates to an output amplifier circuit and a data driver of a display device using the circuit. Background technique [0002] Recently, liquid crystal display devices are in increasing demand as large-screen liquid crystal televisions in addition to mobile phones (mobile-phones, cell-phones), notebook PCs, and monitors. These liquid crystal display devices use active matrix drive type liquid crystal display devices that can perform high-definition display. First refer to Figure 14 A typical structure of an active-matrix liquid crystal display device will be briefly described. also, Figure 14 In , the main structure connected to one pixel of the liquid crystal display is shown by an equivalent circuit. [0003] In general, the display unit 960 of an active matrix drive type liquid crystal display device has a structure in which two substrates, a semiconductor substrate and an opposing substrate, are opposed to each other, and liquid cr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04M1/76G02F1/133G09G3/20
CPCG09G2310/0291G09G3/3614G09G3/3688
Inventor 土弘
Owner RENESAS ELECTRONICS CORP
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