Differential class AB amplifier circuit, driver circuit and display device

A driver circuit, amplifier circuit technology, applied in the direction of differential amplifiers, amplifiers, DC coupled DC amplifiers, etc., can solve the problems of increased number, increased power consumption, increased phase compensation circuit area, etc., to achieve the effect of improving phase margin
CN101951233AInactive Publication Date: 2011-01-19RENESAS ELECTRONICS CORP
1 Cites 9 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
RENESAS ELECTRONICS CORP
Publication Date
2011-01-19
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention relates to a differential class AB amplifier circuit, a driver circuit and a display device. The driver circuit of the present invention comprises a differential class AB amplifier circuit which comprises: a first differential amplifier circuit configured to amplify differential input signals and output a first signal in a first voltage range; a second differential amplifier circuit configured to amplify the differential input signals and output a second signal in a second voltage range; and a class AB output circuit configured to input the first and the second signals as differential signals and amplify the differential signals, wherein the class AB output circuit comprises: a phase compensating capacitance section; and a current buffer circuit configured to control a current flowing through the phase compensating capacitance section.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The present invention relates to a differential class AB amplifier circuit, and a driver circuit and a display device provided with the differential class AB amplifier circuit. Background technique

[0002] In order to simultaneously drive a large number of capacitive loads, a display device includes a plurality of differential class AB amplifier circuits as driver circuits. For example, each of these driver circuits voltage-drives data lines in each column of an LCD (Liquid Crystal Display) panel and outputs analog signals corresponding to display data. Therefore, it is required to enable so-called rail-to-rail input / output over the entire range of the power supply voltage, and a voltage follower connected to a differential class AB amplifier has been used for this purpose. In addition, these driver circuits require low power consumption.

[0003] Simultaneously, liquid crystal panels have increased in size and resulting parasitic capacitances on da...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More