MIPI bias circuit, MIPI module and display device
A bias circuit and bias current technology, applied in the direction of adjusting electrical variables, control/regulation systems, instruments, etc., can solve problems such as the inability to adjust the ratio of the current mirror factor, and achieve the effect of adjustable bias current
Active Publication Date: 2021-11-19
晟合微电子(肇庆)有限公司
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Problems solved by technology
As shown in Figure 1, the bias circuit is usually composed of a trimming circuit 1 composed of variable resistors, a bias amplifier 2, and a current mirror, and the bias current is generated through the current mirror. However, this bias circuit cannot adjust the factor of the current mirror ratio, thereby adjusting the bias current
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[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of this application.
[0028] In the description of the present application, it should be noted that the terms "first", "second", "third" and so on are only used to distinguish descriptions, and should not be understood as indicating or implying relative importance.
[0029] In the description of this application, it should also be noted that, unless otherwise clearly stipulated and limited, the terms "setting" and connection should be understood in a broad sense, for example, it can be a fixed c...
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The application discloses a bias circuit of an MIPI (Mobile Industry Processor Interface), which is connected with a signal amplification module of an MIPI module and comprises a reference current output unit, a current mirror unit, a fine tuning unit and a bias current output unit; the reference current output unit is respectively connected with the current mirror unit and the fine tuning unit, the current mirror unit is connected with the fine tuning unit, the bias current output unit is connected with the current mirror unit, and the fine tuning unit is also connected with an external control source; the reference current output unit is used for outputting a reference current according to an input low-voltage current, the fine tuning unit is used for controlling a mirror image scale factor of the current mirror unit according to a control source, the current mirror unit is used for outputting a bias current according to the mirror image scale factor, and the bias current output unit is used for outputting the bias current to the signal amplification module. According to the invention, the bias current of the MIPI module can be adjusted.
Description
technical field [0001] The present application relates to the field of electronic circuits, in particular to a MIPI bias circuit, a MIPI module and a display device. Background technique [0002] In the physical layer of the MIPI (Mobile Industry Processor Interface, mobile industry processor interface) module, there is usually a bias amplifier 2 that amplifies the signal. Usually, the bias amplifier 2 needs to generate a certain value through a bias circuit. Constant DC current for amplifier operation. As shown in Figure 1, the bias circuit is usually composed of a trimming circuit 1 composed of variable resistors, a bias amplifier 2, and a current mirror, and the bias current is generated through the current mirror. However, this bias circuit cannot adjust the factor of the current mirror ratio to adjust the bias current. Contents of the invention [0003] The embodiment of the present application provides a MIPI bias circuit and MIPI module, so as to adjust the bias c...
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Login to View More IPC IPC(8): G05F3/26
CPCG05F3/26
Inventor 郑丞弼谭力
Owner 晟合微电子(肇庆)有限公司