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A Method of Digitally Controlling the Output Voltage of Low-Voltage Devices

A technology for output voltage and low-voltage devices, which is applied in the field of controlling the output voltage of low-voltage devices, and can solve problems such as unfavorable chip space design and increased chip layout size

Active Publication Date: 2022-01-25
晟合微电子(肇庆)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Increase the analog control circuit for adjustment, it can be seen that more analog circuit modules need to be added, therefore, the layout size of the entire chip needs to be increased, which is not good for the space design of the chip

Method used

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  • A Method of Digitally Controlling the Output Voltage of Low-Voltage Devices
  • A Method of Digitally Controlling the Output Voltage of Low-Voltage Devices
  • A Method of Digitally Controlling the Output Voltage of Low-Voltage Devices

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Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0032] Implementation mode one: if image 3 In the power system shown, the main body function module of the low-voltage device is a BGR module, the output of the main body function module is connected to the positive input terminal of the operational amplifier module, the output of the decoder module is connected to the negative input terminal of the operational amplifier module, and the digital adjustment variable Δtrim is stored. The trimming register [N:1] and the trimming compensation register [N:1] that registers the digital compensation adjustment variable Δtrim_offset are connected to the decoder module after being converted by the L / S[N:1] module, and the output of the operational amplifier module is connected in series in sequence The resistor R_Up, the trimming resistor, and the resistor R_DOWN are grounded, and the adjustable end of the trimming resistor (Trim Resistor) is connected to the input end of the decoder module.

[0033] The output voltage Vout of the oper...

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Abstract

The invention relates to a method for digitally controlling the output voltage of a low-voltage device. The low-voltage device has a body function module, a trimming circuit module, and an operational amplification module. The body function module and the trimming circuit module are respectively connected to the input terminal of the operational amplification module. To perform calculation, the method is as follows: adding a digital adjustment variable Δtrim to the trimming circuit module. Further, a digital compensation adjustment variable Δtrim_offset is also added to the trimming circuit module. Adding a digital adjustment variable to the low-voltage device for adjustment, in the case of realizing the function of trimming the output voltage of the low-voltage device, does not need to add more analog control circuits, so the layout size of the chip can still be in a relatively small Realized in a small size space.

Description

technical field [0001] The invention relates to a method for controlling the output voltage of a low-voltage device, in particular to a method for digitally controlling the output voltage of a low-voltage device. Background technique [0002] The data, storage and MIPI of the driver chip (driver IC) (Mobile Industry Processor Interface referred to as MIPI) are realized by using a low-voltage device and a regulator suitable for the low-voltage device, such as TSMC's 40nm low-voltage The drive voltage for the device is 1.1V, therefore, a low-voltage regulator that can generate the 1.1V drive voltage for the chip is required. [0003] Previous mobile products with a resolution of In the case of , the number of logic gates is relatively small, so no separate low voltage level control is required. However, today's mobile products require display resolutions ranging from And to realize the image compensation function, etc., therefore, the number of logic gates gradually incre...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05F1/56
CPCG05F1/56
Inventor 郑丞弼施伟
Owner 晟合微电子(肇庆)有限公司