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Built-in digital power circuit

A digital power supply and circuit technology, applied in the direction of adjusting electrical variables, control/regulation systems, instruments, etc., can solve the problems of large area, complex structure, high power consumption, etc., and achieve the effect of low energy consumption, simple structure, and small scale

Active Publication Date: 2012-07-18
BEIJING JINGWEI HIRAIN TECH CO INC
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  • Description
  • Claims
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Problems solved by technology

[0005] In view of this, the purpose of the present invention is to provide a built-in digital power supply circuit to solve the shortcomings of high power consumption, large area and complex structure of the built-in digital power supply circuit in the prior art

Method used

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Embodiment Construction

[0041] For reference and clarity, the abbreviations or abbreviations used hereinafter are summarized as follows:

[0042] NMOS: N-Mental-Oxide-Semiconductor, metal-oxide-semiconductor;

[0043] PMOS: positive channel Metal Oxide Semiconductor, n-type substrate, p-channel, MOS tube that transports current by the flow of holes.

[0044] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0045] refer to figure 2 , shows a schematic diagram of the overall circuit structure of a built-in digital power supply circuit. ...

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Abstract

The invention provides a built-in digital power circuit, which comprises a first mirror current source, a second mirror current source, a third mirror current source, a fourth mirror current source, a first current source, a second current source and a built-in analog power source. Functions of the built-in digital power circuit can be realized by the aid of the mirror current sources. In addition, compared with a circuit in the prior art, the built-in digital power circuit has five branches, and the quantity of devices of the built-in digital power circuit is equal to that of devices of a small-size OPA (operational amplifier) while the area of the built-in digital power circuit is much smaller. Besides, as the quantity of the branches of the circuit is low, the built-in digital power circuit is small in scale, low in energy consumption and simple in structure.

Description

technical field [0001] The invention belongs to the field of integrated circuit design, in particular to a built-in digital power supply circuit. Background technique [0002] In the field of automotive electronics and industrial electronics, because it often involves high and fluctuating power supply voltage applications, in order to ensure the safety of the chip in the circuit, the chip is required to work normally within all possible power supply voltage ranges. For this reason, the mixed-signal integrated circuit design scheme with high and low voltage technology is often used, which is characterized by the use of high voltage devices to resist high external power supply voltage, and the use of low voltage devices for signal processing and digital control. For digital circuits of low-voltage devices, it is often necessary to design a corresponding internal digital power supply circuit to avoid breakdown of low-voltage devices. [0003] The built-in digital power supply ...

Claims

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Application Information

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IPC IPC(8): G05F3/26
Inventor 贾晓伟邓龙利王帅旗
Owner BEIJING JINGWEI HIRAIN TECH CO INC
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