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reference voltage generator

A reference voltage and generating device technology, applied in the direction of adjusting electrical variables, control/regulating systems, instruments, etc., can solve problems such as reference voltage level deviation

Inactive Publication Date: 2011-11-30
YIELD MICROELECTRONICS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, it is not a simple matter to keep the reference voltage level fixed, because the reference voltage level will actually be shifted by factors such as ambient temperature, manufacturing process, power supply voltage level, etc.

Method used

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Experimental program
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Embodiment Construction

[0028] Please refer to image 3 , is a schematic circuit diagram of a reference voltage generating device according to the present invention. As shown in the figure, the reference voltage device 20 of the present invention includes a 0 The current generating circuit 22, an active load circuit 24 coupled to the current generating circuit 22 to receive the current I 0 And output a reference voltage Vref, and a reference voltage level supply circuit 26 coupled to the active load circuit 24, and the reference voltage level supply circuit 26 has a storage element, such as an electronically erasable programmable read-only memory (EEPROM), After the wafer is produced, the reference voltage control level data is stored in the storage element, so the reference voltage level supply circuit 26 can provide at least one first reference voltage control level (S1...Sn) and A second reference voltage control level ( F1 . . . Fn) is referenced by the active load circuit 24 .

[0029] The cu...

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PUM

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Abstract

The present invention is a reference voltage generating device, comprising a current generating circuit to generate a current, an active load circuit receiving the current and outputting a reference voltage, and the active load circuit includes at least a first reference voltage control circuit coupled with a phase The second reference voltage control circuit is used to reduce or increase the level of the reference voltage, and a reference voltage level supply circuit is used to provide at least two reference voltage control levels for the first and second reference voltage control circuits according to the reference Voltage control level, adjust the reference voltage level to maintain a fixed state.

Description

technical field [0001] The present invention relates to a reference voltage generating device, in particular to a reference voltage generating device which can adjust the level of the reference voltage to a fixed state. Background technique [0002] Whether it is for analog circuit or digital circuit design, it is very important to have a stable reference voltage. However, it is not a simple matter to keep the reference voltage level fixed, because the reference voltage level will actually be shifted by factors such as ambient temperature, manufacturing process, and power supply voltage level. [0003] Please refer to figure 1 , is a schematic diagram of a conventional reference voltage generating device. As shown in the figure, the conventional reference voltage generating device 10 is a low-power reference voltage generating device using transistors operating in a weak inversion region, and includes a current generating circuit 12 and an active load circuit 14 . And, th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05F1/46G05F1/56G05F3/26
Inventor 林信章王义成吴政颖
Owner YIELD MICROELECTRONICS CORP