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Start-up circuit for reference voltage generation circuit

A technology of reference voltage and generating circuit, which is applied in the direction of adjusting electrical variables, instruments, control/regulation systems, etc., can solve problems such as large spaces, and achieve the effect of reducing current consumption and stabilizing start-up

Active Publication Date: 2012-02-29
TESSERA ADVANCED TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although a resistor can be used to reduce the dependence on the supply voltage VDD, this approach is not desirable due to the relatively large space it may require compared to a transistor

Method used

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  • Start-up circuit for reference voltage generation circuit
  • Start-up circuit for reference voltage generation circuit
  • Start-up circuit for reference voltage generation circuit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0020] example figure 2 and image 3 is a circuit diagram of the starting circuit 40 and the starting circuit 60 according to an embodiment of the present invention. example figure 2 and image 3 The start-up circuit 40 and the start-up circuit 60 and the reference voltage generation circuit 12 are shown.

[0021] The reference voltage generation circuit 12 can generate a reference voltage having a constant level regardless of external influences. The reference voltage generating circuit 12 may be a bandgap reference (BGR) circuit, which may generate a constant voltage of approximately 1.1 volts, which may be equal to a silicon bandgap voltage. The reference power generation circuit 12 may use an operational amplifier to respond to the external environment to reduce the voltage difference between two paths in which different currents flow.

[0022] According to an embodiment of the present invention, the start-up circuit may include a start-up unit 42 , a reference curr...

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PUM

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Abstract

Embodiments relate to a start-up circuit for a reference voltage generation circuit. According to embodiments, a start-up circuit may include a start-up start unit allowing current to flow in the reference voltage generation circuit to initiate a start-up process in response to a start-up start signal, a reference current generation unit decreasing a variable voltage depending on whether the reference voltage generation circuit is started up and generating start-up reference current corresponding to the variable voltage, and a start-up controller detecting current flowing in the reference voltage generation circuit, comparing the detected result with the start-up reference current, and outputting the compared result as a start-up start signal. Current consumption may be decreased after start-up. A BRG circuit may be stably started up. If a high supply voltage is used, current consumption may decrease, and if a low supply voltage is used, a BGR circuit may be stably started up.

Description

[0001] This application claims priority from Korean Patent Application No. 10-2007-0136467 (filed on December 24, 2007) based on 35 U.S.C 119, the entire contents of which are hereby incorporated by reference. technical field [0002] The present invention relates to a reference voltage generation circuit for generating a voltage having a constant level, such as a bandgap voltage, and more particularly, to a reference voltage generation circuit for starting a reference voltage generation circuit Starting circuit (starting-up circuit). Background technique [0003] Band gap reference (BGR) (band gap reference) circuits (or reference voltage generating circuits) can be used in the design of semiconductor circuits, and more specifically, can provide a constant voltage (reference voltage). The reference voltage may be about 1.1V, which is close to the difference in bandgap voltage of single crystalline silicon. In semiconductor processing, the operating temperature and applied ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05F3/16G05F3/08
CPCG05F3/30G11C5/14
Inventor 张炳琸
Owner TESSERA ADVANCED TECH