Voltage reference circuit

A voltage reference and circuit technology, applied in the field of programmable voltage reference circuits, can solve problems such as consumption, large chip area, and large DC power consumption, and achieve the effects of simple implementation, low static power consumption, and low DC power consumption
CN100428102CActive Publication Date: 2008-10-22SEMICON MFG INT (SHANGHAI) CORP +1
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
SEMICON MFG INT (SHANGHAI) CORP
Publication Date
2008-10-22

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Abstract

The present invention discloses a programmable reference voltage circuit. The voltage reference circuit provided by said invention can be implemented by using EEPROM unit. It utilizes the characteristics that the charge stored in its floating gate zone can influence its threshold voltage, and said invented programmable reference voltage circuit has the advantages of low DC power consumption and programmable regulated output voltage, etc.
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Description

technical field

[0001] The present invention generally relates to a voltage reference circuit used in a semiconductor integrated device. More particularly, the present invention relates to a programmable voltage reference circuit implemented with EEPROM cells for use in semiconductor integrated devices. Background technique

[0002] Reference voltage generating circuits are required in various semiconductor devices, especially nonvolatile memory devices. In the prior art, a bandgap reference circuit is often used to generate a stable reference voltage. For example, US Patent Nos. 6,570,437, 6,566,850 and 6,563,371 respectively show circuits and methods for generating voltage using bandgap circuits. However, the bandgap circuit itself has a serious disadvantage: the bandgap reference circuit itself usually consumes relatively large DC power consumption. In addition, in order to obtain the required voltage, a voltage divider is also required. These two modules usually need t...

Claims

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