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发明授权
CN101789789B 一种参考电压产生电路 有权 转让

一种参考电压产生电路
摘要：
本发明提供一种参考电压产生电路。该参考电压产生电路包括一第一运算放大器及一第二运算放大器，分别产生一正参考电压与一负参考电压至一模拟至数字转换器。首先，耦接一第一电路于该第一运算放大器的输出端与该第二运算放大器的正输入端之间，其中该第一电路将该第一运算放大器产生的该正参考电压的电压变动输入该第二运算放大器的正输入端，以维持该第二运算放大器所产生的该负参考电压的稳定。接着，耦接一第二电路于该第二运算放大器的输出端与该第一运算放大器的正输入端之间，其中该第二电路将该第二运算放大器所产生的该负参考电压的电压变动输入该第一运算放大器的正输入端，从而维持该第一运算放大器所产生的该正参考电压的稳定。
摘要（英）：

The invention provides a generating circuit from reference voltage. The generating circuit comprises a first operational amplifier and a second operational amplifier, respectively generating a positive reference voltage and a negative reference voltage that are conducted to a simulated digital quantizer. First, coupling the first circuit between the output end of the first operational amplifier and the positive input end of the second operational amplifier. The first circuit can conduct the variation of the positive reference voltage produced by the first circuit to the positive input end of the second operational amplifier so that the stability of the negative reference voltage produced by the second operational amplifier can be maintained. Then, coupling the second circuit between the output end of the second operational amplifier and the positive input end of the first operational amplifier. The second circuit can conduct the variation of the positive reference voltage produced by the second circuit to the positive input end of the first operational amplifier so that the stability of the negative reference voltage produced by the first operational amplifier can be maintained.

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