带隙基准电压发生器

• Format: Patent
• Language: Chinese
• Published: 21.12.2016
• Subjects: CONTROLLING; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; PHYSICS; REGULATING; SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES; TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION; TECHNICAL SUBJECTS COVERED BY FORMER USPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS

种带隙基准电压发生器具有在第节点和第二节点之间的第和第二电流传导路径。第电流传导路径具有与第正向偏置PN结元件串联连接的第电阻元件。抽头通过开关选择性连接到第电阻元件，开关可控制来选择抽头处的分压比。第二电流传导路径包括与电流密度比第PN结更大的第二PN结元件串联连接的第二电阻元件。电压误差放大器具有连接到抽头和第二PN结元件的输入以及提供热补偿输出电压V的输出。反馈路径将输出电压V经第三电阻元件应用到第节点。 A band gap reference voltage generator has first and second current conduction paths between a first node and a second node. The first current conduction path has first resistive elements in series with a first forward-biased PN junction element. A tap is connected selectively to the first resistive elements through switches that are controllable to select a voltage divider ratio at the tap. The second current conduction path includes a second resistive element in series with a second PN junction element of greater current density than the first PN junction. A voltage error amplifier has inputs connected to the tap and the second PN junction element, and an output for providing a thermally compensated output voltage VREF. A feedback path applies the output voltage VREF through a third resistive element to