电流控制用半导体元件和使用它的控制装置

• Format: Patent
• Language: Chinese
• Published: 07.09.2016
• Subjects: BASIC ELECTRONIC CIRCUITRY; CODE CONVERSION IN GENERAL; CODING; DECODING; ELECTRICITY; PULSE TECHNIQUE

本发明提供种电流控制用半导体元件和使用它的控制装置，通过对增益（a）和偏置（b）的变动进行动态修正，能够在单芯片的IC内进行高精度的电流检测。在同半导体芯片上，具有晶体管（4）、电流－电压转换电路（22）和AD转换器（23）。参考电流生成电路（6、6'）在负载2的电流上叠加电流脉冲（Ic），使AD转换器输出的电压数字值变动。增益偏置修正部（8）对参考电流生成电路（6、6'）引起的电压数字值的变动进行信号处理，动态取得AD转换器（23）输出的电压数字值与负载的电流数字值的线性关系式中的增益（a、a'）和偏置（b、b'）。电流数字值运算部（12）使用由增益偏置修正部（8）取得的增益和偏置，对AD转换器输出的电压值进行修正。 A current control semiconductor device that can detect a current with high precision within an IC of one chip by dynamically correcting a variation in a gain a and an offset b, and a control device using the semiconductor device are provided. A transistor 4, a current-voltage converter circuit 22, and an AD converter 23 are disposed on an identical semiconductor chip. Reference current generator circuits 6 and 6′ superimpose a current pulse Ic on a current of a load 2, and vary a voltage digital value output by the AD converter. A gain/offset correction unit 8 subjects a variation in a voltage digital value caused by the reference current generator circuits 6, 6′ to signal processing, and dynamically