发明名称 |
Semiconductor device and electronic control device |
摘要 |
To suppress detection accuracy of a measurement resistance from decreasing by an on-resistance of a selector switch. The selector switch is provided between a first node coupled to a first voltage through a reference resistance and multiple second nodes coupled to the second voltage through measurement resistances, and selects the second node to be coupled to the first node with the selector switch. A correction circuit generates a voltage obtained by adding the second voltage to a voltage between the second node and the first node as a correction voltage. A double integral ADC finds a first integral time elapsed when a difference voltage of the correction voltage to a voltage of the first node is integrated to the first voltage and a second integral time elapsed when the difference voltage of the first voltage to the voltage of the first node is integrated to the correction voltage. |
申请公布号 |
US9461663(B2) |
申请公布日期 |
2016.10.04 |
申请号 |
US201514727935 |
申请日期 |
2015.06.02 |
申请人 |
Renesas Electronics Corporation |
发明人 |
Kon Masumi;Kudou Jou |
分类号 |
H03M1/06;H03M1/36;G01R27/02;H03M1/10;G01K15/00;H03M1/52 |
主分类号 |
H03M1/06 |
代理机构 |
Sughrue Mion, PLLC |
代理人 |
Sughrue Mion, PLLC |
主权项 |
1. An analog-to-digital conversion circuit configured to output a digital value of an input voltage by comparing the input voltage with a reference voltage, the analog-to-digital conversion circuit comprising:
an internal terminal configured to receive the input voltage; a reference terminal configured to receive the reference voltage; and an integrator circuit configured to integrate a voltage difference between the input voltage and the reference voltage, wherein the reference voltage is variable. |
地址 |
Kanagawa JP |