发明名称 |
SEMICONDUCTOR DEVICE, ANALOG-TO-DIGITAL CONVERSION METHOD, ONBOARD SYSTEM, AND MEASUREMENT METHOD |
摘要 |
There is provided a semiconductor device including: an integrator that repeats integrating a first reference voltage after integrating an analog signal; a comparator that compares an output of the integrator and a second reference voltage; a counter circuit that counts a first integration time determined to integrate the analog signal, and a second integration time until the output of the integrator reaches the second reference voltage from start of integration of the first reference voltage; a calculation circuit that calculates a digital value of the analog signal based on the first and the second integration times; a control circuit that performs control so that the analog signal is input to the integrator while the counter circuit counts the first integration time; and an integration time update circuit that updates the first integration time counted by the counter circuit based on the second integration time counted thereby. |
申请公布号 |
US2016053705(A1) |
申请公布日期 |
2016.02.25 |
申请号 |
US201514827287 |
申请日期 |
2015.08.15 |
申请人 |
RENESAS ELECTRONICS CORPORATION |
发明人 |
GOTO Masashi |
分类号 |
F02D41/26;H03M1/00;F02D41/30;H03M1/38;G01R19/257;G07C5/02;G06G7/18;H03M1/12 |
主分类号 |
F02D41/26 |
代理机构 |
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代理人 |
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主权项 |
1. A semiconductor device comprising:
an integrator that repeats integrating a first reference voltage after integrating an analog signal; a comparator that compares an output of the integrator and a second reference voltage; a counter circuit that counts a first integration time determined to integrate the analog signal, and a second integration time until the output of the integrator reaches the second reference voltage from start of integration of the first reference voltage; a calculation circuit that calculates a digital value of the analog signal based on the first and the second integration times; a control circuit that performs control so that the analog signal is input to the integrator while the counter circuit counts the first integration time; and an integration time update circuit that updates the first integration time counted by the counter circuit based on the second integration time counted by the counter circuit. |
地址 |
Tokyo JP |