| 摘要 |
PROBLEM TO BE SOLVED: To provide a detection circuit capable of performing high-speed operation by reducing variations in detection voltage level, caused by process mismatching or the like, for each sample. SOLUTION: There are provided: a first detection receiver circuit in which one of a pair of serial data signals is input to an inverted input terminal and the other is input to a non-inverted input terminal; a second detection receiver circuit in which one of a pair of serial data signals is input to a non-inverted input terminal and the other is input to an inverted input terminal; and a detection circuit for performing at least either input detection or disconnection detection based on output signals from the first detection receiver circuit and the second detection receiver circuit. Each of the first detection receiver circuit and the second detection receiver circuit includes: a differential amplification circuit including a first differential input circuit and a first load circuit; and a first offset control circuit provided for a threshold of the differential amplification circuit. The first load circuit includes a pair of MOS transistors each having an independent drain and a common gate to which a predetermined voltage is applied. COPYRIGHT: (C)2011,JPO&INPIT |
