| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a differential input circuit for obtaining the same effect as a related art with simple structure, a receiving circuit which can remove its own internal offset and a transmitter/receiver using the same. <P>SOLUTION: The differential input circuit 221 has a differential amplifier AMP for amplifying a differential input signal inputted into each of a non-reversal input end and a reversal input end at a given gain to transmit it from an output end, a first resistor R1 provided in a single input path into the non-reversal input end, a second resistor R2 provided in the single input path into the reversal input end, a third resistor R3 provided in a pull-up path for pulling up the potential of the non-reversal input end to given potential, a fourth resistor R4 provided in a negative return loop from the output end to the reversal input end, and first and second switching circuits S1, S2 for opening and closing an input path of the differential amplifier AMP. <P>COPYRIGHT: (C)2006,JPO&NCIPI</p> |
