| 摘要 |
<p>PROBLEM TO BE SOLVED: To enable switching between a PECL output and an LVDS output with a small number of components, and to output an output signal having a satisfactory characteristic.SOLUTION: A signal output circuit includes: a first transistor 11; a second transistor 12; a first output terminal 55; a second output terminal 56; a first resistor 21 disposed between the first transistor 11 and the first output terminal 55; a second resistor 22 disposed between the second transistor 12 and the second output terminal 56; a first switch 31 for switching whether or not to make short-circuit between the first transistor 11 and the first output terminal 55; a second switch 32 for switching whether or not to make short-circuit between the second transistor 12 and the second output terminal 56; and a switching unit 60 for switching whether or not to lead a current, input from the first output terminal 55 or the second output terminal 56, to the ground, in cooperation with whether or not the short-circuit is made between the first transistor 11 and the first output terminal 55 and the short-circuit is made between the second transistor 12 and the second output terminal 56.</p> |
