| 摘要 |
<p>Disclosed is a buffer circuit comprising first and second cascode constant current sources (11, 12), a constant current source (13), a resistive load (20) connected at one end to the output of the first cascode constant current source (11) and connected at its other end to the output of the constant current source (13), a first transistor (21) having a source connected to the output of the second cascode constant current source (12), a second transistor (22) having a source connected to a predetermined power supply node, a drain connected to the drain of the first transistor (21), and a gate connected to a connection point between the first cascode constant current source (11) and the resistive load (20), and a third transistor (23) having a source connected to the drain of the first transistor (21), a drain connected to a connection point between the constant current source (13) and the resistive load (20), and a gate connected to the source of the first transistor (21).</p> |
