| 摘要 |
PURPOSE:To attain high through-rate with low power consumption by using an output of a current detection circuit provided at least one collector of a couple of transistors(TRs) so as to control a current source of an emitter of a relevant TR. CONSTITUTION:A current detection circuit 9 is provided to a collector of a TR 1 and an output of the current detection circuit 9 controls the current source 7. If an input signal Vin at an input terminal 3 rises rapidly, the TR 1 is going to be turned off and the collector current is decreased. It is detected by the current detection circuit 9 to increase the current of the current source 7 thereby preventing the TR 1 from being turned off. Then the potential at a connecting point P changes in following to the input signal Vin and an output signal Vout follows thereto, then the through-rate is increased. Since the current of the current source 7 is increased only at the transient state of the input/output signal, low power consumption and high through-rate are attained. |
