| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an optical transmitter circuit which is capable of driving a light emitting element at a desired high speed. <P>SOLUTION: A first peaking current generating section 1 generates a first peaking current P1 having a steeple shape, which is positive at the rising edge and negative at the falling edge, in synchronism with the transitions of a digital signal S. A second peaking current generating section 3 generates a second peaking current P2 having a steeple shape, which is negative at the rising edge and positive at the falling edge, in synchronism with the transitions of the digital signal S. A first light emitting element driving section 2 produces a first driving current D1 obtained by combining a signal amplitude current according to the amplitude of the digital signal S and the first peaking current P1. A second light emitting element driving section 4 produces a second driving current D2 obtained by combining the signal amplitude current according to the amplitude of the digital signal S and the second peaking current P2. Then, the first and second light emitting element driving sections 2 and 4 drive a light emitting element 5 by using a driving current D3 obtained by subtracting the first driving current D1 from the second driving current D2. <P>COPYRIGHT: (C)2008,JPO&INPIT |
