| 摘要 |
PROBLEM TO BE SOLVED: To solve a problem of a timing shift of pulses due to a difference in wire length and enable the emission of optical pulses of a shorter light emission time at a high transfer rate by reducing the number of wirings. SOLUTION: An emitter grounded circuit 18 having a single circuit analog signal input system converts a voltage signal J1 inputted from an input terminal 18a into a current signal, and is so structured that a signal output from a high frequency oscillator circuit 20 is added to the current signal of the emitter grounded circuit 18 at the time of regeneration. A signal on the J1 side is boosted for a higher area within a band of a transistor Q6 while the deterioration of the output signal of the high frequency oscillator circuit 20 is kept as small as possible by means of a base grounded circuit of the transistor Q6. A current switching circuit 16 cuts off or passes a current inputted into a current mirror circuit 12 in a next stage to cut off or output an output current of the current mirror circuit 12. COPYRIGHT: (C)2003,JPO |
