| 摘要 |
PURPOSE:To provide the optical spatial digital signal transmitter without generating pulse width fluctuation by solving the problem with the pulse width fluctuation generated concerning the optical spatial digital signal transmitter used for transmitting the wireless signal of a digital output equipment such as a CD, DAT or BS tuner. CONSTITUTION:A digital signal is inputted to an edge modulation part 5, inputted to an electric/optic conversion part 6 by means of an LED and turned to a digital signal which waveform is made dull by the response time of the LED, the signal is converted to light and outputted, the optical output signal is inputted to the optic/electric conversion part 7, the output signal is amplified by an amplification part 8, and the output signal is digitally outputted after the waveform is shaped by a waveform shaping part 9. The digital signal is demodulated by an edge demodulation part 10, and the pulse width fluctuation can be prevented from being generated by the difference of response time between the time when the LED is rises and falls. |
