| 摘要 |
<p>PURPOSE:To enable large scale integration and to make easy the alteration parameter, by using digital circuit elements and transmitting FM pulse of broad band. CONSTITUTION:The signal generating system of each channel starts the interval timer ITi with the output of the programmable interval timer PITi counting the transmission delay time, and the time counted with ITi is converted FTM into frequency, this frequency is summed and the instant phase is calculated ADD, the instant phase is converted STM into sinusoidal function, the amplitude of sinusoidal function is altered MPY, and the output signal is converted DAi into analog signal.</p> |
