| 摘要 |
<p>PURPOSE:To prevent an antenna module control signal from staying ON by resetting the antenna module control signal properly when a pulse width modification signal is output. CONSTITUTION:A transmission pulse control circuit allows a pulse modification signal to be fed to a one-shot circuit 15, a pulse with a proper length to be output only when the pulse width modification signal is output, the pulse to be multiplied by a signal with a proper timing from a pulse width latch 5 and a pulse period latch 8, and then the antenna module control signal to be reset immediately after a transmission pulse is output. Only when the pulse width modification signal is input, the antenna module control signal is reset at a proper timing and control is made so that a pulse can be transmitted properly when the pulse width modification signal is input, thus avoiding generation of an antenna module control failure and hence preventing the antenna module control signal ON from staying at, ON-situation.</p> |
