| 摘要 |
An impulse convertor for converting a received telephone impulse dialing signal into a restored dialing signal has a limiter-amplifier, a signal detector, an output formatter, and a controller. The limiter-amplifier receives the received impulse dialing signal, limits the amplitude range of the received impulse dialing signal, and compensates for attenuation of the received impulse dialing signal. The signal detector analyzes successive portions of an output signal generated by the limiter-amplifier and determines dialed digits represented by the received impulse dialing signal. The output formatter converts the dialed digits determined by the signal detector into the restored dialing signal. The controller coordinates operation of the limiter-amplifier, signal detector, and output formatter. |
