| 摘要 |
<p>16 A polar loop transmitter in which a negative feedback bias adjusting system is provided to control the bias voltage applied to a differential amplifier which supplies the input envelope information to an amplitude modulator, so that the R.T. modulate output goes to zero for a zero in the input envelope information. The negative feedback bias adjusting system modifies a predetermined bias voltage supplied by a potentiometer by sampling the holding the peak value of negative spikes occurring in the output of the differential amplifier and using the held value as a negative feedback voltage to the differential amplifier.</p> |
