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| Number | Title | Issue Date |
| 4617536 | Amplitude modulation apparatus and method An apparatus and a method modulate a carrier signal so that the resultant modulated signal varies between a value substantially equal to the quiescent level of the carrier signal and peak values up to several hundred percent of the quiescent level of the ... | 10/14/1986 |
| 4295106 | Method and means for introducing additional asymmetry into audio waves Audio processing equipment for introducing additional asymmetry so as to provide increased fullness of modulation of associated transmitters. Audio waveshapes are altered so as to accentuate the positive going portions of the waveshape. The alteration of ... | 10/13/1981 |
| 4225822 | Amplitude modulation circuit for a transmitter An amplitude modulation circuit for a transmitter has an automatic level controlled circuit (ALC circuit), including in its negative feedback loop a series circuit of a high-pass filter, a rectifier circuit and an eliminator circuit, for modulation degree... | 09/30/1980 |
| 4088956 | Automatic modulation percentage control for amplitude modulated transmitters An automatic modulation percentage control for amplitude modulated transmitters wherein a percentage detection circuit responsive to a sample signal from the transmitter and functioning at a selected modulation percentage generates a gain-reduction bias f... | 05/09/1978 |
| 4038603 | Transmitter modulation limiter A resistor is inserted between the audio signal and the primary winding of a conventional modulating transformer used in an amplitude modulated transmitter. The value of the resistor is selected to limit the peak signals into the transformer thereby limit... | 07/26/1977 |
