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4218586 Compatible AM stereo broadcast system  
A compatible AM stereo broadcasting system is disclosed in which the signal is a carrier having an amplitude directly variable with monoaural or sum (L+R) information, and having an instantaneous...
4194154 Narrow bandwidth network compensation method and apparatus  
A method and means for compensating for the limited bandwidth of antennas and antenna coupling networks and other high powered modulated wave equipment characterized by generating a modulated wave...
4194088 Modulation monitor for AM stereophonic broadcasts  
Apparatus is described for removing stereophonic signals contained in a broadcast signal. Removal of a stereophonic indicator tone frequency on the broadcast signal is also provided. Separate...
4185171 Compatible single sideband system for AM stereo broadcasting  
A system for the transmission and reception of two program signals L and R on a single channel by means of a compatible SSB AM stereophonic signal having the form (1+L+R)cos(ωc t+φ) where φ is ar...
4182932 A-m stereo system  
Means and method for generation and combination at a transmitting apparatus and separation and demodulation at a receiving apparatus of two signals comprising carrier waves of the same frequency...
4159398 Stereo presence signal for an AM stereo system  
In an AM broadcast transmitter, an infrasonic tone is added to the difference channel of a compatible AM stereo system to provide a stereo presence signal. In a stereophonic receiver, the corrected...
4124779 Dual channel communications system particularly adapted for the AM broadcast band  
A communication system is adapted to particularly operate in the AM (amplitude modulated) broadcast band and accommodates stereo transmission via a left and a right channel. The system includes a...
4105868 AM stereophonic transmission system  
An AM sterophonic broadcast signal for transmitting stereophonically related first and second audio information signals to at least one receiver comprises a first carrier component, a...
4068100 Method and apparatus for transmitting and receiving amplitude modulated stereo  
The transmission of amplitude modulated stereo is achieved by modulating the positive and negative half cycles of a radio frequency carrier separately with a different one of the channels carrying...
3908090 Compatible AM stereophonic transmission system  
Amplitude modulation (AM) stereophonic transmission system characterized by the modulation of a radiant energy carrier wave with two stereo related signals, each appearing as a first order...
3803490 TRANSMISSION SYSTEM FOR STEREOPHONIC SIGNALS  
The invention relates to a transmission system for the transmission of two coherent stereophonic signals by means of single sideband modulation in which one of the signals is transmitted as an...
3732375 PAIRED SIGNAL TRANSMISSION SYSTEM UTILIZING QUADRATURE MODULATION  
Signal transmission systems for the transmission of a pair of information signals are provided in accordance with the teachings of the present invention wherein a pair of carrier signals in...
3255315 Apparatus for synchronizing stereophonic transmission  
3231672 Transmission system for stereophonic signals  
3218393 Compatible stereophonic transmission and reception systems, and methods and components characterizing same  
3217105 Angular-sideband signal-forming transmitter  
3167614 Multiplicative stereophonic sound signalling system  
3148342 Stereophonic signal transmission system  
3102167 Phase-shifted double-sideband two-channel a.m. communications system  
3087995 Multiplex communication transmitters  
3069679 Multiplex communication systems  
3068475 Stereophonic sound signalling system  
3068323 Amplitude modulation broadcast stereophonic system  
3067293 Single channel stereophonic broad-casting system  
3022378 Monaural-binaural transmission of sound  
3007005 Transmitter for stereophonic information signals  
2961615 High-level modulated signal amplifier system  
2907830 Signal transmission system  
2874221 Stereophonic transmission system  
2835889 Single side band communication system using mechanical filters  
Matches 51 - 80 out of 80 < 1 2