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4241452 |
Automatic frequency control system
Automatic frequency control (afc) particularly for single sideband (SSB) receiving systems. In a SSB receiving system, fine tuning is carried out using an afc loop. In one embodiment the loop...
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4206410 |
Automatic frequency control system for single sideband signal receiver
A single sideband receiver having a demodulator or mixer for carrier frequency demodulation in response to the output of a controllable variable frequency oscillator and an intermediate frequency...
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4204172 |
Automatic gain control device for a single-sideband receiver
A circuit determines whether the signal transmitted by a variable-gain amplifier comprises information or not. If it comprises information, its level is regulated, by comparison with a first...
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4193035 |
Circuit arrangement for receiving one of the sidebands from a double sideband signal
The invention relates to an AM-receiver for receiving one of the sidebands of a double sideband signal, for example, in medium wave or short wave broadcast. Selective fading is avoided by the...
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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(ω c t+φ) where φ is...
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4050024 |
Sideband detector
A sideband detector capable of detecting one of two mixing products and disregarding the other is provided. The characteristic of the invention is provided by feeding a sequential logic mixer in...
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4042782 |
High selectivity radio receiver
A superheterodyne receiver for double sideband signals employing two filters having bandwidths encompassing the carrier and sidebands, and providing equal attenuation of signals at the desired...
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3973203 |
Carrier isolation system
A circuit is described for operating on a carrier wave in a transmission signal including a reduced carrier with a single sideband. The carrier wave is isolated, limited, divided in frequency by a...
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3769589 |
RATE AIDED RANGING AND TIME DISSEMINATION RECEIVER
A receiver is described for processing tone ranging signals from a time dissemination satellite such as TIMATION II. The receiver derives either receiver-station time (clock synchronization) or...
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3748584 |
APPARATUS FOR FEEDING A SINGLE SIDEBAND RECEIVER
A control device is provided for supplying power to a SSB receiver during a watching period. During periods between transmissions, receiver power controlled by means of a clock is supplied...
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3746996 |
ASYNCHRONOUS SINGLE-SIDEBAND DEMODULATION
Asynchronous or noncoherent demodulation, i.e., demodulation without employing a carrier wave at the receiver to multiply the incoming channel signal, of single-sideband signals is accomplished...
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3675131 |
COHERENT SINGLE SIDEBAND PHASE LOCKING TECHNIQUE
A phase-locked loop system capable of producing a synchronous reference of the proper frequency and phase to coincide with the frequency and phase of a transmitted single sideband modulated signal...
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3643165 |
MODULATED CARRIER WAVE COMMUNICATION APPARATUS
Apparatus for recovering information signals from modulated carrier waves is provided in accordance with the teachings of the present invention. According to one embodiment of this invention,...
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3577082 |
CARRIER FREQUENCY PHASE-READJUSTMENT DEVICE
A phase synchronizing device for the carrier of a single sideband transmission system. Two pilot frequencies are transmitted with the synchronization signal and are decoded at the receiver to...
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3577081 |
METHOD AND ARRANGEMENT FOR SYNCHRONIZATION OF THE SUPPLEMENTARY CARRIER FREQUENCY OSCILLATOR
A suppressed carrier single sideband signal is received, converted to an ermediate frequency, and fed to a preferably square law detector for generating a reference signal derived from the...
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3560654 |
MODULATION AND DEMODULATION APPARATUS USING REFERENCE TIME FUNCTIONS
A single-sideband modulator and demodulator are realized by using reference time functions. The desired modulated or demodulated signals are generated by modulating and filtering a train of pulses...
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3430151 |
AMPLITUDE MODULATION DETECTOR FOR SINGLE SIDEBAND OR SUPPRESSED CARRIER INPUT
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3390343 |
Single side-band pulse product detector
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3370241 |
Hall effect multiplying arrangement
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3358234 |
Ssb system which overcomes problems of squelch, impulse interference and agc as commonly encountered
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3331025 |
Automatic frequency control system for side-band receivers
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3310745 |
Fast agc voltage decay circuit for data signal handling sideband receivers
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3308389 |
Leakage elimination circuit
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3271681 |
Automatic system for correcting for doppler shift in single sideband communications equipment
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3271682 |
Doppler-shift corrector for single sideband communications systems
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3229231 |
Single side band hall-type modulator and demodulator
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3217255 |
Synchronous communication system
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3175155 |
Submodulation systems for carrier re-creation and doppler correction in single-sideband zero-carrier communications
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3100871 |
Single sideband receiver having squelch and phase-locked detection means
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3099714 |
Stereophonic receiving apparatus
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3040125 |
Method and apparatus for recording and reproducing video signals
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3003037 |
Transmission system
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2979610 |
Single side-band receiver for reception of single side-band signals by means of a carrier-wave frequency
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2976411 |
Automatic frequency control system suitable for single-sideband receivers, frequency modulation transmitters and the like
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2976410 |
Automatic frequency control system
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2943193 |
Synchronous detection system
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2943191 |
Signal translating system
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2876346 |
Circuit system for demodulating high frequency signals
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2874222 |
Single-sideband system
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2849605 |
Single sideband communication system
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2783372 |
Automatic gain control system
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