SU902297A1 - Device for transmitting frequency-modulated signals - Google Patents

Description

one

FIELD OF THE INVENTION The invention relates to radio engineering and can be used as radio communication, rodiolokhsh | radio telemetry, radio control for the formation of frequency-manipulated (FM) sine-wave oscillations.

A device for transmitting FM signals is known, containing the first and second generators, the outputs of which are connected to the load via the first and second keys, respectively, and the second inputs of the keys are connected to the corresponding trigger outputs, whose information input is connected to the output of the sensor of digital signals CI.

However, the known device has a low transmission rate.

The purpose of the invention is to increase the speed before.

This goal is achieved by heme that in the device for transmitting FM signals containing the first and second generators, the outputs of which, respectively, are connected to the load via the first and second keys, and the second inputs of the keys are connected to the corresponding trigger outputs, the information input of which is connected to the output sensor of discrete signals, a threshold block, a third key, a pipoeray voltage generator are introduced into the first and second formers of impulses whose inputs are connected, respectively, with the outputs of the first and second generations Hur, vykoa. The first pulse shaper is connected via a serially connected saw-tooth voltage generator, this key and the threshold unit are connected to the trigger input of the trigger, and the output of the second pulse shaper is connected to the second inputs of the saw voltage generator and the third key.

The drawing shows a structural electrical circuit of the proposed device.

Claims (1)

A device for transmitting FM signals contains two generators {5a I and 2, load 3, two keys 4 and 5, a pipiform voltage generator 6, a third key 7, two impulses 8 and 9 pulses, a trigger 10, a threshold unit II and a sensor 12 discrete signals. The device works as follows. The output voltages of the generator I (lower frequency) and generator 2 (upper frequency) are fed to the first inputs of the electronic switches 4 and 5, respectively. The operation of the keys 4 and 5 is carried out from the output voltages of the trigger 10, the information input of which is supplied with the voltage from the output of the sensor 12 discrete signals, and the synchronization input is supplied with the voltage from the output of the threshold unit 11. For the liver the necessary phase ratios at switching part generator generators I and 2, the part of the output voltages of the latter is fed to the input of the formagens of 8 and 9 pulses, respectively, which convert the sinusoidal voltage to the rectangular pulses of positive polarity and whose duration does not exceed half period of the input voltage generators 8 and 9 pulses, and the rising edge of each pulse corresponds to the transition of a negative to a positive voltage at the input of each of the generators 8 and 9 pulses. The leading edge of the pulse from the output of the pulse former 9 starts a generator 6 of sawtooth voltage. The sawtooth pulse ceases at the moment of the appearance of a pulse from the output of the pulse former 8 pulses. This ensures the conversion of the phase lag of the voltage of the generator 1 (lower frequency) relative to the phase of the voltage of the generator 2 (upper frequency) into the amplitude of the sawtooth voltage. The amplitude value of the sawtooth voltage is applied through the third key 7, controlled by the output voltage of the pulse shaper 8, to the threshold unit II, where it is compared to the ursine corresponding to the difference in level matching, the threshold unit 11 outputs the pulse supplied to the trigger input of the trigger Y. Thus, the condition the operation of switches 4 or 5 is the corresponding polarity of the voltage. The output of the sensor is 12 discrete signals and the presence of a pulse at the output of the threshold unit II, which means the provision of such phases relations between the voltages of the generators I and 2, at which there is no transient: at the output of the load 3, the input of which is simultaneously connected to the outputs of the keys 4 and 5. Thus, the effectiveness of the proposed device consists in obtaining almost instantaneous frequency jumps on the load, for example oscillating circuit. The use of the proposed device allows to eliminate information distortions under the influence of transients. This makes it possible to increase the information transfer rate during the channel bandwidth in radio communications, radar, radio telemetry, radio control, which distinguishes it from the known one. Apparatus of the Invention A device for transmitting frequency-manipulated signals, comprising first and second generators, the outputs of which, respectively, are connected to the load via the first and second keys, and the second inputs of the keys are connected to the corresponding trigger outputs, the information input of which is connected to the output of the sensor of discrete signals that are different In order to increase the transmission speed, a threshold block, a third key, a sawtooth generator, and the first and second pulse shapers, the inputs of which are connected to the outputs of the first and second generators, the output of the first pulse generator through the serially connected sawtooth voltage generator, the third key and the threshold unit is connected to the trigger input of the trigger, and the output of the second pulse generator connected to the second inputs of the sawtooth voltage generator and the third key . Sources of information taken into account in the examination I. Shbersky V. I, Fundamentals of the technology of transmission of discrete connections. M., Holy Hour, 1973, p. 210 (prototype).