SU879736A1 - Frequency-modulated signal shaper - Google Patents

Description

The invention relates to radar and communication and can be used in radio measuring equipment as a source of electrical signals with frequency modulation. A shaper of frequency-modulated signals comprising a synchronizer connected in series, a reference signal generator and an error signal generation unit, as well as a peremployed generator, the output of which is connected to another input of the error signal generation unit, is known, while the second synchronizer output is connected to the control input of the generator voltage l However, in the known device near the stability limit of the capture mode, the transient process lasts much longer than in the middle of the band. synchronization, in addition, the error signal shaping circuit and the frequency manager, impressed on the basis of amplifying elements, possess inertial properties and also reduce the system speed in general. The aim of the invention is to increase the rate of change of frequency when the operating frequency band is increased. To do this, in a well-known form the frequency-modulated signals containing sequentially connected synchronizer generator stadium signals and an error signal generation unit, as well as a tunable generator, the output of which is connected to another input of the error signal generation unit, while the second synchronizer input is connected to the control input of the generator control voltage, between the output of the error signal generation unit, an adder is entered to the first control input of the tunable generator. The other input of which is connected to the code of the control voltage generator, while the second control input of the tunable generator is connected to the output of the generator of reference signals.

On fig. 1 shows a diagram of the proposed device; in fig. 2 - Eshbry stresses, which show the operation of the device.

The frequency modulated signal shaper includes a synchronizer 1, a generator of 2 reference signals, an error signal generation unit 3, a tunable generator 4, a control voltage generator 5, an adder 6.

The device works as follows.

The pulses of synchronizer 1 (Fig. 2) start the generators 2 and 5. The time interval fg between the pulses of the synchronizer is equal to the difference of delays between the excitation and response of the generator 2 of the reference Signals (Fig, 2.6) to the control voltage generator 5} (Fig. 2, c). Thus, at the same time, with the beginning of the operation of the standard Si1Nal (Fig. 2, b), the tunable generator 4 reads the action of the scg (Fig, 2c). the controller 5 of the control pair so that the instantaneous frequency (F1G, 2, g) of the 1X5 oscillator 4 tunable 4 varies according to a law close to the equivalent one (F.G. 2, C) If the current detuning of the frequency of the Tunable 4 signal cnjjiana (fig. 2, e) will obviously be 4yItT.le of the capture band of the tunable front PD: Seiyeragor 4, then set - (ts heapshare capture mode of the tunable frequency 4 by the frequency of the reference signal, t, e, te. ™ tavern frequency t-, , pereggrang. Yugo. Ratio 4 will correspond to the current "-th frequency e , and the current phase difference MeJiinj, the SCG phase. The generator and source signal 4 will be connected with the reference signal and the reference signal. The function of the formation unit 3 will be connected with the reference signal. The error signal is that ™ in ONE or several periods of the frequency modal to generate a signal

OB

) cife, (-1)

-pg

gda K - goats {| Sustainability of proportionality э T period of the power of the power of pipias, such that W. "H.Ky ,,,, .. (}

Thus, the error signal shaping unit 3 is required to possess significant inter- natal properties and could work out various slow changes in the law of frequency modulation, for example, the average frequency of the tunable generator 4 drift due to temperature, humidity, aging of circuit elements, etc. In the adder, Ujv and the signal of the generator 5 of the control voltage are added and form such a signal that ensures the fulfillment of condition (2) and. operation of tunable i nerator 4 in capture mode.

Thus, the proposed shaper of frequency-modulated signals is characterized by high maximum tuning speed and high accuracy in reconstructing the law of frequency modulation in the generated signal. In addition, it simplifies the manufacture and tuning of the entire device, which is associated with reduced requirements for the formation properties of the formation block 3 error signal

P o r iM invented

Shaper of frequency modulated signals,, -Soder; tangible sequentially created synchronizer, reference generator, signals n signal conditioning unit, as well as tunable input, whose input code is connected to the input of the error signal generation unit, while the second output of the synchronizer is connected to the control input of the generator control voltage, about-t of a l and h so that in order to increase the speed of change the chuoyu grigry resh (and) the band of working chao TOTj between each one of the error signal generation unit first control .11hodom tunable oscillator vve.-, den adder scheugoy input of which is connected to the output control voltage 1eneratora zheniYaa wherein the second control nkod pereotraimogo generator connected to the output of the generator etalonnEs signals.

Sources of information taken into account during the examination

1. Aleksanszzov S N. and Peret gin I.O. Frequency modulated signal generator based on recirculator. Instrument Engineering, Vol. XIX, 1976,. NO. 12, p. 77-81, fig. 3 (prototype ;.

ff

0ir, f

5u

one

Claims (1)

Claim Shaper of frequency-modulated signals containing a synchronizer, a reference generator, signals and a signal conditioning unit, errors, as well as a tunable generator whose output is connected to another input of the error signal generating unit, while the second output of the synchronizer is connected to the control input of the control generator voltage, with the fact that in order to increase the rate of change of frequency when extending the operating frequency band, between the output of the signal conditioning unit of error, the first adder of the tunable generator introduced an adder, the other input of which is connected to the output of the control voltage generator, while the second control input of the tunable generator is connected to the output of the reference signal generator.