SU792594A2 - Device for readjusting generator frequency - Google Patents

Description

Union of Soviet

Socialist

Republics.

DESCRIPTION

Inventions

TO COPYRIGHT CERTIFICATE (11) 792594

(61) Additional to author Certificate No. 634445 (22) 3Approved 05.01.79 (21) 2707942 / 18-09 with the application No. (51) M. Cl

H 03 7/00

State Committee

USSR for Inventions and Discoveries (23) Priority -

Published 12/30/80. Bulletin No. 48

Date of publication of the description 04.01.81 (53) UDC 621.396. .662 (088.8) (72) Author of the invention

B. S. Dobroborsky (71) Applicant (54) DEVICE FOR FREQUENCY RESPONSE _

GENERATORS ~ ·· /; ~~ ':' * '; <'' '

2

The invention relates to the technique of appropriate integrators, and to the output and can be used in devices of television, radar, measuring equipment.

According to the main author. St.

No. 634445, a device for tuning the frequency of generators is known, comprising two generators, the inputs of which are connected to the corresponding integrators, and to the outputs are a series-connected mixer, an intermediate frequency amplifier and a pulse shaper, the output of which is connected to the input of the subtracting counter and the first input of the trigger, to the second input which sub _t counter output key, and outputs connected to inputs of the trigger integrators.

O1 However, this device has a low tuning accuracy.

The purpose of the invention - an increase tochnoe- _g ti setup.

To do this, in the device for tuning the frequency of the generators, containing two generators, to the inputs of which the ladies are connected - a series-connected mixer, an intermediate frequency amplifier and a pulse shaper, the output of which is? It is connected to the input of the subtracting counter and the first input of the trigger, to the second input of which the output of the counter is connected, and the outputs of the trigger are connected to the inputs of integrators, the generators are connected to the mixer through a switch, the control inputs of which are connected to the outputs of the pulse shaper and the trigger, and the additional output is connected to the input intermediate frequency amplifier ^ a frequency divider is connected between the output of one of the generators and the auxiliary input of the switch.

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

A device for tuning the frequency of generators contains a mixer 1, an amplifier 2 of an intermediate frequency, a pulse shaper 3, a trigger 4, a subtracting counter 5, integrators 6,7, generators S, 9, a frequency divider .10, and a switch 11.

The device operates as follows.

the beginning of work, until information on the number of switchings (tunings) for tuning to the required frequency is entered into the subtractive counter 5, the subtractive counter 5 is in position O, the trigger 4 and integrators 6 are turned off, the switch 11 closes the circuit between the output of the frequency divider 10 and the input amplifier 2 of the intermediate frequency and opens the circuit between the outputs of the generators 8 and 9 and the corresponding inputs of the mixer 1. The generators and 9 generate some frequency £ _{o <} and ίθ-2. respectively, and their value must be below the value of U ^{n =} np * tse J £ - £ _by - frequency mood 'filtra'usilitelya ki 2} of the intermediate frequency

P is the division ratio of the frequency divider 10;

and the difference And between £ ₀₁ , £ Q2 ^and ^ 0 should be less than £ ^п г * The output voltage of the frequency £ q ^ from the generator 8 goes to the input of the frequency divider, _ is divided there and through the switch 11 goes to the input of the amplifier 2, and since the value , · £ 4 £ _p p, there is no signal at the output of amplifier 2.

When the corresponding number of switchings is introduced into the subtracting counter 5, trigger 4 is turned on and goes into a state in which integrator 6 is turned on.

Under the action of the integrator 6, the generator 8 begins to be tuned up to reaching the frequency £ θ, at which the frequency equal to £ _pr at the output of the frequency divider

The frequency signal 1 ^ p through the switch 11 is fed to the input of an intermediate frequency amplifier 2 and then to a pulse shaper 3.

Under the action of the signal, the trigger 4, switch 11 switches to the opposite state from the pulse shaper 3, and one is subtracted from the subtracting counter 5.

When switching the switch 11 circuit between the output of the frequency divider

792594 4 and the input of the amplifier 2 breaks and closes the circuit between the outputs of the generators 8 and 9 and the first and second inputs of the mixer 1, respectively. When trigger 5 is switched on, integrator 6 turns off and integrator 7 turns on, and generator 9 starts to rebuild.

As a result of switching, at the initial moment, a signal with a frequency £ q is received at the first input of mixer 1 from the first generator 8, and a signal with a frequency £ from the second generator 9 comes to the second input of mixer 1.

From the output of mixer 1, the difference signal is fed to the input of the intermediate frequency amplifier 2, ²⁰ Since ή £ 4. £ _P p, there is no signal at the output of the intermediate frequency amplifier. Under the action of the integrator 7, the generator 9 begins to rebuild, its frequency reaches a value of ²⁵ £ q and then a value of £, which differs from £ ₀ by £ _П р · '. At the same time, a signal appears at the output of the intermediate-frequency amplifier, which arrives at the 3 pulse shaper.

3 ° Under the action of the signal from the pulse shaper 3, the unit is again subtracted from the subtracting counter 5, and trigger 4 is switched. In this case the integrator 7 is turned off and switched integrator 6, under the action of which the generator 8 again begins to rebuild the frequency £ 2> different from £ £ in _EXAMPLE from ₀ £ 2 £ ήρ etc.

'In the process of tuning, the generators ^{40 are} alternately tuned to the frequency · 2 { _P p until the desired frequency is reached.

Since the number of switching corresponds to the counter 5 entered in subtracting 45, the latter reaches state O. In this case, trigger 4 is turned off, and under its action, control voltages are reset from integrators 6 and 7 and switch 11 * ⁵⁰ switches to its initial state,

The proposed device increased the accuracy of tuning the frequency of the generators.,

Claims (1)

The invention relates to communication technology and can be used in television devices, radio satsni, iairn thermal technology. According to the main author. St. h &amp; 634445, a device is known for frequency tuning of generators, containing two generators, to the inputs of which the respective integrators are connected, and to the outputs - a serially connected mixer, an intermediate frequency amplifier and a driver of pulses, the output of which is connected to the input of the detracting counter and the first trigger input, to the second input of the counter output is connected, and the trigger outputs are connected to the inputs of the ingragragors. QiHaKo this device has inaccurate tuning accuracy. The invention is an increase in precision tuning. For WTO, in a device for tuning the frequency of generators, containing two generators, to the inputs of which are connected; corresponding integrators, and to the outputs - serially connected mixer, intermediate frequency amplifier and pulse shaper, the output of which is connected to the input of the detracting counter and the first trigger input, to the second input of which the counter output is connected, and the trigger outputs are connected to the integrator inputs, generators are connected to the mixer through a switch, the control inputs of which are connected to the outputs of the pulse former and the trigger, and the additional output to the input of the intermediate frequency amplifier. a Between the output of one of the generators and an additional input of the switch, the frequency divider is turned on. The drawing shows a structural electrical circuit of the proposed device. The device for tuning the frequency of the generators contains a mixer 1, an amplifier 2 intermediate frequency, a shaper 3 pulses, tripper 4, subtracted counter 5, integrators 6.7, generators 8, 9, divider frequency 10 and switch 11. The device works as follows . At the beginning of work, until the information on the number of switches (reorganizations,) for HajTpoiiKH at the required frequency is entered into the subtracting counter to 5, the subtraction counter 5 is in the O position, the trigger 4 and the integrators b and 7 are turned off, switch 11 closes the circuit between output divider 10 frequency and input amplifier 2 intermediate frequency and opens the circuit between the outputs of the generators 8 and 9 and the corresponding inputs of the mixer 1. Generators 8 and 9 produce some frequencies and io2, respectively, and their value should be below the value of P e - i nju - value lowering the frequency of tuning the filter amplifier 2 intermediate frequency} f} is the division factor of the 10 frequency divider; and the difference. between tqv. О2 О should be less than i. The output voltage IQ from the generator 8 is fed to the input of the divided frequency and is shared there, and through the switch 11 to the input of the amplifier 2 and the value iQ - PR &amp; 2 of the amplifier is absent. When a corresponding number of switchings are introduced into the subtracting counter 5, trigger 4 is turned on and transferred to a combination in which integration is activated 6. Under the influence of integrator 6, generator 8 begins to tune until the frequency IQ is reached, at which the output of the frequency divider equals if, p Signal frequency Ifjn through the switch 11 is fed to the input of the amplifier 2 intermediate frequency and then wa formator 3 pulses. Under the action of a signal with a formulated 3 pulses, the trigger state 4 is switched into the opposite state, the switch 11, and the subtracting counter 5 subtracts one. When switching the switch 11, the circuit between the output of the frequency divider and the input of the amplifier 2 is broken and the circuits between the outputs of the generators 8 and 9 and the first and second inputs of the mixer 1, respectively, are closed. When trigger 4 is switched, integrator 6 is turned off, and integrator 7 is turned on, and generator 9 begins to tune. As a result of switching to the initial moment, the first input of mixer 1 from the first generator 8 receives a signal with frequency t o, the second input of mixer I - a signal with a frequency of 1 Q with a Btoporo oscillator 9. From the output of mixer 1, the difference signal is fed to the input of amplifier 2 of intermediate frequency, Since ii .fnp the output of intermediate frequency amplifier there is no signal. Under the action of the integrator 7, the generator 9 begins to tune, its frequency reaches a value that differs then the value of the state from i Q to i fj p. In this case, a signal appears at the output of the intermediate frequency amplifier, which is fed to a shaper of 3 pulses. Under the action of the signal from the pulse shaper 3 from subtracting counter 5, one is again subtracted, and trigger 4 is switched. In this case, the integrator 7 is turned off, and the integrator 6 is turned on, under the action of which the generator 8 again begins to tune to a frequency f p different from 1 AND from ± Q on and so on. In the process of tuning, the generators are alternately tuned to the frequency 2ij. J until the required frequency is reached. Since the number of switches corresponds to that entered into subtractive counter 5, the latter reaches the state O. Then this trigger 4 is turned off, and under its effect the control voltages from integrators 6 and 7 are reset and switch 11 i switches to the initial state, In the proposed device, the accuracy of tuning the frequency of the generators is improved. Formula for tuning the frequency of generators according to the author. St. Fe 634445, 5 is different in that, in order to improve the accuracy of tuning | G &amp; nerators are connected to the mixer through a switch, the control inputs of which are connected to the outputs of the pulse shaper to the trigger, the additional output to the input of the amplifier of the intermediate frequency, and between one output 4 of 1-generators and an additional switchboard intercom, the frequency divider is turned on. Sources of information taken into account in the examination 1. Copyright svdedelstvo USSR № 634445. cl. H 03 B 3/00, 20.06. 77.