SU748842A1 - Pulsed frequency converter - Google Patents

Description

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The invention relates to pulsed technology and can be used in frequency shaping devices.

There is a frequency synthesizer that contains j connected in series: a reference pulse generator, a frequency divider with a variable division factor, and a trigger to the installation input of a frequency divider with a variable Q dividing ratio prd is output of the control loop; between the second output of the prohibition I-INPUT control unit. A variable frequency division factor is introduced to the analyzer of the temporal position of outgoing pulses, the second and third KOTOiiboro inputs are connected with each other) to the input and output frequency dividers with a variable factor of 2 or none.

“However, the well-known frequency synthesizer pho; generates a sequence of pulses with small irregularities by greatly complicating the synthesis circuit.

The closest in technical solutions is a device for pulse frequency conversion, which is sequentially switched on by JQ

clock pulse generator, frequency divider and pulse number converter, the other input of which is connected to the output of the clock pulse generator 2.

However, in the known device for pulse frequency conversion, in order to reduce the non-uniformity of the pulse following in the output pulse sequence, the frequency at the output of the pulse number converter must be reduced, which leads to complication of the device circuit. In addition, at a frequency of the output pulse sequence close to the frequency of the clock generator signal, it is possible to obtain a spectrum of the output pulse sequence with a minimum level of spurious components only an additional improvement in signal selection. This also leads to a significant complication of the device.

The purpose of the invention is to reduce the non-uniformity of the pulse frequency in the output pulse sequence.

To do this, a pulse frequency converter, containing a series-connected clock generator, a frequency divider and a pulse number converter, the other input of which is connected to the output of the clock generator, is connected in series with a connected sawtooth generator, controlled one-shot and one-shot output The input of the sawtooth voltage generator is connected to the output of a frequency divider, and the other input of the controlled one-slot is connected to the output of the inverter zovatel number of pulses.

FIG. 1 shows a structural electrical circuit of the device for pulse frequency conversion in FIG. 2 — Essors of voltages in the mode of subtraction of pulse sequences; in fig. 3 - .. voltages in the mode of addition, pulse sequences. .

Device For pulse frequency conversion contains a generator

1-stroke pulses, a 2-frequency divider, a 3-pulse number converter 3, a saw-tooth voltage generator 4, a controlled one-shot 5 and an output one-shot 6.

A device for pulse frequency conversion. Works as follows.

From the generator output 1 clock pulses; The initial pulse sequence (Fig. 2a, Za) is fed to frequency divider 2 with a division factor n and to the converter 3 of the number of pulses. From the output of the divider

2h) gothm pulses are applied to the transducers 3, the number of pulses (Fig. 2b, 3g). In the converter 3 of the number of pulses, the addition or addition of one pulse from each n pulses of the initial pulse sequence occurs (Fig. 2b, 3b). From the output of the converter 3 of the number of pulses, the pulse sequence arrives at the input-controlled one-vibrator 5 and further to the input of the output one-selector 6. Purpose of the controllable and output one-vibrators 5 and 6, respectively, as well as par 4 of the sawtooth. It is necessary to make a uniform sequence of pulses from a time-uneven pulse sequence at the output of the converter 3 of the number of pulses (Fig. 2b, 3b), thus increasing the level of the useful component and reducing the parasitic frequency components in the output signal spectrum. Pulses with frequency. With ayhbda divider 2, the frequencies are fed to the input of the generator 4 of the sawtooth voltage (Fig. 2b, 3b), from the output of which is to the front. to the front: the ACCURATE impulse is removed sawtooth voltage with a certain amplitude and AND | pulse shape (fig. 21 f 3g) and step. to the control input of the controlled one-vibrator 5, which, in accordance with the level of the saw voltage on the control input, at the moment selects pulses with a certain duration (fig. 26 39). From the output of the controlled one-shot 5, pulses are taken, which with their front trigger the output one-shot 6, from the output of which pulses of a certain and constant duration arrive at the output of the device (Fig. 2e, Ze).

Claims (2)

1. USSR author's certificate No. 553738, cl. H 03 K 5/156, H 03 B 19/00, 1975. 2. USSR author's certificate number 579693 cl. H 03 K 5/156, 1977 (prototype). VuL-f Jt - but Jl L l lp l in paJLTUJI p pn | l l rUlJL JL JT Jl, . € ji-jrTJ njiJi ji jnj-n lJlJlJl.