Digital computing synthesizer |
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IPC classes for russian patent Digital computing synthesizer (RU 2286645):
                
 Digital signals synthesizer / 2257669
Device has standard support generator, delay block, first memory register, first digital accumulator, second digital accumulator, third digital accumulator, codes converter, analog-digital converter, low frequency filter, second memory register, divider with variable division coefficient, delay multi-vibrator.
 Digital signal synthesizer / 2250560
Proposed digital signal synthesizer has first and second delay circuits, low-pass filter, and three parallel channels, each incorporating pulse counter, memory unit, digital-to-analog converter, analog switch, analog adder, and delay circuit.
 Frequency mixer / 2276452
Proposed frequency mixer that can be used for mixing and multiplying frequencies in radio and measuring equipment has nonlinear component built of three inductance coils, as well as nonlinear-magnetization superconductor core, both immersed in cryostat cooling agent.
 Frequency divider / 2266609
Proposed frequency divider that can be used, for instance, as synchronized-wave source in radio transceiving, radio receiving, and electrical devices has inductance coil, semiconductor diode, capacitor, and bias voltage supply; in addition, it is also provided with newly introduced transistor whose collector and emitter are connected to respective unlike-polarity electrodes of semiconductor diode, communication inductance coil connected to transistor base and to common point of device and magnetically coupled with inductance coil, as well as loading resistor inserted between inductance coil and common point of device.
 Nonlinear signal generation method / 2262797
Proposed method involves conversion of linear signal into nonlinear one by parametric addition of linear signal with pumping signal and using them to act upon nonlinear formation created on the way of linear signal propagation in the form of man-made ionized formation or magnetic base plasma formation, parameters of linear and pumping signals being variable; linear signal and/or pumping signal is controlled by nonlinearity parameters of nonlinear formation in compliance with given analytical equation describing type of nonlinearity of nonlinear signals being generated; linear signal is, essentially sine-wave or pulsed signal.
 Reference wave shaper for coherent detection of relative 180° phase keyed signals / 2259005
Proposed reference wave shaper for coherent detection of 180 deg. relative phase keyed signals has frequency doubling unit, second harmonic filter, phase shifter, power amplifier, parametron, electronic switch, low-pass filter, and phase detector.
 Harmonic frequency multiplier / 2257665
Device has phase-inverse cascade, two-tact cascade, active elements of which at output are connected in parallel and connected to load, while source electrodes of active elements are connected to outputs of phase-inverse cascade and through source resistor to common point of device, while control electrodes of active elements through blocking capacitors are connected to common point of device.
Harmonic frequency multiplier / 2257665
Device has phase-inverse cascade, two-tact cascade, active elements of which at output are connected in parallel and connected to load, while source electrodes of active elements are connected to outputs of phase-inverse cascade and through source resistor to common point of device, while control electrodes of active elements through blocking capacitors are connected to common point of device.
Reference wave shaper for coherent detection of relative 180° phase keyed signals / 2259005
Proposed reference wave shaper for coherent detection of 180 deg. relative phase keyed signals has frequency doubling unit, second harmonic filter, phase shifter, power amplifier, parametron, electronic switch, low-pass filter, and phase detector.
Nonlinear signal generation method / 2262797
Proposed method involves conversion of linear signal into nonlinear one by parametric addition of linear signal with pumping signal and using them to act upon nonlinear formation created on the way of linear signal propagation in the form of man-made ionized formation or magnetic base plasma formation, parameters of linear and pumping signals being variable; linear signal and/or pumping signal is controlled by nonlinearity parameters of nonlinear formation in compliance with given analytical equation describing type of nonlinearity of nonlinear signals being generated; linear signal is, essentially sine-wave or pulsed signal.
Frequency divider / 2266609
Proposed frequency divider that can be used, for instance, as synchronized-wave source in radio transceiving, radio receiving, and electrical devices has inductance coil, semiconductor diode, capacitor, and bias voltage supply; in addition, it is also provided with newly introduced transistor whose collector and emitter are connected to respective unlike-polarity electrodes of semiconductor diode, communication inductance coil connected to transistor base and to common point of device and magnetically coupled with inductance coil, as well as loading resistor inserted between inductance coil and common point of device.
Frequency mixer / 2276452
Proposed frequency mixer that can be used for mixing and multiplying frequencies in radio and measuring equipment has nonlinear component built of three inductance coils, as well as nonlinear-magnetization superconductor core, both immersed in cryostat cooling agent.
 Digital computing synthesizer / 2286645
Digital computing synthesizer contains standard generator, delay block, digital accumulator, digital-analog converter, low frequencies filter, band filter, permanent memory block, divider with variable division coefficient, waiting multi-vibrator, two memory registers, reverse frequency counter, impulse generator, codes transformer and device for displaying frequency of output signal.
 Harmonic frequency multiplier / 2292629
Proposed harmonic frequency multiplier that can be used as wave supply in radio transmitters and radio receivers has harmonic input signal supply, input and output matching circuits, two varactors, four resistors, four capacitors, and two-pole bias voltage supply.
 Frequency divider / 2292630
Proposed frequency divided has transformer, capacitor, inductance coil, semiconductor diode, transistor, integrating circuit, and bias circuit incorporating series-connected bias voltage supply and resistor.
 Method for multiplying analog cosine oscillation frequency / 2310266
Proposed method for multiplying analog cosine oscillation frequency involves analog-to-digital conversion of analog cosine fixed-frequency oscillation , arc-cosine conversion of fixed-frequency digital signal, and analog-to-digital conversion of fixed-frequency digital signal; in addition, it includes analog-to-digital conversion of respective information signal in each of n newly introduced channels, generation of digital signal corresponding to fixed-frequency harmonic number which is added to respective converted information signal; total signal thus obtained is multiplied by converted fixed-frequency digital signal, and signal obtained upon multiplication is subjected to cosine and then digital-to-analog conversion.
 Harmonic frequency multiplier / 2324284
Device includes master generator, paraphase transformer with the first secondary winding and the second secondary winding connected in series, two semiconductor diodes, load resistor, two capacitors, amplifying stage with active element, which transfer characteristics is a branch of square parabola, three resistors, bias voltage source, and power supply source.
Digital signal synthesizer / 2250560
Proposed digital signal synthesizer has first and second delay circuits, low-pass filter, and three parallel channels, each incorporating pulse counter, memory unit, digital-to-analog converter, analog switch, analog adder, and delay circuit.
Digital signals synthesizer / 2257669
Device has standard support generator, delay block, first memory register, first digital accumulator, second digital accumulator, third digital accumulator, codes converter, analog-digital converter, low frequency filter, second memory register, divider with variable division coefficient, delay multi-vibrator.
Digital computing synthesizer / 2286645
Digital computing synthesizer contains standard generator, delay block, digital accumulator, digital-analog converter, low frequencies filter, band filter, permanent memory block, divider with variable division coefficient, waiting multi-vibrator, two memory registers, reverse frequency counter, impulse generator, codes transformer and device for displaying frequency of output signal.
 Digital quadrature-output computing synthesizer / 2294054
Proposed device has standard generator, delay unit, two memory registers, two digital storage devices, variable-ratio divider, two code converters, two digital-to-analog converters, two low-pass filters, and inverter.
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FIELD: computer engineering, possible use for synthesizing signals with V-shaped frequency modulation, possible use in radiolocation, navigation systems and adaptive communication systems. SUBSTANCE: digital computing synthesizer contains standard generator, delay block, digital accumulator, digital-analog converter, low frequencies filter, band filter, permanent memory block, divider with variable division coefficient, waiting multi-vibrator, two memory registers, reverse frequency counter, impulse generator, codes transformer and device for displaying frequency of output signal. EFFECT: provision of required frequency modulation rule for signal being synthesized. 2 dwg
The invention relates to electronic computing, designed for the synthesis of signals with a V-shaped frequency modulation and can be used to measure the frequency of the Doppler effect in radar, navigation systems and adaptive communication systems. Known digital frequency synthesizers containing a generator of clock pulses, the delay block, two blocks of constant memory, preset counters, two memory registers, two digital drive, the code Converter, digital to analog Converter, a low pass filter and pulse shaper [1]. The closest technical solution (prototype) to offer is a digital synthesizer with extended frequency range containing serially connected clock and the delay unit, connected in series block of continuous memory, preset counters, connected in series frequency counter, digital storage, digital to analog Converter, a low pass filter and two bandpass filter; standby multivibrator [2]. However, in the known frequency synthesizers there is no possibility to synthesize a signal with a V-shaped frequency modulation, which is used in radars for measuring Doppler frequency. The invention allows to extend the functionality the global opportunities of the digital synthesizer, and provides the required law of frequency modulation of the synthesized signal. Positive effect - the possibility of the synthesis signal with a V-shaped frequency modulation is achieved by the fact that in a digital frequency synthesizer with extended frequency range as a frequency counter used reversible counter with preset and put feedback via the pulse shaper to modify the invoice reversible counter. In digital computing synthesizer contains serially connected reference generator and the delay unit; sequentially connected digital drive, digital to analog Converter and a low pass filter, digital drive and a band-pass filter, the outputs of the filters are analog outputs of the synthesizer; a block of continuous memory divider with a variable division ratio of waiting multivibrator, the output of which is connected to the divider with a variable division ratio and to the digital drive; the outputs of the delay block is connected to a clock input of the divider with a variable division ratio, digital memory, digital to analog Converter, and the new is that in digital computing synthesizer introduced two memory register, reversible frequency counter, Faure, irovel pulses, connected in series code Converter and display device of the output signal; the input of the first memory register is the address input codes start frequencyiand the rate of change of frequency Dk; the output of the first memory register connected to the address input unit permanent memory, and the output of the second memory register to the input of the divider with a variable division ratio, the yield of the latter is connected to the counting input of the reversible counter, the output of the high-order bit of which is connected to the input of the shaper pulses, and the output of the pulse shaper is connected to the control input of the invoice of the frequency counter. In figure 1 the block diagram of digital computer synthesizer, figure 2 - diagram of the operation of the device and schedule changes the output frequency of the synthesizer. Digital synthesizer (figure 1) contains the first and second memory registers 1 and 8, block of continuous memory 2, the reversing frequency counter 3, the digital drive 4, d / a Converter 5, the low pass filter 6, a band-pass filter 7, a divider with a variable division ratio of 9, the pulse shaper 10, the code Converter 11, the display device information 12 waiting multivibrator 13, the reference (reference) generator 14, the delay unit 15. Digital synthesizer contains serially connected two memory register 1 and 8; serially connected first memory register 1, block permanent memory 2, the reversing frequency counter with preset 3, the digital drive 4, d / a Converter 5, the output of which is connected to the low pass filter 6 and the bandpass filter 7, and the outputs of the filters are analog synthesizer outputs; the output of the second memory register 8 is connected to the input of the divider with a variable division ratio of 9, the yield of the latter is connected to the counting input of the reversible counter 3, the high order bit of which is connected to the input of the pulse shaper 10, the yield of the latter is connected to the input of changing the direction of the reversible account of the frequency counter 3, the output of which is connected to the input of the code Converter 11, the output of the latter is connected to the display device information 12; standby multivibrator, the input of which is the input of the start uZap(t), a output is connected simultaneously to the inputs of the reset of the frequency counter 3, the digital drive 4, a divider with a variable division ratio of 9; connected in series reference generator 14 and the delay unit 15, the outputs of which are connected to the clock inputs of the divider with a variable division ratio of 9, the digital drive 4 and d / a Converter 5. Digital synthesizer following the m way. The reference generator 14 outputs a signal reference frequency sine wave which is fed to the input of the delay unit 15 forming spaced in time sequence of rectangular pulses of the form "meander", received at the clock inputs of the divider with a variable division ratio of 9, the digital drive 4, d / a Converter 5, and serve to synchronize the operation of the synthesizer. From the management computer is an entry in the registers of the memory 1 address code start frequencyiand in the memory register 8 division ratio of Dkdivider with a variable division ratio of 9. Let at time t0(figa) comes triggering pulse uZap(t) to the input standby multivibrator 3 which generates a pulse setup uy(t) (figb), according to which the first code entry address of the starting frequencyiand code division ratio of Dkrecorded from the divider with a variable division ratio of 9, then at time t1code start frequencyirecorded in the reversible counter with preset 3, and the code Dkfrom memory register 8 - in divider with a variable division ratio of 9. Then with each subsequent clock pulse at the output of the reversible counter frequency 3 code frequency will change according to the formula (pigv):
where T=1, 2, 3, 4,... - the number of the clock pulse. As soon as the high order bit of the frequency counter becomes equal to "1" (figure 2 d), the pulse shaper 10 will switch the counting direction of the reversible counter 3, and the code signal frequency synthesizer will be described by the formula:
where Cjcode the final value of the frequency counter 3. Then the frequency of the signal will vary according to the schedule presented on Figg. On the digital outputs of the drive 4 code amount will change as follows:
If we assume that f0=Ci/2π - initial frequency, 0.5f'=1/Dk- the rate of change of frequency, Δt=T, the phase of the signal will vary according to the formula:
Output digital-to-analog Converter is formed by an analog signal "triangular" shape, the spectrum of which contains a large number of harmonics of higher orders. Output digital-to-analogue Converter 5 analog signal is supplied to the lowpass filter 6, which transmits the output of the synthesizer only the first harmonic of the synthesized signal, the amplitude of which will vary according to the formula:
where Umthe amplitude of the signal. And the output of the band pass filter 7, PR is starting the third harmonic of the synthesized signal, the signal amplitude will vary according to the formula:
Once at the entrance waiting multivibrator 13 will be the next triggering pulse tรง2(figure 2), will install code start frequencyiand the direction of the account again becomes positive. Thus in the synthesizer signal is formed with a V-shaped frequency modulation, which is used in radar systems for measuring Doppler frequency. Literature 1. Patent No. 2058659 of the Russian Federation, MKI N 03 In 19/00, the Digital frequency synthesizer/Ryabov I., fishchenko P.A. - Appl. 23.09.1993. Publ. 20.04.1996. Bulletin no.11. 2. Patent No. 2227366 of the Russian Federation, MKI H 03 L 7/18, Digital frequency synthesizer with extended frequency range/Ryabov I. - Appl. 06.05.2002. Publ. 20.04.2004. Bull. No. 11 (Prototype). Digital synthesizer containing serially connected reference generator and the delay unit, connected in series digital storage, digital to analog Converter and a low pass filter, bandpass filter, block of continuous memory divider with a variable division ratio of waiting multivibrator, the output of which is connected to the inputs of the reset of the divider with a variable division ratio, and a digital memory, and the outputs of the delay block is connected to a clock input of the divider with ereminym division factor, digital memory and digital to analogue Converter, the input of the bandpass filter connected to the output of the digital to analogue Converter, the input standby multivibrator is input run digital synthesizer, and the outputs of the low pass filter and bandpass filter are analog outputs digital computer synthesizer, characterized in that the introduction of two series-connected memory register, reversible frequency counter, pulse shaper; connected in series code Converter and display device of the output signal; the input of the first memory register is the address input codes start frequencyiand the rate of change of frequency Dk; the output of the first memory register connected to the address input unit permanent memory, and the output of the second memory register to the input of the divider with a variable division ratio, the yield of the latter is connected to the counting input of the reversible counter frequency, the output of which is connected to the digital inputs of the drive and the code Converter, and the output of the high-order digit reversible counter frequency connected to the input of the pulse shaper, the output of which is connected to the control input of the counting direction of the reversible counter frequency input reset which is connected with vyhoda the standby multivibrator.
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