Digital synthesiser for generating multi-frequency telegraphy signals |
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IPC classes for russian patent Digital synthesiser for generating multi-frequency telegraphy signals (RU 2536385):
  
 Frequency agile digital computational synthesiser / 2491710
Digital computational synthesiser has a reference generator 1 and a formation and delay unit 2, a first memory register 3, a first counter 4, a code multiplier 5, a digital storage 6, a code converter 7, a digital-to-analogue converter (DAC) 8, a low-pass filter 9, the output of which is the analogue output of the digital computational synthesiser; a second memory register 10, a second counter 11, a third memory register 12, a variable-ratio divider 13; inputs of the first, second and third memory registers are the digital inputs of the digital computational synthesiser.
 Method and device for dynamic scaling of frequency of frequency automatic adjustment scheme for microprocessors / 2461961
Frequency automatic adjustment scheme contains many generator complexes designed for output signal generation, control circuit configured for selective feeding of output signal of the first generator complex from multiple generator complexes to the output of timing signal and changing of "rough" output frequency of the first generator complex from the first range of "rough" frequencies to the second range of "rough" frequencies when synchronisation from feedback line is stopped as a response that necessary operating frequency of output signals is within the second range of "rough" frequencies, note that "rough" output frequency of the first generator complex remains fed to the output of timing signal; switching device configured for selective connection of the first generator complex with feedback line, note that when control circuit sets the output signal of the first generator complex to the timing signal output synchronised and non-synchronised output signals are received correspondingly, when the first generator complex through switching device is connected to feedback line or when switching device disconnects the first generator complex from feedback line.
 Code frame synchronisation method / 2450436
Code frame synchronisation method involves multiplication of a received input sequence consisting of several successive words by a noise-immune cyclic code verification polynomial and by a numerating sequence verification polynomial. Each word is a bitwise modulo 2 sum of the noise-immune cyclic code, a synchronising sequence and the numerating sequence. As a result, a synchronising sequence and noise-immune cyclic code syndrome sum is obtained, from which possible error vectors of the noise-immune cyclic code are determined beyond its error-correcting capability. The number of the numerating sequence is then determined, from which the possible end of the message block is determined for a threshold number of numbers. Each signal on the end of the message block is further checked for conformity with the true signal on the end of the message block through a message block decoding procedure and if the decoding result is positive, a final decision is made on code frame synchronisation of the message block.
 Synthesizer of frequency-modulated signals / 2449462
Synthesizer of frequency-modulated signals comprises a phase detector, a low pass filter, a controlled generator, a divider with an alternating division ratio (DADR), a reference generator, a divider with a fixed division ratio (DFDR), an information source, M (M>1) generators of sine and cosine components of manipulation frequencies, M scale amplifiers for sine outputs and M scale amplifiers for cosine outputs, the first and second switchboards, a controlled phase inverter, the first and second multipliers, a control unit, a summator, a quadrature signal shaper.
 Digital frequency synthesiser / 2440668
Result is achieved due to introduction to digital frequency synthesiser of buffer amplifier-pulse shaper (31), the first counter-divider (32), the second counter-divider (33), the main counter-divider (34) and additional counter-divider (35).
 Frequency synthesiser / 2423784
Frequency synthesiser, having a control unit, a first intermediate frequency synthesiser, a second intermediate frequency synthesiser, characterised by that it has a second intermediate frequency phase-locked-loop frequency control (PLLFC) synthesiser, which synthesises a fixed reference frequency, a DDS synthesiser with frequency tuned in the given range, a low-pass filter of the DDS synthesiser, a mixer of the PLLFC synthesiser reference frequency and a DDS synthesiser, whose output frequency is equal to the sum of the reference frequency of the PLLFC synthesiser and frequency of the DDS synthesiser, a band-pass filter for filtering the output frequency of the mixer.
 Digital frequency synthesiser / 2416158
Digital frequency synthesiser has a reference generator, two dividers with fixed division factor, an inverting adder, an inverter, two dividers with variable division factor, three low-pass filters, two controlled generators, two frequency-phase detectors and a microcontroller, as well as a digital potentiometer (31), and a voltage follower (32), a synchronism indicator (33), a switch (34), a first (35) and a second (36) voltage comparator.
 Synthesiser with v-shaped frequency modulation law / 2407144
Synthesiser with V-shaped frequency modulation law includes generator of clock pulses (1), reversible counter (2), digital-to-analogue converter (DAC) (3), generator controlled with voltage (GCV) (4), comparison circuit of codes (5), constant storage unit (ROM) (6), the first frequency divider (7), phase discriminator (PD) (8), the frequency divider (9), digital computation synthesiser (DCS) (10).
 Frequency synthesiser / 2394367
Frequency synthesiser includes two frequency phase detectors, two low-pass filters, voltage-controlled generator, two dividers with variable division factor, buffer cascade, two synchronism indicators, coincidence circuit, D flip-flop, shaper of control signal and amplifier with controlled amplification factor, two-mode self-oscillator, control unit, key, switch from two directions, storage unit and signal source of reference frequency.
 Digital synthesiser of frequency and phase modulated signals / 2358384
Present invention pertains to electronics and computer technology, meant for synthesising frequency and phase modulated signals and can be used in radar, navigation and adaptive communication systems. The digital synthesiser of frequency modulated and phase modulated signals contains a reference generator, delay unit, first memory register, first digital accumulator, second memory register, second digital accumulator, adder, code converter, digital-to-analogue converter, low pass filter, third memory register, frequency divider with varying division factor, fourth memory register and a third digital accumulator.
 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.
 Frequency synthesizer / 2329594
Invention is referred to radio communication and may be used in radio receiving and radio transmitting devices for radio signal generation, modulation and frequency conversion. Synthesizer includes signal source of reference frequency, two frequency and phase detectors, control unit, two dividers with variable division factor, two low-frequency filters, voltage controlled generator, buffer amplifier, storage unit, switch from two directions, two-mode auto generator, alignment plug and temporary interval unit.
 Frequency synthesizer / 2329595
Invention is referred to radio communication and may be used in radio receiving and radio transmitting devices for radio signal generation, modulation and frequency conversion. Synthesizer includes signal source of reference frequency, frequency and phase detector, control unit, divider with variable division factor, two low-frequency filters, voltage controlled generator, direct current amplifier, interfacing circuit, two-mode auto generator.
 Frequency synthesizer with acoustic circuit of adaptive frequency and phase auto tuning / 2329596
Invention may be used for generation of stable frequency network with even interval in receiving and transmitting devices and is notable for short tuning time within broad range of operating frequencies. Device includes controlled generator, frequency divider with variable division factor, frequency and phase detector, reference generator, frequency divider with fixed division factor, controlled charging unit, trapping-by-phase rating unit, microcontroller, trapping-by-frequency rating unit and low-frequency filter consisting of two capacitors, two resistors and two switches.
 Time-and-frequency synchronisation device / 2341892
Proposed device comprises a reference generator, two variable-ratio dividers, a phase detector, control generator, two digital-to-analogue converters, computer, mode selection unit, device for determining temporary position of the input pulse, index zone generator and a frequency divider.
Digital synthesiser of frequency and phase modulated signals / 2358384
Present invention pertains to electronics and computer technology, meant for synthesising frequency and phase modulated signals and can be used in radar, navigation and adaptive communication systems. The digital synthesiser of frequency modulated and phase modulated signals contains a reference generator, delay unit, first memory register, first digital accumulator, second memory register, second digital accumulator, adder, code converter, digital-to-analogue converter, low pass filter, third memory register, frequency divider with varying division factor, fourth memory register and a third digital accumulator.
Frequency synthesiser / 2394367
Frequency synthesiser includes two frequency phase detectors, two low-pass filters, voltage-controlled generator, two dividers with variable division factor, buffer cascade, two synchronism indicators, coincidence circuit, D flip-flop, shaper of control signal and amplifier with controlled amplification factor, two-mode self-oscillator, control unit, key, switch from two directions, storage unit and signal source of reference frequency.
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FIELD: physics, computer engineering. SUBSTANCE: invention relates to electronic-computer engineering and radio engineering and is intended for synthesis of multi-frequency telegraphy signals and can be used in modern adaptive communication systems. The digital synthesiser for generating multi-frequency telegraphy signals comprises a first memory register 1, a second memory register 2, an adder 3, a digital storage 4, a code converter 5, a digital-to-analogue converter (DAC) 6, a low-pass filter 7, a reference generator 8 and a formation and delay unit 9. EFFECT: generation of multi-frequency telegraphy signals and faster operation. 1 dwg
The invention relates to electronic computing and engineering is intended for the synthesis of multi-frequency signals telegraphy and can be used in modern adaptive communication systems. Known digital frequency synthesizers containing a generator of clock pulses, the delay block, the first and second memory registers, preset counters, the first and second blocks of constant memory, DAC, LPF, the first and second digital drives [1]. The closest technical solution (prototype) is a digital frequency synthesizer that contains the reference generator and the delay unit; a shift register, digital, drive, functional Converter code-sine, digital to analog Converter (DAC), a lowpass filter (LPF) [2]. Positive technical result - the formation of multi-frequency signals telegraphy and improve performance is achieved by the fact that in a digital synthesizer for generating signals multi-frequency telegraphy containing serially connected reference generator and the power generation and delay; the first memory register; serial connected digital drive, the code Converter, digital to analog Converter and a low pass filter whose output is an analog output digital is integator, and his first digital input is the input of the first memory register; the outputs of the shaping unit and the delay is connected to the clock inputs of the digital memory and digital to analog Converter, respectively, what is new is that the second memory register and the adder; the output of the second memory register connected to the second input of the adder; the output of the first memory register connected to the first input of the adder, and the output of the adder connected to the input of the digital memory; a second memory register is the second digital input digital synthesizer. Digital synthesizer for generating signals multi-frequency telegraphy contains the first memory register 1, the second register memory 2, the adder 3, the digital drive 4, the code Converter 5, a digital-to-analogue Converter (DAC) 6, low pass filter (LPF) 7 whose output is an analog output of the digital synthesizer; reference generator 8 and the forming unit and delay 9; first and second digital inputs digital synthesizer are informational inputs of the first and second memory registers 1 and 2, respectively. Digital synthesizer operates as follows. The information input of the first memory register 1 enters A codeisimultaneously to the input of the second memory register 2 receives the code Bj. These codes are formed in which amatore 3 and the code With
to determine the initial frequency of the synthesized signal. Reference generator 8 generates a sinusoidal signal of a reference frequency, from which the shaping unit and delay 9 are formed heartbeats form "meander", spaced in time and are used to synchronize the operation of the digital memory 4 and d / a Converter 6. With the arrival of the first clock pulse code is loaded into the digital drive 4, the summation of which will vary according to the formula
Code amount S is supplied to the code Converter 5, which of the code's generates sin(S), coming to the information inputs of the DAC 6, which is formed by a stepped sinusoidal signal of the form defined by the code C. the low pass Filter 7 passes to output only the first harmonic of the generated signal. If we assume that ω0=C=Ai+Bj- initial frequency of the synthesized signal, Δt=T - duration of the clock interval, the output low-pass filter 7 is formed by the signal described by the formula:
where Umthe amplitude of the signal. The frequency of the synthesized signal ω0will be determined codes Aiand Bjarriving at the inputs of the first and second memory registers 1 and 2, which is the fast digital inputs digital synthesizer. Therefore, changing codes Aiand Bjyou can control the digital frequency synthesizer to generate signals multi-frequency telegraphy. Speed adjustment of the frequency of the generated signal will not exceed one clock interval, so the performance of this digital synthesizer higher compared to the prototype. Literature 1. RF patent №2058659. IPC NV 19/00. Digital frequency synthesizer / Ryabov, I. C., fishchenko P. A. Appl. 23.09.1993. Publ. 20.04.1996. Bull. No. 11. - 4 S. 2. Patent No. 2452085 Russian Federation IPC H03L 7/00. Digital synthesizer for multi-frequency telegraphy/ Ryabov, I. C., Grandfathers, A. N., Yuriev P. M., Ryabov S. A., Tolmachev, S. C. Appl. 07.07.2011. Publ. 27.05.2012. Bull. No. 15. 4 C. (prototype). Digital synthesizer for generating signals multi-frequency telegraphy containing serially connected reference generator and the power generation and delay; the first memory register; serial connected digital drive, the code Converter, digital to analog Converter and a low pass filter whose output is an analog output of the digital synthesizer, and his first digital input is the input of the first memory register; the outputs of the shaping unit and the delay is connected to the clock inputs of the digital memory and digital to analog Converter, respectively, to distinguish the different topics that introduced a second memory register and the adder; the output of the second memory register connected to the second input of the adder; the output of the first memory register connected to the first input of the adder, and the output of the adder connected to the input of the digital memory; a second memory register is the second digital input digital synthesizer.
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