Synthesiser with v-shaped frequency modulation law |
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IPC classes for russian patent Synthesiser with v-shaped frequency modulation law (RU 2407144):
 
 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.
 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.
 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.
 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 / 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.
 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.
 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 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.
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: radio engineering. SUBSTANCE: 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). EFFECT: enlarging the frequency range of synthesised signals and increasing quick action. 1 dwg
The invention relates to electronic computing and engineering is intended for the synthesis of signals with frequency modulation and can be used in radar, navigation, adaptive communication systems and allows to synthesize the signal V-neck-law frequency modulation. Known digital frequency synthesizers frequency-modulated signal containing the reference generator, the delay block, the block of continuous memory, register memory, the divider with a variable division ratio, digital drive, the code Converter, d / a Converter, low pass filter, waiting multivibrator, and a reversible counter and a comparison circuit [1]. Also known digital computer synthesizer with quadrature outputs containing the reference generator, the delay unit, two memory registers, two digital drive, a divider with a variable division ratio, two transducer codes, two digital to analogue Converter, two lowpass filter [2]. The closest technical solution (prototype) is a frequency synthesizer based VCO with phase locked loop containing a voltage controlled oscillator, two frequency divider, a phase discriminator and a reference generator [4]. However, the known digital synthesizers have low would tradesystem and a relatively narrow range of synthesized frequencies. The invention allows to extend the frequency range of the synthesized signals and improve the performance of synthesizers. The positive effect of the extension of the frequency range of the synthesized signal and the speed of sound is due to the fact that the synthesizer V-neck-law frequency modulation, containing serially connected clock, digital synthesizer, a second frequency divider, a phase discriminator; connected in series a voltage controlled oscillator, a first frequency divider, a phase discriminator, the output of which is connected to the first control input of the generator is controlled by the voltage, and the output of the latter is the output of the synthesizer V-neck-law frequency modulation, and the new is what is entered serially concatenated block of continuous memory, comparison circuit codes, reversible counter, a digital to analog Converter whose output is connected to the second control input of the generator is controlled by the voltage; the output of the reversible counter connected to the second input of the comparison circuit codes, the generator output clock pulses is connected to the clock input of a reversible counter, and the address input unit constant memory is a digital input of the synthesizer V-neck is the law of the modulation frequency. The drawing shows a block diagram of the synthesizer V-neck-law frequency modulation. Synthesizer V-neck-law frequency modulation comprises a generator of clock pulses 1, the reversible counter 2, a digital-to-analogue Converter (DAC) 3, a voltage controlled oscillator (VCO) 4, the comparison circuit codes 5, block permanent memory (ROM) 6, a first frequency divider 7, a phase discriminator (PD) 8, a second frequency divider 9, digital synthesizer (TACs) 10. The frequency synthesizer operates as follows. The address input of the ROM 6 enters code Aithat in the comparison circuit codes 5 is compared with the code Q output of reversible counter 2 and if Q<Aithe counter 2 is switched to account for the increase. Code Q output of counter 2 is supplied to the DAC 3, the voltage output of which is supplied to the second control input of the VCO 4. Increase code Q leads to an increase in voltage at the DAC 3, which increases the VCO frequency synthesized signal. Clock 1 is used for clocking digital synthesizer 10 and up / down counters 2. The output signal from the VCO 4 passes through the first frequency divider 7, and is supplied to the first input of the phase discriminator 8, the other input of which is fed the signal from the digital computer synthesizer 10 through the second cases the tel frequency 9. The output of the phase discriminator 8 is formed by a control voltage proportional to the error signal, which is supplied to the first control input of the VCO 4. Next to the address input of the ROM 6 enters code Bjdetermining the final value of the frequency synthesizer, which is fed to the input of the comparison circuit codes 5. Provided that Q>Bjswitch mode account reversible counter 2 to decrease. In accordance with this DAC output 3 is formed by the control voltage, which will determine the frequency of the VCO 4. At the output of the VCO 4, the frequency synthesized signal fGONGwill be proportional to the code Q reverse counter 2. The output frequency of the VCO is determined by the following formula:
Next, the code Q output of the counter 2 starts to decrease until conditions Q<Ai, after which the counting direction of the counter 2 will again become positive. Thus, at the output of the synthesizer V-neck-law frequency modulation is formed of a frequency-modulated signal, the amplitude of which changes according to the formula:
where f' is the rate of change of frequency; fGONG- the initial frequency of the VCO. Literature 1. Patent No. 2204197 of the Russian Federation, IPC H03L 7/18, Digital synthesizer frequency-modulated signals. / Ryabov I. Ryabov,V. - Appl. 06.04.2001. Publ. 10.05.2003. Bull. No. 13. 2. Patent No. 2294054 of the Russian Federation, IPC H03L 7/18, Digital synthesizer with quadrature outputs. / Ryabov I. - Appl. 25.10.2005. Publ. 20.02.2007. Bull. No. 5. 3. Ryabov IV Digital synthesis precision of signals. Monograph / Everybo: Yoshkar-Ola: Marstu, 2005. 152 C. 4. The formation precision of the frequencies and signals: Textbook. manual / Nperrin, Was, Evivanov, Ebelmen; N. Novgorod: Nizhny Novgorod. state technology. University, 2003. Synthesizer V-neck-law frequency modulation, containing serially connected clock, digital synthesizer, a second frequency divider, the first input of the phase discriminator; connected in series a voltage controlled oscillator, a first frequency divider, a second input of the phase discriminator, the output of which is connected to the first control input of the generator is controlled by the voltage, and the output of the latter is the output of the synthesizer V-neck-law frequency modulation, characterized in that the input serially concatenated block of continuous memory, a comparison circuit codes, reversible counter, a digital to analog Converter whose output is connected to the second control input of the generator voltage-controlled; the output of the reversible counter connected to the second I shall do the comparison circuit codes the generator output clock pulses is connected to the clock input of a reversible counter, and the address input unit constant memory is a digital input of the synthesizer V-neck-law frequency modulation.
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