Triangular waveform generator

FIELD: radio engineering, communication.

SUBSTANCE: triangular waveform generator contains a controlled source of quadrature harmonic signals, the first, the second and the third calculators of the module, the first and the second adders.

EFFECT: increasing the reliability with changing frequency and amplitude of the generated signal within wide limits.

3 dwg

 



 

Same patents:

FIELD: radio engineering, communication.

SUBSTANCE: triangular signal former comprises first and second modulus computers, a multiplier, a summation unit, a subtractor and an adder.

EFFECT: maintaining high linearity of the formed triangular signal with variation of frequency of the input source of harmonic oscillations in a wide range.

5 dwg

The invention relates to a pulse technique for scanners, analog-to-digital converters, pulse-width modulators, devices controlled delay

The invention relates to the field of instrumentation and automation for forming a saw tooth voltage scanners, analog-to-digital converters, pulse-width modulators, devices controlled delay

Function generator // 2555241

FIELD: radio engineering, communication.

SUBSTANCE: function generator includes a bipolar pulse generator, first and second short pulse generators, an inverter, first and second controlled integrators, a comparison circuit, a driver, a harmonic signal source and a comparator.

EFFECT: broader functional capabilities by obtaining at the outputs, along with a harmonic signal, triangular waveforms and bipolar rectangular waveforms, amplitude values of which remain stable when the frequency and amplitude of the original signal change.

4 cl, 2 dwg

Function generator // 2554571

FIELD: electricity.

SUBSTANCE: function generator contains the harmonic signal source, the first and the second comparators, the first and the second univibrators, the first and second sampling and storage devices, the first and the second dividers, the first and the second adders, the inverter, the buffer cascade, the first and the second controllable integrators, the third univibrator, the first and the second reference voltage sources.

EFFECT: expansion of functionality by obtaining on its outputs along with the harmonic signal of triangular signals and squared bipolar signals the amplitude values of which remain stable at change of input signal frequency and amplitude.

3 dwg

FIELD: radio engineering, communication.

SUBSTANCE: quadrature harmonic signal generator includes a harmonic signal source, two phase changers, two comparators, two univibrators, two sampling-storage devices, a divider, a multiplier, an adder, the output of which is connected to the second output of the quadrature harmonic signal generator, the first output of which is connected to the inputs of the first and second phase changers, two resistors, a capacitor, an operational amplifier and a scaling amplifier, wherein the harmonic signal source is connected between the input of the second phase changer and a common bus.

EFFECT: synchronising output signals with the phase of the input signal, the amplitude and frequency of which may vary in a wide range.

2 dwg

FIELD: radio engineering, communication.

SUBSTANCE: three-phase harmonic signal generator includes two resistors, two capacitors, two repeaters, two comparators, two univibrators, two sampling-storage devices, a divider, a scaling amplifier, an inverter, two controlled phase changers, wherein the inverter is connected between the input bus and the first input of the first controlled phase changer, the output of which is connected to the second output of the three-phase harmonic signal generator, the first output of which is connected to the input bus and the first input of the second controlled phase changer, the output of which is connected to the third output of the three-phase harmonic signal generator.

EFFECT: generating three-phase harmonic signals with stable shifting thereof during variation of frequency and amplitude of the input signal in a wide range.

2 cl, 2 dwg

FIELD: radio engineering, communication.

SUBSTANCE: device comprises two multipliers, two integrators, two squaring devices, two adders, an inverter, two dividers, a square-root extracting unit, a comparator and a reference voltage source.

EFFECT: high spectral purity of generated quadrature harmonic signals.

3 dwg

FIELD: electrical engineering.

SUBSTANCE: proposed device comprises closed circuit composed by uneven number of inverting cascades. Each of the latter has first signal input connected to output of prior cascade and second signal input. Total quantity of cascades us selected to be multiple of three. Note here that every ith cascade is composed by phase interpolation controlled element. The latter incorporates second signal input connected to output of (i-3)th cascade. Control inputs of all phase interpolation elements are connected with common terminal of control voltage.

EFFECT: expanded range of retuning of generated pulse frequency.

3 cl, 3 dwg

Function generator // 2541147

FIELD: radio engineering, communication.

SUBSTANCE: function generator comprises a comparator circuit, a multiplier, a first adder, first and second controlled integrators, an inverter, a relay element, first and second squaring devices, a second adder, a square-root computer and a triangular waveform generator.

EFFECT: broader functional capabilities and maintaining high linearity of a triangular waveform with variation of the amplitude of quadrature harmonic signals in a wide range.

2 cl, 4 dwg

Function generator // 2534939

FIELD: radio, communication.

SUBSTANCE: function generator comprises the source of quadrature signals, the first and second calculators of modules, the first and second quadrators, the adder, the generator of bipolar square-wave signals, the first and second subtracters, the amplitude calculator and the divisor.

EFFECT: providing operability in change in wide range of amplitude of quadrature signals.

2 cl, 3 dwg

FIELD: radio engineering, communication.

SUBSTANCE: invention relates to radio engineering and communication and can be used in designing controlled generators. The controlled generator has two multipliers, two integrators, a nonlinear element and an adder, wherein the output of the first integrator is connected to the first input of the second multiplier, the input of the nonlinear element and the first output of the controlled generator, the output of the second integrator is connected to the second output of the controlled generator and the second input of the adder, the output of which is connected to the first input of the first multiplier, the second input of which is connected to the control bus of the controlled generator and the second input of the second multiplier, wherein outputs of the first and second multipliers are respectively connected to inputs of the first and second integrators, as well as a control unit, the first and second inputs of which are respectively connected to the first and second outputs of the controlled generator, the third input of the control unit is connected to a reference voltage bus, and the fourth input is connected to the output of the nonlinear element, wherein the output of the control unit is connected to the first input of the adder.

EFFECT: reduced nonlinear distortions and asymmetry of output signals.

3 cl, 11 dwg

FIELD: radio engineering, communications.

SUBSTANCE: octave microconsuming high-frequency voltage-controlled generator comprises four P-channel transistors, four N - channel transistors. Links between transistors provide for a self-excitation mode, and non-linearity of feedback depending on control voltages provides for expansion of generated frequencies range to one octave.

EFFECT: maintenance of a permanent output signal amplitude, close to symmetrical one, increased noise immunity.

6 dwg

FIELD: electrical engineering; generation of electric waves affording several output signals.

SUBSTANCE: proposed device that can be used for shaping two- or three-phase signal for setting ac drive current or voltage, as well as for other industries where two- or three-phase adjustable-frequency voltages or currents of strictly sine waveform precisely shifted in phase through 90 or 120 deg. are required and provision is to be incorporated for varying phase sequence is available of two design alternates, one for shaping two-phase harmonic signal and other one, for shaping three-phase harmonic signal. Both alternatives are capable of shaping additional sine-wave output signals for controlling current direction to provide for vector control of electric drive and also continuous cyclic shaping of harmonic-signal period without distortion of its waveform, as well as for synchronizing all output signals with supply mains voltage. Device of first design alternate meant for shaping two-phase harmonic signal has control unit 1, variable-frequency oscillator 2, counter 3, digital units 11, 12 used for shaping trigonometric functions, unit 13 of voltage control signal coordinate converters, unit 14 of current direction control signal coordinate converters, desired voltage computing unit 9, desired current computing unit 10, motor speed computing unit 5, absolute slip parameter computing unit 6, selector switch 7, supply mains voltage synchronizing unit 4, absolute slip parameter shaping unit 8, and relevant connections.

EFFECT: enlarged functional capabilities.

4 cl, 4 dwg

FIELD: electricity.

SUBSTANCE: double-channel generator of harmonic signals comprises two channels, every of which comprises driving oscillator, preliminary amplifier, isolating transformer, power amplifier and output transformer, and also two matching devices, two analogue-digital converters and microprocessor.

EFFECT: reduced effect of phase and amplitude non-identity with summation of output signals of both channels of generator.

1 dwg

FIELD: radio engineering.

SUBSTANCE: ring CMOS voltage controlled oscillator (VCO) contains N differential inverters with two inputs and two outputs, connected in such a way that negative direct current feedback in the ring is provided; each differential inverter contains two active inverting n-channel transistors, three p-channel transistors on the gates of which one principal and two minor control voltages are applied. Minor voltages are generated from the principal voltage by means of two additional circuits consisting of pair of p-channel and pair of n-channel transistors.

EFFECT: higher linearity of modulation lasing, extension of bandwidth with four times frequency overlapping.

3 cl, 12 dwg

FIELD: radio engineering, communications.

SUBSTANCE: two-phase LC-generator of quadrature harmonic oscillations comprises a parallel oscillating LC-circuit, a double-cascade non-inverting active amplifying broadband element, the first cascade of which shall have larger input resistance, and the second cascade shall have larger output resistance, serially with an inductance coil L in the circuit there is a resistive element with low resistance or its equivalent, to which the input of the additional broadband amplifier is connected, at the output of which harmonic oscillations are produced, which are quadrature relative to harmonic oscillations at the output of the first cascade of the active element.

EFFECT: development of an LC-generator of two quadrature oscillations with a fixed phase shift, not varying in process of frequency tuning of generated oscillations.

2 cl, 1 dwg

FIELD: radio engineering, communications.

SUBSTANCE: octave microconsuming high-frequency voltage-controlled generator comprises four P-channel transistors, four N - channel transistors. Links between transistors provide for a self-excitation mode, and non-linearity of feedback depending on control voltages provides for expansion of generated frequencies range to one octave.

EFFECT: maintenance of a permanent output signal amplitude, close to symmetrical one, increased noise immunity.

6 dwg

FIELD: radio engineering, communication.

SUBSTANCE: invention relates to radio engineering and communication and can be used in designing controlled generators. The controlled generator has two multipliers, two integrators, a nonlinear element and an adder, wherein the output of the first integrator is connected to the first input of the second multiplier, the input of the nonlinear element and the first output of the controlled generator, the output of the second integrator is connected to the second output of the controlled generator and the second input of the adder, the output of which is connected to the first input of the first multiplier, the second input of which is connected to the control bus of the controlled generator and the second input of the second multiplier, wherein outputs of the first and second multipliers are respectively connected to inputs of the first and second integrators, as well as a control unit, the first and second inputs of which are respectively connected to the first and second outputs of the controlled generator, the third input of the control unit is connected to a reference voltage bus, and the fourth input is connected to the output of the nonlinear element, wherein the output of the control unit is connected to the first input of the adder.

EFFECT: reduced nonlinear distortions and asymmetry of output signals.

3 cl, 11 dwg

Function generator // 2534939

FIELD: radio, communication.

SUBSTANCE: function generator comprises the source of quadrature signals, the first and second calculators of modules, the first and second quadrators, the adder, the generator of bipolar square-wave signals, the first and second subtracters, the amplitude calculator and the divisor.

EFFECT: providing operability in change in wide range of amplitude of quadrature signals.

2 cl, 3 dwg

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