30 results about "Phased logic" patented technology

A cost-effective continuous phase logic-based modulator and demodulator are provided to allow communications using binary frequency shift keying (BFSK) as well as M-ary FSK techniques. The modulator of the 1-bit precision modem architecture is based on a 1-bit precision numerically controlled oscillator (NCO), which provides complete programmability with respect to a frequency of the 1-bit precision logic-based modulator and/or demodulator. The 1-bit precision NCO includes an adder and a phase accumulator register which is clocked by a master clock signal. A two-input multiplexer has a single bit symbol value to generate BFSK, or larger input multiplexers can be implemented to provide M-ary FSK. The output of the 1-bit precision NCO is upconverted to an intermediate frequency using a simple logic function, i.e., XNOR logic. Alternatively, the intermediate frequency may be arrived at without the need for upconversion by directly utilizing a harmonic alias at a desired IF frequency. The undesirable portion of the upconverted signal may be suppressed using I/Q image rejection, and/or an appropriate bandpass filter may be used. A band limited, hard limited signal at the high IF is presented to the 1-bit precision demodulator as a receive IF signal, which is treated as a 1-bit quantization of the signal. The receive IF signal is digitally down-converted to a low IF signal to produce an alias signal at the low IF frequency.

Circuitry for controlling motors, such as a brushless motor (BLM), is disclosed. The circuitry may comprise one or more inputs for receiving rotor position signals from one or more Hall effect sensors that detect the position of, for example, a BLM rotor. The circuitry may also comprise an input for receiving a pulse width modulated speed control signal. The circuitry generates one or more drive signals, each of which may comprise a logical combination (e.g., a logical AND combination) of the speed control signal and a rotor position signal, for controlling power switches that are coupled to electromagnets of the BLM.

A logic device for use with data signals having a continuously or semi-continuously varying waveform of substantially fixed frequency. The device provides a logical output from at least one of the data inputs and comprising a first pair of inputs each to receive a data signal having one of a predetermined set of values representing analog, discrete, or digital states. A combiner stage is used to combine the inputs and produce a signal therefrom. A filter stage is utilized to receive the signal and produce a conditioned signal representative of one of a pair of binary states. The conditioned signal is combined with a second control input. The resultant signal is passed to an output.

A cost-effective continuous phase logic-based modulator and demodulator are provided to allow communications using binary frequency shift keying (BFSK) as well as M-ary FSK techniques. The modulator of the 1-bit precision modem architecture is based on a 1-bit precision numerically controlled oscillator (NCO), which provides complete programmability with respect to a frequency of the 1-bit precision logic-based modulator and/or demodulator. The output of the 1-bit precision NCO is upconverted to an intermediate frequency using a simple logic function, i.e., XNOR logic. The undesirable portion of the upconverted signal may be suppressed using I/Q image rejection, and/or an appropriate bandpass filter may be used. A band limited, hard limited signal at the high IF is presented to the 1-bit precision demodulator as a receive IF signal, which is treated as a 1-bit quantization of the signal. The receive IF signal is digitally down-converted to a low IF signal to produce an alias signal at the low IF frequency. The received symbols are correlated with expected local frequencies representing a mark and a space. The correlation is integrated in an oversampled manner relative to the symbol interval. A decision is made as to which symbol was received using, e.g., a magnitude comparator.

The invention relates to the field of multiple-spray-head ink-jet printers and provides a phase different electronic calibration system of multiple-spray-head printing spray points. The phase different electronic calibration system of the multiple-spray-head printing spray point comprises a main board, a phase logic processing unit, a first asynchronous first in first out (FIFO), a second asynchronous FIFO, a first driving circuit, a second driving circuit, a first spray head and a second spray head. By adopting an electronic calibration technology, machine calibration difficulty is reduced, and mechanical calibration mechanism is simplified. A spray head dolly direction signal is used for judging positive and negative of phase, thereby reducing complexity of the phase logic processing unit and simultaneously improving the reliability. Phase transmission is shown by adopting pulse width, thereby improving flexibility and reliability of the main board controlling phase different between the two spray heads. By means of separation of the phase logic processing unit and the main board, original main board design is retained ingeniously, development cost is reduced, and development progress is accelerated. The number of signals of the main board and the spray head driving circuits is decreased, the cost is reduced, and the signal sending reliability of the main board is improved.

Circuits comprising asynchronous linear pipelines and one-phase pipelines, and methods of forming asynchronous linear pipeline circuits and converting them to one-phase pipeline circuits are provided. Additional circuits, systems and methods are disclosed.

The invention discloses a circuit breaker having a zero-line disconnection and open-phase protection function. The circuit breaker comprises a circuit element including a three-phase line inlet wiring terminal, a three-phase line outlet wiring terminal, a zero line inlet wiring terminal, a zero-line outlet wiring terminal, a circuit breaker, three capacitors, a zero-sequence differential voltage relay, a current transformer, a current relay, a zero-line disconnection logic judgment module, a zero line disconnection signal relay, three low-voltage relays, an open-phase logic judgment module and a phase failure signal relay. In addition, the invention also discloses a circuit break system having a zero-line-breaking and open-phase protection function. With the circuit breaker and the circuit break system, the zero-line-breaking and open-phase detection function is realized. With the tripping protection way, losses caused by zero-line disconnection and open-phase running can be effectively reduced; and thus the personal and property safety of users can be protected.

The invention discloses a rotor position measurement method of a transverse flux switch reluctance motor without a position sensor. The rotor position measurement method comprises the steps of settingan initial position angle of the motor, and applying a high-frequency pulse voltage to an A phase; adding a step to the initial position angle of the motor, and sequentially calculating an inductancevalue corresponding to each angle to obtain an A phase angle-inductance relation curve; dividing the inductance curve in a mechanical angle period into six regions, performing fitting by employing aquadratic polynomial method to obtain an ideal inductance curve, analyzing the ideal inductance curve, selecting appropriate low-threshold inductance TL, and obtaining a starting phase logic in the mechanical angle period according to a relation between three-phase inductance and the TL in each region; simultaneously calculating a three-phase inductance value from a three-phase injection high-frequency pulse voltage, comparing the three-phase inductance value with the starting phase logic, and determining a starting phase; and injecting a next conduction phase of the starting phase into the high-frequency pulse voltage, switching off the starting phase after a commutation threshold is reached, and conducting the next phase to achieve commutation running. The rotor position measurement method is easy to implement and is relatively high in accuracy.

The invention discloses an implication type solid-phase logic gate based on BSA (bull serum albumin)/3-MPA (mercaptopropionic acid)-gold nanocluster-polyelectrolyte and a construction method of the implication type solid-phase logic gate. On the basis of the phenomenon that H+ can inhibit fluorescence quenching of Fe2+ to a BSA/3-MPA-gold nanocluster-polyelectrolyte solid-phase compound in an acetic acid buffer solution with the pH value of 4.6, the Fe2+ and the H+ are taken as input signals, the gold nanocluster-polyelectrolyte solid-phase compound serves as a signal converter, and an implication type solid-phase logic gate system is created. The logic gate system has the advantages of simplicity and convenience in operation (without any modifying and marking processes), high transferability, capability of being reset, diversification in signal reading and the like, and has good application prospect in the fields of clinical diagnosis, chemical sensing, environment monitoring and the like.

The invention provides a GaAs HEMT process-based positive voltage-to-negative voltage logic circuit. According to the positive-voltage-to-negative-voltage logic circuit, through the structural design of an input level shift circuit unit, a buffer circuit unit, an in-phase logic output circuit unit and a reverse-phase logic output circuit unit, an input positive pressure logic signal can be converted into two output complementary (in-phase and one-phase) negative pressure logic signals, the conversion structure is simple, and the conversion efficiency is high; each circuit unit is designed on the basis of a GaAs HEMT process, so that the positive-voltage-to-negative-voltage logic circuit can be directly integrated with a unit chip of a monolithic microwave integrated circuit such as a radio frequency switch, a numerical control attenuator and a numerical control phase shifter, the simplification and miniaturization of the application of the monolithic microwave integrated circuit system are promoted, and the power consumption of the monolithic microwave integrated circuit system is reduced.

The invention discloses a self-starting electric control device, a single-phase permanent-magnet motor and a self-starting electric control method. The self-starting electric control device comprises a power supply switch, a rectification module and a power supply phase logic judgment module, wherein the power supply switch is connected with a power supply and a main phase winding of the single-phase permanent magnet motor respectively and is connected with a secondary phase winding of the single-phase permanent magnet motor by a running capacitor so as to respectively control whether the power supply provides power for the main phase winding and the secondary phase winding or not, the rectification module is connected between the power supply switch and the secondary phase winding so that a d axis of a rotor of the single-phase permanent magnet motor is coincided with an axial line of the secondary phase winding, the power supply phase logic judgment module is connected with the power supply and communicates with the power supply switch, and when the d axis of the rotor is coincided with the axial line of the secondary phase winding and the power supply phase logic judgment module judges that a power supply phase is matched, the power supply switch controls the power supply to simultaneously supply power to the main phase winding and the secondary phase winding and also disconnect independent power supply to the secondary phase winding. The self-starting electric control device disclosed according to the invention has the advantages of high reliability and high starting success rate.

The invention relates to a level conversion circuit. The circuit is characterized in that an input voltage comparison circuit unit compares an input first logic signal with a reference voltage and outputs a second logic signal, the second logic signal is input to a level shift circuit unit of a source follower structure, and the level shift circuit unit performs level shift on the second logic signal and outputs a third logic signal; the third logic signal is input to a hysteresis feedback circuit unit of an active resistance voltage division structure, the hysteresis feedback circuit unit feeds back the third logic signal to a reference voltage end, the phase of the third logic signal is adjusted by an anti-phase logic output circuit unit, and a fourth logic signal is output; the third logic signal is fed back to the reference voltage end of the input voltage comparison circuit unit, when conditions such as temperature and power supply voltage change, the hysteresis interval width can be effectively guaranteed, the fluctuation range of upper and lower threshold voltage is reduced, and the problems that the hysteresis interval width is not enough and the accuracy is low are solved.

The invention discloses a burr-free asynchronous reset TSPC type D trigger with a scanning structure. The trigger comprises an enable circuit, a first-stage anti-phase logic, a second-stage anti-phaselogic, a third-stage anti-phase logic and a fourth-stage anti-phase logic, the enable circuit outputs an enable signal SE and a reverse signal SEN of the enable signal SE; the first-stage anti-phaselogic outputs a signal ml _ a according to the output of the enable circuit, a scanning signal SI, a data input D, a reset signal R and a clock CP; the second-stage anti-phase logic generates a signalml _ b from the input signal ml _ a under the control of the clock CP, the third-stage anti-phase logic generates a signal s1 _ a from the input signal ml _ b under the control of the clock CP and the reset signal R, and the fourth-stage anti-phase logic inverts the signal s1 _ a to output a signal Q; according to the invention, the burr problem and the power consumption loss can be effectively overcome, the high working speed and the small area are maintained, the general adaptability is improved, and the trigger is suitable for the design of a high-performance microprocessor.

The invention discloses a leakage current suppression method of a three-phase four-bridge-arm Z-source inverter. The method comprises the following steps: respectively comparing three-phase symmetrical sine waves with triangular carriers with phase difference of 120 degrees to obtain A, B and C three phases of logic signals; carrying out exclusive OR on the A, B and C three phases of logic signalsto obtain a D-phase logic signal; according to the area where the modulation wave is located, selecting a specific carrier wave to be compared with positive and negative direct-connection voltage signals to obtain a direct-connection control signal; and carrying out OR on the A, B, C and D four bridge-arm logic signals and the direct-connection signals to obtain a final control signal of the switching tube. According to the invention, no matter what mode the circuit is in, the common-mode voltage is kept constant, so that the leakage current is controlled within an allowable range; and moreover, the modulation mode has no complex calculation process, and is simple to implement.