Abstract: A phase-locked loop (PLL) includes a phase-frequency detector (PFD) having a first PFD input, a second PFD input, and a PFD output. The PFD is configured to generate a first signal on the PFD output. The first signal comprises pulses having pulse widths indicative of a phase difference between signals on the first and second PFD inputs. A low pass filter (LPF) has an LPF input and an LPF output. The LPF input is coupled to the PFD output. A flip-flop has a clock input and a flip-flop output. The clock input is coupled to the LPF output. A lock-slip control circuit is coupled to the flip-flop output and to the first PFD input. The lock-slip control circuit is configured to determine phase-lock and phase-slip based at least in part on a signal on the flip-flop output.

Abstract: A phase-locked loop (PLL) includes a phase-frequency detector (PFD) having a first PFD input, a second PFD input, and a PFD output. The PFD is configured to generate a first signal on the PFD output. The first signal comprises pulses having pulse widths indicative of a phase difference between signals on the first and second PFD inputs. A low pass filter (LPF) has an LPF input and an LPF output. The LPF input is coupled to the PFD output. A flip-flop has a clock input and a flip-flop output. The clock input is coupled to the LPF output. A lock-slip control circuit is coupled to the flip-flop output and to the first PFD input. The lock-slip control circuit is configured to determine phase-lock and phase-slip based at least in part on a signal on the flip-flop output.

Abstract: A system and method of teaching a neural network through reinforcement learning methodology. The system includes a machine-readable medium having one or more processors that perform a motion task to produce a first result corresponding to navigating a device during a first episode and performing an interaction task during that same episode. After completion of the first episode a processor calculates a Q value change based on the first task result and the second task result. The processor then modifies parameters based on the Q value change such that during subsequent episode iterations the motion task and interactive task are improved and a smooth and continuous transition occurs between these two tasks.

Abstract: A phase-locked loop (PLL) includes a phase-frequency detector (PFD) having a first PFD input, a second PFD input, and a PFD output. The PFD is configured to generate a first signal on the PFD output. The first signal comprises pulses having pulse widths indicative of a phase difference between signals on the first and second PFD inputs. A low pass filter (LPF) has an LPF input and an LPF output. The LPF input is coupled to the PFD output. A flip-flop has a clock input and a flip-flop output. The clock input is coupled to the LPF output. A lock-slip control circuit is coupled to the flip-flop output and to the first PFD input. The lock-slip control circuit is configured to determine phase-lock and phase-slip based at least in part on a signal on the flip-flop output.

Abstract: Provided is a permanent magnet brush micromotor and an assembly method thereof. Its upper stator bracket and lower stator bracket are designed to fit together, and the concave parts of the upper stator bracket and lower stator bracket are matched to form a complete mounting cavity for mounting a motor shaft, core winding, bearings and commutator. The core winding, bearings and commutator are installed on the motor shaft to form a mover assembly, and then the mover assembly is installed in the concave part of the lower stator bracket. Finally, combining and fixing the upper stator bracket and lower stator bracket with electric brushes which are respectively placed in brush mounting positions. And, two bearings are fixed or pressed on the same component, so that the concentricity and coaxiality of the bearings can be ensured, the compression of the central biasing force is avoided during assembly.

Abstract: A phase-locked loop (PLL) includes a phase-frequency detector (PFD) having a first PFD input, a second PFD input, and a PFD output. The PFD is configured to generate a first signal on the PFD output. The first signal comprises pulses having pulse widths indicative of a phase difference between signals on the first and second PFD inputs. A low pass filter (LPF) has an LPF input and an LPF output. The LPF input is coupled to the PFD output. A flip-flop has a clock input and a flip-flop output. The clock input is coupled to the LPF output. A lock-slip control circuit is coupled to the flip-flop output and to the first PFD input. The lock-slip control circuit is configured to determine phase-lock and phase-slip based at least in part on a signal on the flip-flop output.

Abstract: A phase-locked loop (PLL) includes a phase-frequency detector (PFD) having a first PFD input, a second PFD input, and a PFD output. The PFD is configured to generate a first signal on the PFD output. The first signal comprises pulses having pulse widths indicative of a phase difference between signals on the first and second PFD inputs. A low pass filter (LPF) has an LPF input and an LPF output. The LPF input is coupled to the PFD output. A flip-flop has a clock input and a flip-flop output. The clock input is coupled to the LPF output. A lock-slip control circuit is coupled to the flip-flop output and to the first PFD input. The lock-slip control circuit is configured to determine phase-lock and phase-slip based at least in part on a signal on the flip-flop output.

Abstract: Provided is a permanent magnet brush micromotor and an assembly method thereof. Its upper stator bracket and lower stator bracket are designed to fit together, and the concave parts of the upper stator bracket and lower stator bracket are matched to form a complete mounting cavity for mounting a motor shaft, core winding, bearings and commutator. The core winding, bearings and commutator are installed on the motor shaft to form a mover assembly, and then the mover assembly is installed in the concave part of the lower stator bracket. Finally, combining and fixing the upper stator bracket and lower stator bracket with electric brushes which are respectively placed in brush mounting positions. And, two bearings are fixed or pressed on the same component, so that the concentricity and coaxiality of the bearings can be ensured, the compression of the central biasing force is avoided during assembly.

Abstract: Control method for oscillating motor and osculating motor The control unit is further used for storing the set pulse parameters, and outputting alternating pulses with corresponding pulse widths and frequencies according to the set pulse parameters, so that the oscillating arm oscillates in an oscillation mode corresponding to the pulse parameters; wherein the oscillation mode comprises at least one of a full-amplitude oscillation mode, a sub-amplitude oscillation mode, an in-situ shaking mode and a composite oscillation mode, wherein the composite oscillation mode is generated by superposition of the full-amplitude oscillation mode and the in-situ shaking mode, or is generated by superposition of the sub-amplitude oscillation mode and the in-situ shaking mode.

Abstract: A phase-locked loop (PLL) includes a phase-frequency detector (PFD) having a first PFD input, a second PFD input, and a PFD output. The PFD is configured to generate a first signal on the PFD output. The first signal comprises pulses having pulse widths indicative of a phase difference between signals on the first and second PFD inputs. A low pass filter (LPF) has an LPF input and an LPF output. The LPF input is coupled to the PFD output. A flip-flop has a clock input and a flip-flop output. The clock input is coupled to the LPF output. A lock-slip control circuit is coupled to the flip-flop output and to the first PFD input. The lock-slip control circuit is configured to determine phase-lock and phase-slip based at least in part on a signal on the flip-flop output.

Abstract: Provided is an electric grinder. The grinder includes a swing motor and a grinding head driven by the swing motor. The swing motor further includes a U-shaped yoke, four permanent magnets and a swing arm. Alternating magnetic poles can be generated at end faces of the two legs under control of a control circuit. The four permanent magnets are sequentially distributed on the same circumference of a circle having the fulcrum as a center. The control circuit generates alternating pulses with adjustable pulse widths, which change the moving direction of the permanent magnets alternately, so that the permanent magnets move back and forth. The swing arm drives the grinding head to reciprocate at a high speed with small swinging amplitude, thereby cleaning the body surface (skin, nails or the like) of living bodies including human beings and animals.

Abstract: Provided are an electric toothbrush and its drive motor, which comprises a U-shaped magnetic yoke, a rotary output component, a second magnetic yoke and four permanent magnets. The two support legs of the U-shaped yoke are respectively wound with coils, enabling the two leg end faces to generate alternating magnetic poles under the control of circuit. The four permanent magnets are centrosymmetrically disposed about a rotatory central line, the first and the fourth magnet are of the same polarity, the second and the third magnet are of the same polarity; the first and the second magnet are of the opposite polarity, disposed corresponding to the first leg; the third and the fourth magnet are of the opposite polarity, disposed corresponding to the second leg. Under the control of circuit, the driving permanent magnets drive the second yoke and the rotary output component to reciprocatively rotate about the rotatory central line.

Abstract: Control method for oscillating motor and osculating motor The control unit is further used for storing the set pulse parameters, and outputting alternating pulses with corresponding pulse widths and frequencies according to the set pulse parameters, so that the oscillating arm oscillates in an oscillation mode corresponding to the pulse parameters; wherein the oscillation mode comprises at least one of a full-amplitude oscillation mode, a sub-amplitude oscillation mode, an in-situ shaking mode and a composite oscillation mode, wherein the composite oscillation mode is generated by superposition of the full-amplitude oscillation mode and the in-situ shaking mode, or is generated by superposition of the sub-amplitude oscillation mode and the in-situ shaking mode.

Abstract: An oscillating motor and electric clippers. The oscillating motor includes a U-shaped magnetic yoke, four permanent magnets and a swing arm. The U-shaped magnetic yoke causes end faces of two support legs to produce alternating magnetic poles with the control circuit. The four permanent magnets are fixedly mounted to an inner arm via a second magnetic yoke. The four permanent magnets are sequentially distributed on a same circumferential surface having a fulcrum being a centre of rotation. The polarities of radial end faces of the first permanent magnet and the fourth permanent magnet are the same. The polarities of radial end faces of the second permanent magnet and the third permanent magnet are the same, and the opposite of the polarity of the radial end face of the first permanent magnet. When a coil is electrified, the four permanent magnets produce torque having the same direction of rotation.

Abstract: A system (and associated method) includes an input flip-flop, a counter, and a clock tree. The input flip-flop includes a clock input terminal configured to be coupled to a device clock, or a clock generated from a phase-locked loop, and a data input terminal configured to be coupled to a first reference signal. The input flip-flop is configured to use the device clock to latch the reference signal to produce a latched reference signal. The counter is configured to count pulses of the device clock starting upon detection of the latched reference signal and to output a second reference signal comprising a pulse for every L pulses of the device clock. The clock tree is configured to divide down the device clock to generate a first output clock. The clock tree is configured to be synchronized by a pulse of the second reference signal.

Abstract: Provided are an electric toothbrush and its drive motor, which comprises a U-shaped magnetic yoke, a rotary output component, a second magnetic yoke and four permanent magnets. The two support legs of the U-shaped yoke are respectively wound with coils, enabling the two leg end faces to generate alternating magnetic poles under the control of circuit. The four magnets are centrosymmetrically disposed about a rotatory central line, the first and the fourth magnet are of the same polarity, the second and the third magnet are of the same polarity; the first and the second magnet are of the opposite polarity, disposed corresponding to the first leg; the third and the fourth magnet are of the opposite polarity, disposed corresponding to the second leg. Under the control of circuit, the driving permanent magnets drive the second yoke and the rotary output component to reciprocatively rotate about the rotatory central line.

Abstract: Provided is an oscillating motor and electric clippers. The oscillating motor includes a U-shaped magnetic yoke, four permanent magnets and a swing arm. The U-shaped magnetic yoke causes end faces of two support legs to produce alternating magnetic poles with the control circuit. The four permanent magnets are fixedly mounted to an inner arm via a second magnetic yoke. The four permanent magnets are sequentially distributed on a same circumferential surface having a fulcrum being a circle centre. The polarities of radial end faces of the first permanent magnet and the fourth permanent magnet are the same. The polarities of radial end faces of the second permanent magnet and the third permanent magnet are the same, and the opposite of the polarity of the radial end face of the first permanent magnet. When a coil is electrified, the four permanent magnets produce torque having the same direction of rotation.

Abstract: Provided is an electric grinder. The grinder includes a swing motor and a grinding head driven by the swing motor. The swing motor further includes a U-shaped yoke, four permanent magnets and a swing arm. Alternating magnetic poles can be generated at end faces of the two legs under control of a control circuit. The four permanent magnets are sequentially distributed on the same circumference of a circle having the fulcrum as a center. The control circuit generates alternating pulses with adjustable pulse widths, which change the moving direction of the permanent magnets alternately, so that the permanent magnets move back and forth. The swing arm drives the grinding head to reciprocate at a high speed with small swinging amplitude, thereby cleaning the body surface (skin, nails or the like) of living bodies including human beings and animals.

Abstract: A system (and associated method) includes an input flip-flop, a counter, and a clock tree. The input flip-flop includes a clock input terminal configured to be coupled to a device clock, or a clock generated from a phase-locked loop, and a data input terminal configured to be coupled to a first reference signal. The input flip-flop is configured to use the device clock to latch the reference signal to produce a latched reference signal. The counter is configured to count pulses of the device clock starting upon detection of the latched reference signal and to output a second reference signal comprising a pulse for every L pulses of the device clock. The clock tree is configured to divide down the device clock to generate a first output clock. The clock tree is configured to be synchronized by a pulse of the second reference signal.

Abstract: A system (and associated method) includes an input flip-flop, a counter, and a clock tree. The input flip-flop includes a clock input terminal configured to be coupled to a device clock, or a clock generated from a phase-locked loop, and a data input terminal configured to be coupled to a first reference signal. The input flip-flop is configured to use the device clock to latch the reference signal to produce a latched reference signal. The counter is configured to count pulses of the device clock starting upon detection of the latched reference signal and to output a second reference signal comprising a pulse for every L pulses of the device clock. The clock tree is configured to divide down the device clock to generate a first output clock. The clock tree is configured to be synchronized by a pulse of the second reference signal.