841 results about "Analog signal processing" patented technology

A digital and analog television signal digitization and processing device that performs the digitization and processing functions using a common reference frequency source that is used to generate multiple subclock signals, wherein the reference frequency source is independent of any synchronizing characteristic of the input signal. For dual channel analog signal processing, the common frequency source is not locked to either channel/input signal. Digital signal processing is accomplished based on the same common reference frequency source. Advantageously, the present invention allows all of the analog-to-digital converters and decoder circuitry/logic necessary for simultaneously digitizing and processing several analog and digital television signals to be integrated on a single integrated circuit as well as eliminating duplicate frequency generation circuits.

Systems, methods, and apparatus for fault detection and interruption in power lines are provided. Circuitry is implemented via software and hardware that is configured to sense an operational aspect of a power line and apply signal processing to the sensed operational aspect to detect faults including different types of faults such as transient and steady state faults and can also be configured to identify the type of fault. Information on the fault and the identification of the type of fault can be displayed, stored, or some other output operation can be implemented. Circuitry can be implemented to provide digital signal processing and analog signal processing to, for example, independently and in parallel (e.g., redundant operation) detect faults and respond to faults as they occur (i.e., in real time). The types of faults can include transient type faults that can include ground, arc, line-to-line, and imbalance type faults and can also include steady state type faults (e.g., those showing wear in the machinery of a load).

A picture signal recording/reproducing apparatus is disclosed in which a CPU 11 records the identification information for discriminating the video cassette during picture recording on a magnetic tape, while recording the recording information indicating the recording contents, such as the still picture data for program scenes, in memories 13 and 14 in association with the identification information. During reproduction, the CPU 11 reads out still picture data of each program from the memories 13 and 14, while a digital signal processing circuit 15 converts the still picture data of each program as a multi-picture into analog signals which are outputted to a TV receiver via an analog signal processing circuit 23 and an output terminal 33. The result is that the scenes of plural programs recorded in each of plural video cassettes are displayed on the TV receiver. This permits the user to easily recognize the program recorded on the video cassettes and to reproduce the desired program or to record a program in an optimum video cassette.

The invention discloses a bracelet capable of collecting multi-parameter health indexes. The bracelet comprises a body and a wrist strap. The body comprises a shell body, a displaying screen, a power supply, a clock part and a main control system. The displaying screen, the power supply, the clock part and the main control system are arranged in the shell body. The main control system comprises a main printed board, a microprocessor, a storage, an analogue signal processing chip and a Bluetooth transmission device. The microprocessor, the storage, the analogue signal processing chip and the Bluetooth transmission device are arranged on the main printed board. An infrared temperature sensor, an alarming device, a gravitational acceleration sensor for step counting and a charging connector are arranged on the main printed board. A flexible connecting wire cable, a measuring printed board, a body surface temperature sensor, a photosensitive sensor and a light source are arranged on the wrist strap. The body surface temperature sensor, the photosensitive sensor and the light source are integrated on the measuring printed board. A tensioning device is arranged on the wrist strap. The bracelet is small and light, wearing and using are convenient, various health parameters can be monitored accurately, human body parameters are collected near the Neiguan point under a wrist of a palm side, the number of blood vessels under the wrist is large, pulsation is obvious, and accordingly the accuracy of data testing and obtaining through the bracelet is greatly improved.

A compute memory system can include a memory array and a controller that generates N-ary weighted (e.g., binary weighted) access pulses for a set of word lines during a single read operation. This multi-row read generates a charge on a bit line representing a word stored in a column of the memory array. The compute memory system further includes an embedded analog signal processor stage through which voltages from bit lines can be processed in the analog domain. Data is written into the memory array in a manner that stores words in columns instead of the traditional row configuration.

An apparatus and method for perceiving a physical and emotional state, which allows easy attachment to and detachment from a human body, and through which a bio-signal is simply detected, are provided. The apparatus includes a bio-signal detection part attached to a predetermined portion of a body for performing analog signal processing on at least one bio-signal detected from the body and outputting the processed bio-signal, and a bio-signal recognizing part for performing digital signal processing on the processed bio-signal received from the bio-signal detection part, perceiving the physical and emotional state from the result of the digital signal processing, and representing the physical and emotional state. Accordingly, the apparatus can be conveniently attached to a predetermined portion of a user's body, a bio-signal transmitted wirelessly or through a wire can be easily detected, a physical and emotional state which is perceived based on the detected bio-signal can be reported to the user, and a rapidly changing emotional state or an emotional state which remains for a long time can be perceived in real time.

A low power sound recognition sensor is configured to receive an analog signal that may contain a signature sound. Sparse sound parameter information is extracted from the analog signal and compared to a sound parameter reference stored locally with the sound recognition sensor to detect when the signature sound is received in the analog signal. A portion of the sparse sound parameter information is differential zero crossing (ZC) counts. Differential ZC rate may be determined by measuring a number of times the analog signal crosses a threshold value during each of a sequence of time frames to form a sequence of ZC counts and taking a difference between selected pairs of ZC counts to form a sequence of differential ZC counts.

The invention relates to a portable wireless electroencephalogram acquisition device which comprises a plurality of scalp electrodes. The scalp electrodes are connected with the input end of an electroencephalogram acquisition module and used for acquiring electroencephalogram signals; the output ends of the scalp electrodes are connected with an electroencephalogram signal extraction module; and the electroencephalogram signals processed by using the electroencephalogram signal extraction module are input into an electroencephalogram signal processing module and sent to an electroencephalogram signal receiving end in a wireless way. The volume of the front-end circuit of the traditional electroencephalogram acquisition system is greatly reduced, and the wireless electroencephalogram acquisition device is hereby portable. Due to the adoption of the wireless transmission way, the restriction of the wired electroencephalogram acquisition system to the spacial position of the tested object is eliminated. The processing of the analog signal in the traditional electroencephalogram acquisition system is converted into the processing of the digital signal, and due to the adoption of the digital signal processing method, the parameters of the electroencephalogram acquisition system can be adjusted flexibly, the electroencephalogram acquisition system can be optimized, and the cost of the electroencephalogram acquisition system can be reduced.

A method and system for establishing a communication link in a wireless power system from a wireless power transmitter (WPT) to a wireless power receiver (WPR) is provided. A flux modulator is operably disposed in the WPT for dynamically changing the WPT's impedance so as to modulate a magnetic field produced on the transmitter coil when a primary voltage applied to the WPT. A flux demodulator is operably disposed in the WPR for receiving and demodulating a secondary voltage induced on a receiver coil due to the modulated magnetic field on the transmitter coil. The induction of the secondary voltage on the receiver coil due to the modulated magnetic field on the transmitter coil establishes the communication link from the WPT to the WPR. The flux demodulator is configured as an analog signal processing chain or a digital signal processing block for decoding information obtained from the WPT.

Analog iterative decoders are provided that are based on the so-called min-sum algorithm (also referred to as max-sum or max-product, Max-Log-MAP or BP-based decoding) and can be used to decode powerful coding schemes such as low-density parity-check (LDPC) codes and turbo codes. The circuits can be implemented by standard CMOS technology, which means lower fabrication cost and/or simpler design compared to previously reported analog iterative decoders that are based on BiCMOS or sub-threshold CMOS technology. Soft information is passed among variable nodes and parity-check nodes. A low-voltage high-swing Max WTA circuit is also provided. The circuit can be implemented by short channel MOSFET transistors and yet provide a reasonably high degree of accuracy. Applications include soft computing, and analog signal processing, in general. A Min WTA circuit can also be built based on this circuit by subtracting the input currents from a large reference current.

The invention discloses a digitized photoelectric detector sensing circuit provided with a plurality of signal paths. The digitized photoelectric detector sensing circuit comprises a front end sensingunit consisting of a plurality of unit circuits, a column-shared integrating circuit connected with the front end sensing unit, a high-speed and high-precision comparator connected with the column-shared integrating circuit, a delay control unit connected with the high-speed and high-precision comparator, a counter connected with the delay control unit and an output buffering stage connected withthe counter, the output buffer stage is further connected with a column selection register, the output buffering stage forms an output end, and the plurality of unit circuits are further respectivelyconnected with a row selection register, wherein each signal path comprises one unit circuit. The digitized photoelectric detector sensing circuit utilizes an analogue-digital signal conversion technology of pulse frequency coding to advance the position from the analogue-to-digital conversion so as to efficiently reduce the analogue signal processing circuit, eliminate the column fixing mode noise and the column sensing noise in the analogue signal sensing circuit and improve the sensing signal-to-noise ratio.

Pool alarm system for detecting the introduction and/or presence of a body in a liquid pool. The system includes: a first sensor for sensing audio signals generated by the body in the pool; a second sensor for sensing water pressure signals generated by the body in the pool; an analog signal processor for pre-processing the audio signals and water pressure signals and for converting them to digital data; an alarm device activated when the body was detected in the pool; a processor and control unit. The audio signals are detected and processed faster than the detection of the water pressure signal. According to the intensity of an acoustic signature originating from the audible signals an aquatic signature originating from the water pressure sensor is analyzed using an adaptable sensitivity parameter dependent on the intensity of the acoustic signature for improving alarm triggering decision.