8168 results about "Analog to digital conversion" patented technology

A miniature wireless apparatus for collecting physiological signals comprises an electrode pair, an amplifier module, a microcontroller, a wireless module, and a battery. The electrode pair collects a pair of physiological signals of a person under test. The amplifier module amplifies the pair of physiological signals. The microcontroller performs an analog-to-digital conversion and a data compression for an amplified physiological signal generated by the amplifier module. The wireless module modulates a digital physiological signal generated by the microcontroller and transmitting the modulated digital physiological signal to a receiver at the far end. The apparatus can be implemented by a structure of multilayered circuit boards. With the progress of semiconductor technology, all the components of the miniature wireless apparatus can be further integrated to one circuit board, or even one chip.

A miniature wireless apparatus for collecting physiological signals comprises an electrode pair, an amplifier module, a microcontroller, a wireless module, and a battery. The electrode pair collects a pair of physiological signals of a person under test. The amplifier module amplifies the pair of physiological signals. The microcontroller performs an analog-to-digital conversion and a data compression for an amplified physiological signal generated by the amplifier module. The wireless module modulates a digital physiological signal generated by the microcontroller and transmitting the modulated digital physiological signal to a receiver at the far end. The apparatus can be implemented by a structure of multilayered circuit boards. With the progress of semiconductor technology, all the components of the miniature wireless apparatus can be further integrated to one circuit board, or even one chip.

A signal compression method and apparatus for a base transceiver system (BTS) in a wireless communication network provides efficient transfer of compressed signal samples over serial data links in the system. For the uplink, an RF unit of the BTS compresses signal samples resulting from analog to digital conversion of an analog signal received via an antenna. The RF unit transfers the compressed signal samples over the serial data link to the base station processor where they are decompressed prior to the normal signal processing operations. For the downlink, the base station processor compresses signal samples and transfers the compressed signal samples over the serial data link to the RF unit. The RF unit decompresses the compressed samples and converts the decompressed samples to an analog signal for transmission over an antenna. Compression and decompression can be incorporated into operations of conventional base stations and distributed antenna systems.

Methods and systems for mitigating latency in a data detector feedback loop are included. For example, a method for reducing latency in an error corrected data retrieval system is included. The method includes performing an analog to digital conversion at a sampling instant to create a digital sample, and performing a data detection on the digital sample to create a detected output. The detected output is compared with the digital sample to determine a phase error. During an interim period, the digital sample is adjusted to reflect the phase error to create an adjusted digital sample. After the interim period, the sampling instant is adjusted to reflect the phase error.

Disclosed in the invention is a programmable visual chip-based visual image processing system, comprising an image sensor and a multilevel parallel digital processing circuit. The image sensor mainly includes a pixel array, an analog preprocessing circuit array and an analog-to-digital conversion circuit array; and the digital processing circuit consists of a parallel processing unit array with an M*M pixel level, a parallel processing unit array with M*1 rows, an on-chip artificial neural network and a reduced instruction processor dual-core subsystem. According to the provided system, high quality image collection with high speed and multilevel parallel image processing are realized and several high-speed intelligent visual application can be realized by programming; and compared with a traditional image system, the provided system has advantages of high speed, high integration, low power consumption and low cost. Moreover, the invention brings forward an embodiment for realizing the above-mentioned system as well as several high-speed intelligent visual image processing algorithms based on the embodiment. High-speed motion detection, high-speed gesture identification and rapid face detection are included; and the processing speed can reach 1000 frames per second. Therefore, a requirement of high-speed real-time processing can be met.

A signal compression method and apparatus for a base transceiver system (BTS) in a wireless communication network provides efficient transfer of compressed signal samples over serial data links in the system. For the uplink, an RF unit of the BTS compresses signal samples resulting from analog to digital conversion of an analog signal received via an antenna. The RF unit transfers the compressed signal samples over the serial data link to the base station processor where they are decompressed prior to the normal signal processing operations. For the downlink, the base station processor compresses signal samples and transfers the compressed signal samples over the serial data link to the RF unit. The RF unit decompresses the compressed samples and converts the decompressed samples to an analog signal for transmission over an antenna. Compression and decompression can be incorporated into operations of conventional base stations and distributed antenna systems.

A comparator is arranged to compare a series of analog voltage signal samples on a first capacitor with a voltage on a second capacitor which is linearly increased or decreased to equal the sample value. The comparator's single output freezes the count of the counter at counts which are proportional to the voltage of the respective samples. In this manner, analog to digital conversion can be accomplished using a single line between the analog and digital sides of a circuit, thereby reducing parasitic capacitance.

An image pickup device is provided, capable of complete correction with data of once analog-to-digital conversion, and prevention of excess use of switches and analog devices and / or erroneous correction, including: an image sensor having a plurality of analog-to-digital converters determining conversion results from a digital signal of higher order bit through separate steps of two or more times; a first correction unit which has a correction factor for correcting nonlinear errors of the plurality of analog-to-digital converters so as to adapt to the analog-to-digital converters and corrects a nonlinear error of a digital signal output from respective analog-to-digital converters based on a correction factor corresponding to respective analog-to-digital converters, characterized in that the first correction unit corrects the nonlinear errors after converting the digital signals from the plurality of analog-to-digital converters into a serial output.