12 results about "Analog to digital conversion" patented technology

A solid-state image pickup device includes a pixel array including a plurality of pixels, each having a photoelectric converter; a signal conversion circuit converting a pixel signal from the pixel array into an output signal; and a clamp correction circuit correcting a clamp level included in a predetermined signal dealt with by the signal conversion circuit. The clamp correction circuit includes an analog-to-digital converter performing analog-to-digital conversion of the predetermined signal and generating and outputting N+M bits of digital data at the time of analog-to-digital conversion, N+M bits being obtained by adding M bits for correction to N bits assigned to the predetermined signal; a correction-value generating unit determining a correction value based on the N+M bits of digital data and a target value; and a computing unit performing a correction computation using the N+M bits of digital data and the correction value to generate N bits of clamp-corrected data.

The invention provides an electronic thermometer capable of conducting measuring at an ear lobe portion fast. The electronic thermometer comprises a power supply, a temperature collecting module, an analog-to-digital conversion chip, a microcontroller and a liquid crystal display (LCD), wherein the temperature collecting module, the analog-to-digital conversion chip, the microcontroller and the LCD display are sequentially connected. The power supply is respectively connected with the temperature collecting module, the analog-to-digital conversion chip and the microcontroller. The temperature collecting module comprises a metal temperature sensing plate and a negative temperature coefficient (NTC) thermal sensitive resistor unpackaged bare chip. The NTC thermal sensitive resistor unpackaged bare chip is connected onto the metal temperature sensing plate in fastening mode. The electronic thermometer has the advantage of being simple in structure, short in measuring time and low in cost.

The invention relates to a nanosecond level pulse peak value detection method and belongs to the technical field of optical communication. According to the method, a nanosecond level pulse signal is broadened through a low-pass filter, then, a clock signal obtained after phase position adjustment is triggered, and therefore an analog-digital converter can sample data more accurately. Under the condition that a high-speed analog-digital converter is not needed, a nanosecond level pulse signal peak value can be detected. With the detection method, the requirement for the sampling rate of an analog-to-digital conversion unit can be lowered, the method is simple and easy to perform, and cost of the needed devices is low.

Wideband digital distributed communications systems (DCSs) employing reconfigurable digital signal processing circuit for scaling supported communications services are disclosed. The DCS includes a head-end unit that includes front end downlink signal processing circuit to receive and distribute downlink communications signals for communications services (i.e., communications bands) to remote units. The remote units also include front end uplink signal processing circuits to receive uplink communications signals to be distributed to the head-end unit. The front end signal processing circuits are either equipped with broadband filters, or such filters are eliminated, to allow the DCS to be scaled to pass added communications bands. The front end processing circuits include analog-to-digital conversion (ADC) circuits for converting received analog communications signals into digital communications signals so that the digital communications signals can be processed by digital signal processing circuit that can flexibly be configured and reconfigured to support the added communications bands.

The invention provides a VPX signal processing backboard and aims at improving the distributed signal processing capacity, reducing the cost of a distributed system and improving the efficiency by fully utilizing the advantages of a VPX bus. The VPX signal processing backboard comprises a power module, a communication module, a buffer module, a signal preprocessing module and a D/A (Digital to Analog) module, wherein the power module supplies electric power to the VPX signal processing backboard; the communication module receives a data signal detected by each distributed sub-module from a distributed environment and sends a driving signal to the outside; the signal preprocessing module is used for digitally amplifying and digitally filtering the signal; the buffer module is used for temporarily storing an input signal and an output signal of the signal preprocessing module; the D/A module is used for performing analog to digital conversion to generate a driving signal to be output. According to the VPX signal processing backboard, data of the distributed system can be acquired and processed favorably, the robustness of the distributed system is improved, and each monitoring sub-module of the distributed system focuses on the functional development favorably.

The invention discloses a power amplifier monitoring method and a power amplification circuit, and the method comprises the steps: collecting an analog voltage group and an analog current group of a power amplifier in real time through a collection module, and transmitting the analog voltage group and the analog current group to a conversion module; performing voltage analog-to-digital conversion on the analog voltage group through a conversion module to obtain a digital voltage group, performing current analog-to-digital conversion on the analog current group to obtain a digital current group, and transmitting the digital voltage group and the digital current group to a monitoring module; the monitoring module outputs the working parameters of the digital voltage group and the digital current group to obtain the parameter group and judges the threshold values of the working parameters in the parameter group to obtain the monitoring result, and the monitoring result shows whether the power amplifier works in the safe area or not. The working state of the power amplifier is accurately monitored, and the performance of the power amplifier is fully utilized.

The invention discloses a microelectrode amplifier. The microelectrode amplifier comprises a microelectrode input circuit, a sampling resistor, a signal follower, a first signal conditioning circuit,a second signal conditioning circuit, a third signal conditioning circuit, a fourth signal conditioning circuit, an adder, a first digital-to-analog conversion unit, a second digital-to-analog conversion unit, a third digital-to-analog conversion unit, an analog-to-digital conversion unit, a processor, a single-pole switch and an interface unit. The interface unit comprises a return-to-zero outputinterface used for outputting return-to-zero signals, an output interface used for outputting compensated signals, and a digital interface used for outputting pole resistance values. According to themicroelectrode amplifier, the invention is not only applied to a cell research, but also can be applied to an environmental detection, and the amplifier is small in size, low in cost, stable in performance, and is not limited to the precision of electronic devices, and a pole resistance measurement, a quick return-to-zero operation and a negative capacitance compensation can be realized.

The invention discloses an integral-circuit-based temperature automatic control system used for a farm. The temperature automatic control system is characterized by mainly comprising a microcontroller, a display, a heater control electromagnetic switch, a draught fan control electromagnetic switch, a signal processing unit, a heater, a draught fan, an analog-to-digital conversion module and a temperature sensor, wherein the display, the heater control electromagnetic switch, the draught fan control electromagnetic switch and the signal processing unit are connected with the microcontroller; the heater is connected with the heater control electromagnetic switch; the draught fan is connected with the draught fan control electromagnetic switch; the analog-to-digital conversion module is connected with the signal processing unit; and the temperature sensor is connected with the analog-to-digital conversion module. According to the temperature automatic control system, a detection signal is more stable after being processed by the signal processing unit, thus the microcontroller can perform identification and comparison on the detection signal more precisely, and the control precision of the temperature inside the farm is improved.

The invention discloses a temperature and humidity detection and alarm system based on a single-chip microcomputer, which comprises a single-chip microcomputer and is characterized by further comprising a temperature sensor, a humidity sensor, a display module and an alarm module, wherein the temperature sensor and the humidity sensor are connected with the single-chip microcomputer through an ADC(Analog-to-Digital Conversion) module; and the display module and the alarm module are connected with the single-chip microcomputer. The temperature and humidity detection and alarm system based on the single-chip microcomputer meets the requirement of user diversity, and also meets users of different classes at the same time, not only can be installed in residential houses to use, but also can be installed in crop greenhouses or warehouses to use. The temperature and humidity detection and alarm system performs early warning on a risk by using an alarm circuit, thereby enabling the users toquickly know that the environment is abnormal. In addition, the temperature and humidity detection and alarm system realizes wireless transmission of signals by using a ZigBee module, and avoids tedious construction and inconvenient use brought about by wired transmission.