摘要:
An electrostatic discharge (ESD) device for protecting an input/output terminal of a circuit, the device comprising a first transistor with an integrated silicon-controlled rectifier (SCR) coupled between the input/output (I/O) terminal of the circuit and a node and a second transistor with an integrated silicon-controlled rectifier coupled between the node and a negative terminal of a supply voltage, wherein the silicon-controlled rectifier of the first transistor triggers in response to a negative ESD voltage and the silicon-controlled rectifier of the second transistor triggers in response to a positive ESD voltage.
摘要:
A differential bus network, in general, or a controller area network (CAN) driver, in particular, controls and minimizes the variation on the common-mode signal of the CAN bus. This CAN driver also provides improved symmetry between its differential output signals, CANH and CANL, and provides protection for its low voltage devices from voltage transients occurring on its output lines. The common-mode signal is sensed and buffered, then during the dominant to recessive transition, the bus signals are shorted to the buffered common mode voltage. Specifically, additional switches or transistors are used to pull the differential output signals, CANH and CANL, to the common mode signal VCM when the state of the CAN bus transitions from dominant to recessive. This improvement minimizes high frequency spikes in the common-mode signal and eliminates DC shifts during transitions of the state of the CAN bus. A driver system may include a plurality of CAN drivers are serially interconnected to form a driver system, wherein each downstream driver stage receives a time-delayed form of the digital input signal TxD, each stage providing a time-delayed contribution to the differential output signals of the overall driver system.
摘要翻译:通常,差分总线网络或控制器局域网(CAN)驱动器特别地控制并最小化CAN总线的共模信号的变化。 该CAN驱动器还提供其差分输出信号CANH和CANL之间的对称性,并为其低电压器件提供对其输出线路上出现的电压瞬变的保护。 共模信号被感测和缓冲,然后在显性到隐性转变期间,总线信号被短路到缓冲的共模电压。 具体地说,当CAN总线的状态从主导到隐性转变时,使用附加的开关或晶体管将差分输出信号CANH和CANL拉到共模信号V SUB CM。 这种改进使共模信号中的高频峰值最小化,并消除了CAN总线状态转换期间的直流偏移。 驱动器系统可以包括多个CAN驱动器串行互连以形成驱动器系统,其中每个下游驱动器级接收时间延迟形式的数字输入信号TxD,每个级提供对差分输出信号的时间延迟贡献 的整体驱动系统。
摘要:
An AC to DC converter system is disclosed in which a conversion circuit for converting an AC input signal to a DC output signal is operably coupled with a communication circuit designed for sensing output indicative of the presence or absence of a load at the DC output. The system is designed so that the conversion circuit operates in an inactive standby state when there is no load, and in an active state for supplying DC power when a load is present. The system is configured to operate using ultra-low power.
摘要:
The disclosed invention provides electrochemical dispensing apparatus. According to the principles of the invention, a microelectronic electrochemical dispenser is used to cause the release of one or more selected chemical substance from a stored chemical compound. The release is controlled using a timer or sensor apparatus in a controlling device, preferably an ASIC.
摘要:
An AC to DC converter system is disclosed in which a conversion circuit for converting an AC input signal to a DC output signal is operably coupled with a communication circuit designed for sensing output indicative of the presence or absence of a load at the DC output. The system is designed so that the conversion circuit operates in an inactive standby state when there is no load, and in an active state for supplying DC power when a load is present. The system is configured to operate using ultra-low power.
摘要:
Coupled inductor systems are disclosed in which transmitter and receiver inductors, or coils, are coupled in a configuration for wirelessly transferring power and/or data among them. In preferred implementations, the systems are used for transmitting both power and data in pairs of coupled coils. Primary side circuits in preferred embodiments of the systems of the invention employ Class D or Class G amplifiers.
摘要:
The invention provides integrated power supplies, circuit drivers, and control methods for relatively high-current drivers, usable with common battery power sources. Preferred embodiments include one or more high series resistance super-capacitors electrically connected with a power. A low resistance driver circuit regulates power supplied from the super-capacitors to the load.
摘要:
Systems and apparatus are disclosed for detecting biological agents in fluids. Biosensor apparatus utilizes a sample chamber configured for receiving a fluid sample. Wells accessible from the sample chamber include electrodes deployed for receiving one or more electromagnetic signal from each of the wells. The electrodes are pre-provided with biomaterial deposits selected to attract particular biological agents of interest. An integrated circuit connected with electrodes facilitates electromagnetic signal acquisition and processing of parameters measurable at the well electrodes.
摘要:
A communication system for use with a motorcycle includes a main unit that has a detector and a transmitter that transmits an alert signal upon the detection of a radar or laser by the detector. The system further includes either a visual indicator or an audio indicator. The visual indicator has a receiver that receives the alert signal from the transmitter, and a display which provides a visual display of the alert signal. The audio indicator has a receiver that receives the alert signal from the transmitter, and a speaker which emits an auditory response of the alert signal. The system can further include a mounting assembly having a connector that is removably connected to a part of a motorcycle, a support bracket to which the main unit is removably coupled, and a link that pivotably couples the support bracket and the connector.
摘要:
A blade set for paper shredders is disclosed. In one embodiment, a notched blade having at least two notches in proximity to a central hole is brought into contact with a mating blade also having a central hole. Force is applied to the mating blade in such a fashion as to displace some of the body of the mating blade into the notches. This acts to substantially secure the blades together. In another embodiment, the notches are disposed on the edge of the blade and through the periphery. In yet another embodiment, one blade can have holes and not notches.