Is the use of floating gate EPROM programmable memory production, its storage units to use more N-channel stacked-gate MOS (SIMOS), in addition to the control gate, there is no outer lead of a gate is floating gate. When there is no charge on the floating gate when the control voltage coupled to the control gate, MOS MOSFET; and 114 datasheet and when a negative charge on the floating gate when the substrate surfac...

When the air conditioning, the indoor fluorescent light will be dimmed for an instant phenomenon, this is because a lot of current flowing air, the rapid voltage drop, using the same power of fluorescent affected. There will be a vacuum cleaner when the radio "Para Para" noise. The reason is the engine of the weak vacuum cleaner (low-intensity high-frequency) voltage / current change through the p...

MCS-51 is produced by the United States a series of single-chip Intel Corporation, collectively, this series of microcontrollers, including quite a few varieties, such as 8031,8051,8751,8032,8052,8752, etc., of which 8051 is the earliest and 179 datasheet and most typical product of the Other MCU 8051 series are based on the function of the increase, reduce, change comes, so people used to use 8051 to refer to MCS-...

Multimeter can be used to quickly determine, determine the method: first transistor emitter with a multimeter to measure the resistance of the reverse, if it is measured PNP-tube, the negative terminated Multimeter base, emitter is terminated; If the tube is a measure of NPN type, the meter base is terminated, a negative termination emitter. Then use a multimeter R 1kQ block measurement, the mu...

When the integrated circuit has a fault that should not be hurry to replace the IC, as this may result in additional damage to a number of integrated circuits. to find the fault should be careful visual inspection first, mainly the poor contact, short circuit elements, fracture lines. Good circuit for a newly installed check the solder splashes, lines do not separate the transistor pin inserted ...

JFET can be seen as an NPN-type transistor, the gate G corresponds to the base b, the corresponding collector drain D c, S corresponds to the source emitter e. So as long as the measurement as measured transistor PN junction, the reverse resistor. The multimeter dial in the R 100 block, with black pen then one of FET electrodes, then the red pen are the other two poles, when there were two low re...

Serial Peripheral Interface SPI (Serial Peripheral Interface) bus technology is Motorola has introduced a synchronous serial interface. Motorola produced the vast majority of MCU (microcontroller) are equipped with SPI hardware interface, such as the 68 series MCU. Three-wire SPI bus is a synchronous bus, because of its strong hardware functions, so the SPI-related software is quite simple so that...

High frequency clock signal is the key to signal the circuit board, the higher the frequency of the clock on the wiring requirements are also higher. common design rules are as follows: (1) clock source to the load of the connection as short as possible, lines should be wide. (2) Note that different clocks, clocks and 15 datasheet and other signal interference between, avoid parallel wiring of several signal...

The drive has been used to pay an AC voltage inverter, AC inverter has an AC current, to pay an AC inverter and 10 datasheet and pulse width modulation (PWM) inverter. (1) pay an AC inverter is directly transformed into the AC grid voltage and 10 price and frequency are adjustable alternating current, the circuit constitutes a simple, high efficiency, low-speed large-capacity when the economy is generally only reach the high...

Guide the electrode is the result of some processing of the metal plate or metal wire, metal net, with the electrode guide bio-electrical signals, is in direct contact with the electrode electrolyte solution, such as conductive paste, human sweat, or tissue fluid. Thus forming a metal-electrolyte solution interface. By the metal immersed in a solution containing the metal ions in the form of the s...