101 resistor

the sending side and receive the break, they need to accurately obtain the other side of the signal level, do not need external intervention. So I think this situation is suitable for floating-space input. For example, we are familiar with the i²c communication. 3 pull-up inputThe pull-up input is the use of a pull-up resistor on the input circuit. The advantage of this model is that when we do not enter anything, because of the internal pull-up

High-impedance Mode High-impedance mode is a common term in a digital circuit. It refers to an output state of a circuit. It is neither high nor low. If a high-impedance state is input into a lower-level circuit, there is no impact on the lower-level circuit, and it is the same as not connected. If you use a multimeter for testing, it may be high or low, depending on what is next to it. Essence of the high-impedance mode: When the circuit is analyzed, the high blocking state can be understo

One, push-pull output: Can output high, low level, connect digital devices; push-pull structure generally refers to two transistors are controlled by two complementary signals, always in one transistor on the time of the other cutoff. The high and low levels are determined by the IC's power supply. Push-Pull circuit is two parameters of the same transistor or MOSFET, to push-pull mode exists in the circuit, each responsible for positive and negative half-cycle of the waveform amplification task,

Carbon Film Resistor Carbon film resistance (carbon film resistance) for the earliest and most commonly used resistors, the use of vacuum spraying technology on the porcelain rod sprayed a layer of carbon film, and then the carbon film outer processing cut into a spiral pattern, according to the amount of spiral lines to set its resistance value, the more the spiral pattern indicates the greater the resistance value. Finally, the outer layer is coated

I2C pin. the I2C of the development board itself has a K pull-up resistor, so no external pull-up resistor is needed. 3) connect the gpio_9 of the development board to the int port of the chip to control interruption. 4) A gpio is required to control the reset of the chip, but the gpio foot of the touch screen interface of the Development Board has only one gpio_9. Therefore, find another gpio foot to cont

USB2.0 is backwards compatible with usb1.x, i.e. USB2.0 supports high speed, full speed, low speed USB devices(High-speed,full-speed,low-speed), while usb1.x does not support high-speed devices.So if the high-speed device is connected to the usb1.x hub, it can only work at full speed.So the speed of recognition is very important, otherwise there is no way to communicate at the desired speed.**************************************************************************************Full speed and low s

The conversion current that implements the digital signal to the analog signal is called a digital-analog (d/a) converter, referred to as the DAC (Digital-analog convert).At present, the common d/a converters are: Power resistor network D/A converter, inverted t resistor network D/A converter, weight current type D/a converter, weight capacitance network D/A converter, switch tree D/A converterFirst, the ex

amp ac-Coupled Input methodFigure 2 shows a simple solution to this common problem. Here, a resistor is connected between the input of the OP amp and the ground, providing a ground loop for the input bias current. In order to minimize the offset voltage caused by the input bias current, when using a bipolar op amp , the bias current of its two inputs should be equal, so the resistor value of the R1 should

conduction at a time, so the conduction loss is small, high efficiency. The output can either sink current to the load or pump current from the load. The push-pull output stage increases the load capacity of the circuit and increases the switching speed.Second, open-drain output: The output is equivalent to the transistor collector, to get a high-level state requires a pull-up resistor. Suitable for the current-type drive, its ability to absorb curre

This digest from: http://blog.csdn.net/kevinhg/article/details/17490273one, push-pull output: can output high, low level, connect digital devices; push-pull structure generally refers to two transistors are controlled by two complementary signals, always in one transistor on the time of the other cutoff. The high and low levels are determined by the IC's power supply. Push-pull circuit is two parameters of the same transistor or MOSFET, to push-pull mode exists in the circuit, each responsible f

The open and drain outputs do not output voltage. Low Power Supplies are grounded at ordinary times, while high power supplies are not grounded at ordinary times. If the external pull-up resistor is used, the output voltage is usually pulled to the power supply voltage of the pull-up resistor. This method is suitable when the peripheral voltage of the connection is lower than that of the single chip microco

Differences between single-chip I/O port push-pull output and open-drain output) Push-pull output: outputs high and low levels and connects to digital devices; Open-drain output: the output end is equivalent to the collector of the transistor. To obtain a high-level state, the output end must be able to pull up the resistor. It is suitable for current-type drive and has a strong ability to absorb the current (generally less than 20 mA ).The push-pul

. The component pin or the wire head to be inserted in the square hole perpendicular to the plate surface of the bread plate, should be able to feel a slight, uniform friction resistance, when the bread plate upside down, the component should be able to be clamped by the reed without falling off. The breadboard should be stored in a ventilated, dry place, especially to avoid being corroded by the electrolyte that is leaking from the battery. To keep the breadboard clean, the welded components ar

the content. 3 Capacitor buck cannot be used for high power conditions because it is unsafe. 4 capacitive buck is not suitable for dynamic load conditions. 5 Similarly, capacitance Buck does not fit the capacitive and inductive loads. 6 when DC operation is required, use half-wave rectification as far as possible. Bridge-type rectification is not recommended. And to meet the conditions of a constant load. The above is a brief introduction of the working principle of capacitive buck. I once agai

144 types of broadband op amp. The typical value of the broadband op amp is 100 MHz, which is mainly used for video amplification. (6 ). select special_function, and the components column contains 165 types of special function op amps for calling, it mainly includes the test op amp, video op amp, multiplier/divider, front amplifier and active filter. 3. Click "place basic components". Column 10 of "series" appears. Figure 10 (1). Select "Basic Virtual Component Library (basic_virtual)", as show

IO ResourcesIO is a channel for communication and control with the outside world, and FPGAs provide a rich IO and some practical features.This paper briefly extracts the main features to make reference for the design. Specific parameters refer to Handbook.Part I: Overview of IO Features-----through the flexible configuration of the software, can adapt to different electrical standards and I/O physical characteristics, can adjust the matching impedance characteristics, up and down pull resistance

line as a node parameter model, the transmission line terminal matching is not necessary.Note 1: Distributed parametric model- voltage and current in the circuit are functions of time and are related to the geometrical dimensions and spatial position of the device. NOTE 2: Lumped parameter model-the voltage between any two endpoints in the circuit and the current flowing into any of the device endpoints is fully determined, independent of the device geometry and spatial position.2.1.2 Unit Load

0 "13" 1 1 1 0 0 "14" 1 1 1 1 0 "15" 1 are not plugged in ii. Typical Application examples1. Single-button volume controllerThe single-button volume controller circuit is shown in Figure 6. The VMOs tube VT1 acts as a variable resistor and is connected to the audio device's volume potentiomete

1. GeneralizationSuch resistors are only considered in high-speed signal lines. In low-frequency cases, it is generally directly connected.This resistor has two functions, the first is impedance matching. Because the impedance of the signal source is very low, with the impedance mismatch between the signal line (for impedance matching, see detailed), after a resistor, can improve the matching situation to r

Focus:Branch Current methodSuperposition theoremThévenin theorem.Electronic technology: Digital electricity, mold power.Equivalent transformation of 2.1 resistor series-Parallel connectionThe voltage of the current source is determined by the external circuit.The equivalent relationship between the ① voltage source model and the current source model is only the external circuit, which is not equivalent to the internal power supply.When the voltage sou