4017 circuits

Registers are generally edge-triggered triggers, which are called register in the circuit, and the triggers are the two types of logic gates, including level-triggered and edge-triggered, the latches are level-triggered. So generally, we only call registers and latches. In time series circuits, registers are used to transmit data only on the edge of the clock (Setup Time and hold time are sufficient ), the latches can transmit data at all effective le

blocking, only the front-amplifier with superior performance and low-noise Design circuit can be used to minimize the noise impact. The amplifier with superior performance is the key. The AD855X series is a low-noise, zero-drift, single-power amplifier manufactured by AD. Its superior performance makes it the first choice for many signal detection circuits. 1. Problems with General Amplifiers Figure 1 shows a general amplification circuit. In the

electronic devices and systems, whether driving independent circuits of other devices or driving sub-units of other on-chip circuits. To ensure the maximum performance of the entire system, you must carefully design and comply with the technical specifications. Switch Voltage Regulator The switch regulator is the most efficient regulator for all DC-DC converters. Switching voltage regulators are much more

load line and long line, it is necessary to use a certain means to deal with, reduce load, to enhance the drive for the long line, the focus is to prevent the long line reflection.When there is a signal line over 40 MHz on the board, special consideration should be given to these signal lines, such as crosstalk between lines. If the frequency is higher, there will be more stringent restrictions on the length of the wiring. According to the network theory of the distribution parameter, the inter

In today's era, new technologies are emerging one after another. In the electronic field, especially in the field of automatic and intelligent control, the traditional control system composed of discrete components or digital logic circuits is replaced by the intelligent control system of single chip microcomputer. Most colleges and universities have offered SCM courses. Single-Chip Microcomputer has the advantages of small size, strong functions, low

I. PCB design PCB design plays an important role in electronic design. The quality of the circuit also determines the stability of the circuit. I am not going to introduce any tips here. I just want to talk about some details that are often ignored in the general process of using dxp to make a PCB. Before generating a PCB, we must first ensure the correctness of the schematic diagram. If the schematic diagram is not correctly connected, the subsequent components will be useless. When I draw a di

used in edvac have been used, only the engineering method for implementing logical lines and the analysis method for Logical Circuits are improved.The program memory is another masterpiece of noriman. By examining ENIAC, noriman keenly grasped its biggest weakness-without real memory. The ENIAC only has 20 buckets. Its program is plug-in and Its commands are stored in other circuits of the computer. In thi

"bipartite graph" and "spanning tree? Your understanding may not be so profound-because it is difficult for you to find some examples of your life and extract features from them. In this case, it is necessary to read some popular science books related to this knowledge. I have read a set of mathematical games (Scientific American magazine, Chinese version: Science and Technology Literature Publishing House ), it embodies abstract concepts in the fields of graph theory, logical algebra, and auto

single-chip microcomputer, such as IO port usage, input/output programming methods, Timer/Counter usage, A/D conversion, D/A conversion, etc, data storage, digital display, LCD display, timely clock, and other circuits will be combined by these small circuits for complex projects. The simple circuit step by step to understand thoroughly, Single Chip Microcomputer Development can also learn to work in the m

maximum number of two-way channels. The value range of X is 1-4095. It must be configured according to the number actually provided by the Post Office) # X25 nvc X (the number of virtual circuits configured, X cannot exceed the number actually provided by the post office; otherwise, normal data transmission will be affected) # Exit After the S0 port is configured, use the no shutdown command to activate the E0 port. If the ping to port S0 is normal,

to use multi-service networks to integrate existing DDN networks, this solution solves the problem of insufficient DDN backbone relay circuit and provides network guarantee for the evolution of the leased line network to broadband, intelligent and diversified directions. DDN Network in Yunnan Province adopts the Passport series multi-service switch of beidian network company, and integrates and transforms DDN Network Services in Kunming, the provincial capital. 1. Network Architecture before Tr

of dial-up Internet access. We recommend that you keep the remaining balance in the selection of telephone distribution boxes for future expansion. 5 fire alarm and linkage control system The Intelligent Fire Control System of Marriott Hotel is a complete fire safety and alarm system. It has four subsystems: fire detection system, central control system, fire alarm system, and fire-fighting linkage system. See. The central control system is located in the fire center on the first floor of the h

state: Each instruction in the Y86-64 program reads or modifies portions of the processor state, which is known as the programmer's visible state. Includes: program register, condition code, program status, program counter, and memory. Y86-64 Status Code:Code value 1, named AOK, indicating normal operation;The code value 2, named Hlt, indicates that the halt command is executed by the encountering device;Code value 3, named ADR, indicates that an illegal address was encountered;Code value 4,

directly. Otherwise, an electric shock will occur;The circuit ground wires connected to V mains and not grounded (ungrounded) are called "Hot ground ";The hot spot is the grounding of the power supply part that is not separated by capacitor, which is directly rectified by the mains supply (the ground that passes through the rectification bridge is the hot spot ).4. Handling Methods of different ground wires.1. numbers should be separated from analog places;In high-requirement

interface. 2. Ultrasonic emission CircuitThe four sets of Transmit circuits of the Four-channel Ultrasonic Flaw Detection card are identical and work in time-sharing mode. Generally, the four transmit circuits are set to work repeatedly, the repeat frequency and probe activation sequence are set by the user in the main interface parameter setting item of the microcomputer based on the specific conditions

First, let's talk about a * algorithm. As we all know, the * algorithm is a heuristic search. The basic form is as follows:F (x) = g (x) + h (x); Where f (x) represents the total cost required at X, while G (x) represents: the actual cost from the source point to the X point. h (x) Represents the estimated cost from X to the end point.This function is an estimate. the actual cost from X to the end is H * (x). In the entire heuristic search, we must ensure that h (x) In this way, we can understa

RF and microwaveElectromagnetic field is a unique field in the electronic information industry. The analysis and design methods are often very different from the analysis methods of general electronic circuits, and the complexity and cost of design and development are often higher, therefore, the development in the past is slow, and more is to continue the existing design or solutions in the past. With the development of electronic technologies and pr

the sound effects of personal computers and reduce noise. It was developed in 1997 and thus called ac97. In terms of computer audio requirements, it is basically similar to the consumer market, but in order to play music files with different sampling rates (8 kHz, 44.1 kHz, 48 khz, therefore, a more efficient and inexpensive solution is required, and ac97 has this feature. In the broad-based handheld device market, three formats have their own advocates: CD, MD, and MP3 players use I2S interfa

it was developed in 1997, it was called the ac''97. In terms of computer audio requirements, it is basically similar to the consumer market, but in order to play music files with different sampling rates (8 kHz, 44.1 kHz, 48 khz, so there is a need for more efficient and inexpensive solutions, and ac''97 has this feature. In the broad-based handheld device market, three formats have their own advocates: CD, MD, and MP3 players use I2S interfaces; mobile phones use PCM interfaces; the PDA with

vertical (Mode 0), horizontal (mode 1), diagonal left bottom (Mode 3), and Diagonal right bottom (Mode 4 ). Then, select the candidate prediction mode from the measurement results and calculate whether the current block has a direction. If there is directionality, the prediction model adjacent to the candidate mode is used as the candidate prediction model based on the correlation of the adjacent prediction modes. Otherwise, select mode 2 as the candidate mode. Finally, the prediction mode of a