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Posted by eddy2019 | Aug 10, 2019 @ 02:00 AM | 1,114 Views
Simply speaking, a device that requires an (electrical) source is called an active device, and a device that does not require an (electrical) source is a passive device. Active devices are typically used for signal amplification, conversion, etc., passive devices are used for signal transmission, or "signal amplification" by directionality. Capacitors, resistors, and inductors are passive devices, and ICs, modules, etc. are all active devices. (Commonly speaking, it is the active components, such as triodes, that require a power supply to display their characteristics. A passive component is called without a power supply.)

1. Basic definition of passive components
If an electronic component operates without any form of power supply inside it, the device is called a passive device.

From the nature of the circuit, passive components have two basic characteristics:

(1) It either consumes electrical energy or converts electrical energy into other forms of other energy.

(2) Just input the signal and it will work without external power supply.

2. Basic definition of active devices
If an electronic component has a power supply inside it, the device is called an active device.

From the perspective of circuit properties, active devices have two basic characteristics:

(1) It also consumes electricity itself.

(2) In addition to the input signal, there must be an external power supply to work properly.

It can be seen that the active device and...Continue Reading
Posted by eddy2019 | Aug 08, 2019 @ 04:42 AM | 765 Views
2019 Global Industrial Electronics Chip Market Analysis, Electronics and Electronics Applications, Competitive Strategy Report

2019 Global Industrial Electronics Chip Market Analysis, Electronics and Electronics Applications, Competitive Strategy Report

The global "Industrial Electronics Chip Market 2019" report is a meticulous study of the global industrial electronics chip market, depicting the most advanced details on the market. It also predicts growth in the coming years. Industrial electronic chip market analysis, scale, regional outlook, competitive strategy and forecast in 2025

The main players in the global industrial electronics chip market are Intel, Qualcomm, Samsung Electronics, SK Hynix, Micron Technology, Toshiba,Texas Instruments, Broadcom, STMicroelectronics, Media Tek, Renesas, SanDisk, Infibeam, Avago Terchnologies, NXP Advance Micro Devices (AMD), Sony, Freescale Semiconductor, nVidia, Marvell Technologies Group, ON Semiconductor, Analog Devices, Apple, HiSilicon, ROHM.</p>

Main product segmentation - digital chip, analog chip

Application categories and market segments - Automotive, Mmedical Electronics, Military, Aerospace, and others are estimated with the help of in-depth market research. It also highlights the impact of Porter's five forces on market expansion. The industrial electronic chip market research analyzes the global industrial electronic chip market. In addition,...Continue Reading
Posted by eddy2019 | Jul 29, 2019 @ 07:22 AM | 1,783 Views
A microcontroller is a single-chip microcomputer that integrates the main part of a microcomputer on a single chip. Microcontrollers were born in the mid-1970s. After more than 20 years of development, their cost is getting lower and lower, and their performance is getting stronger and stronger, which makes their applications ubiquitous in all fields. Examples include motor control, bar code readers/scanners, consumer electronics, gaming equipment, telephones, HVAC, building security and access control, industrial control and automation, and white goods (washing machines, microwave ovens).

The role of the microcontroller
In industrial applications, the role of the microcontroller is to control and coordinate the actions of the entire device, usually requiring a program counter (PC), an instruction register (IR), an instruction decoder (ID), timing and control circuitry, and a pulse source. Interrupts, etc. are completed together.

According to the role played by the controller in the work, the main types of microcontrollers are as follows:

1, command controller

The instruction controller is a very important part of the controller. It needs to complete operations such as fetching instructions and analyzing instructions, and then handing it over to the execution unit (ALU or FPU) for execution, and also to form the address of the next instruction.

2, timing controller

The purpose of the timing controller is to provide control signals for each instruction in...Continue Reading
Posted by eddy2019 | Jul 25, 2019 @ 08:12 AM | 3,454 Views
Personal production circuit board method one:

1. Cut the copper plate into the dimensions required for the circuit diagram.

2. Place the wax paper on the steel plate, engrave the circuit diagram on the 1:1 wax paper with a pen, and cut the circuit diagram engraved on the wax paper according to the board size. The cut wax paper was placed on a printed copper plate. Take a small amount of paint and talcum powder and mix them into a thick, suitable print. Use a brush to pick up the print and apply it evenly over the wax paper. Repeat the board several times to print the circuit. This stereotype can be reused for small batch production.

3. An etching solution was prepared in which the ratio of potassium chlorate to 15 ml of 15% hydrochloric acid was 1%, and etching was performed on the plate to be etched.

4. Rinse the etched printed circuit board repeatedly with water. Wipe off the paint with banana water and wash several times to clean the printed circuit board without leaving a corrosive solution. Apply a layer of rosin solution for drying and drilling.

Personal production circuit board method two:

There are many ways to make printed circuit boards in amateur conditions, but this is not time consuming, or the "process" is complex or of poor quality. The method of making a printed circuit board is one of the better overall effects, as follows:

1. Plate layout. The pads in the figure are indicated by dots, and the wires can be...Continue Reading
Posted by eddy2019 | Jun 20, 2019 @ 10:01 PM | 3,096 Views
The 8087 chip provided fast floating point arithmetic for the original IBM PC and became part of the x86 architecture used today. One unusual feature of the 8087 is it contained a multi-level ROM (Read-Only Memory) that stored two bits per transistor, twice as dense as a normal ROM. Instead of storing binary data, each cell in the 8087's ROM stored one of four different values, which were then decoded into two bits. Because the 8087 required a large ROM for microcode1 and the chip was pushing the limits of how many transistors could fit on a chip, Intel used this special technique to make the ROM fit. In this article, I explain how Intel implemented this multi-level ROM.

Intel introduced the 8087 chip in 1980 to improve floating-point performance on the 8086 and 8088 processors. Since early microprocessors operated only on integers, arithmetic with floating point numbers was slow and transcendental operations such as trig or logarithms were even worse. Adding the 8087 co-processor chip to a system made floating point operations up to 100 times faster. The 8087's architecture became part of later Intel processors, and the 8087's instructions (although now obsolete) are still a part of today's x86 desktop computers.

I opened up an 8087 chip and took die photos with a microscope yielding the composite photo below. The labels show the main functional blocks, based on my reverse engineering. (Click here for a larger image.) The die of the 8087 is complex, with 40,000...Continue Reading