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TD-SCDMA terminal conformance test includes three types of tests: RF index test (reference standard: 3GPPTS34.122), protocol signaling test (reference standard: 3GPPTS34.123) and other tests (refer...[Details]
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1. What is fading?
In terms of scope, fading can be roughly divided into three types: large area fading, small area fading and indoor fading. As shown in Figure 1, large area fading refers t...[Details]
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Industrial control
often requires multi-channel fault detection and multi-channel command control (this multi-task setting is very common). A single CPU chip is difficult to directly complete ...[Details]
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Abstract: CC2420 is a 2.4GHz RF chip introduced by Chipcon that complies with the IEEE 802.15.4 specification. It is used to develop ZigBee devices and products for PAN networks such as industrial ...[Details]
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When it comes to ATX power supply, people will think of two "classic" ICs: pulse width modulation chip TL494 and voltage comparator LM339. The new dedicated control chip AT2005B has the functions ...[Details]
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The growing global interest in green power has added new variables to the design of power supplies and power adapters. Designers must not only traditionally consider the design specifications requi...[Details]
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The relationship between time and frequency
There is no conceptual difficulty in understanding what happens when a steady-state DC signal is applied to a voltmeter. However, if the signal ...[Details]
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0 Introduction
As a major component of intelligent transportation, vehicle navigation and positioning has become a research hotspot recently . With the global positioning system (GPS) being u...[Details]
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Internet radio is becoming a new bright spot in the consumer electronics market, because it truly realizes high-definition listening in any environment around the world. Compared with traditional r...[Details]
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1 Introduction
DC regulated power supplies have been widely used in many industrial fields. In industrial production (such as electric welding, electroplating or DC motor speed regulation,...[Details]
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As a new generation of video coding and decoding technology, H.264 has excellent compression performance compared with traditional MPEG-2, enabling it to achieve higher-quality video transmission u...[Details]
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introduction
In modern society, portable systems (such as mobile phones and personal media players) are evolving into comprehensive multimedia and communication systems. New applications, ...[Details]
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1. Brief Introduction
Over the years, the programmable controller (hereinafter referred to as PLC) has made a leap from wiring logic to storage logic since its creation; its functions have...[Details]
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1 Introduction
As we all know, it is of great significance to rescue patients with critical emergencies and sudden death caused by accidental injuries in a few minutes. The traditional art...[Details]
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I recently looked up information online and found that some friends often hesitated for a long time between JMP and Minitab when choosing Six Sigma software. It happened that my company had just ch...[Details]
Power technology
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