Introduction The radio is the receiver of radio broadcasting. The high-frequency modulated weak signal input by the receiving antenna is amplified, frequency-converted and detected, and then restore...

Invention Professor Alex Zeto from Berkeley said that the nano radio they developed was 100 billion times smaller than the first commercial radios. Although the nano radio is currently only set as a...

Book Introduction Introduce how to build a complex and efficient transistor radio circuit at low cost. It introduces complete circuit examples in detail, gives detailed circuit schematics, and gives...

Origin and type The "stone radio" originated from the early geophone components that were directly made of natural ore. The ore commonly used is pyrite crystals. When in use, a metal probe is used t...

Announcement time In 1998, it was approved and released by the National Scientific and Technical Terms Review Committee. Source The first edition of "Terms of Electrical Engineering".

Compilation of History Publishing BackgroundIn the 1950s, Chinese dictionaries published in the 1950s all used simple classical Chinese to interpret meanings, which broke away from the reality of th...

Book preparation process RevisionsAfter the publication of "Modern Chinese Dictionary (5th Edition)" in 2005, with the continuous advancement of China’s reform and opening up, political and economic...

Announcement time In 2019, it will be approved and released by the National Scientific and Technical Terms Review Committee. Source The third edition of "Terms of Physics".

Introduction Ampere-turn is the unit of magnetic potential Fm, which can be calculated according to the required core magnetic flux Ф and the total magnetic resistance Rm of the core magnetic circui...

Basic information Chinese name: cable television networkEnglish name: cable television network;CATV networkDefinition: Use optical cable or the same A shaft cable is used to transmit broadcast TV si...

Basic information Publisher: China Radio and Television Press; First Edition (January 1, 2003)Series title: Digital Radio and Television Technical Book DepartmentBody language: Simplified ChineseForm...

Concept MOS-level chemical reagent is the abbreviation of "Metal-oxide-semiconductor" (Metal-oxide-semiconductor) circuit special pure reagent, which is suitable for large-scale integrated circuits...

Introduction The book is divided into 13 chapters, which comprehensively and systematically introduce the front-end system, transmission system, and the entire digital TV information transmission lin...

Introduction With the continuous improvement of satellite broadcasting and digital technology in my country’s cable television (CATV) business, it is moving towards the needs of the future informati...

Concept It is represented by the symbol "n"; its international standard unit is rps (revolutions per second) or rpm (revolutions per minute), and it is also expressed as RPM (revolutions per minute...