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调幅单波段收音机具有悠久的历史,至今仍旧是最大众化的音响产品.袖珍式调幅收音机更是销售面广,需求量大的商品.人们对袖珍式收音机的要求是既要便宜又要性能好,但两者往往是矛盾的;只有单片集成块收音机才能达到两者的统一.由于现代大规模集成技术的发展,现在已经能够把从变频、中放、检波、低放一直到功放的几十个元器件集成在一块比芝麻稍大(2.5平方毫米)的硅片上,这种单片器件具有高性
AM single-band radio has a long history, is still the most popular audio products.Card AM radio is more widely sold, demand for large products.People’s pocket radio requirements are both cheaper and better performance, But the two are often contradictory; only the monolithic integrated radio can achieve the unity of the two.As a result of the development of modern large-scale integration technology, it has been able to put from the frequency, release, detection, A component integrated in a piece of slightly larger than the sesame (2.5 mm2) silicon, this single-chip devices have high