超外差變頻器 的英文怎麼說
中文拼音 [chāowàichābiànbīnqì]
超外差變頻器
英文
super converter- 超 : Ⅰ動詞1 (越過; 高出) exceed; surpass; overtake 2 (在某個范圍以外; 不受限制) transcend; go beyo...
- 外 : Ⅰ名詞1 (外面) outside; external side 2 (外國) foreign country 3 (以外) besides; beyond; in ...
- 差 : 差Ⅰ名詞1 (不相同; 不相合) difference; dissimilarity 2 (差錯) mistake 3 [數學] (差數) differ...
- 頻 : Ⅰ形容詞(次數多) frequent Ⅱ副詞(屢次) frequently; repeatedly Ⅲ名詞1 [物理學] (物體每秒鐘振動...
- 器 : 名詞1. (器具) implement; utensil; ware 2. (器官) organ 3. (度量; 才能) capacity; talent 4. (姓氏) a surname
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In receiver system development, there are some innovations in the design of high linearity and high dynamic range, also in the circuitry realization
接收機採用兩次變頻超外差式結構設計,第一中頻為高中頻。接收機頻率合成器採用dds來實現1hz的頻率解析度。This design keep the twice frequency transform and the superheterodyne structure in analog receiver, and use programmable direct digital synthesizer ( dos ) in rf section. use this method, we can not only inherit the advantage of high sensitivity and high selection in traditional design, but also improve the automation of the equipment
該方案保留了原模擬接收機二次變頻的超外差結構,在射頻前端利用了可編程的數字頻率合成器( dds ) ,這樣既繼承了原接收機的高靈敏度,高選擇性的優點,又提高了它的接收機自動化特性。Research on cmos implementation of wlan transceiver rf front - end is done in this thesis. the transceiver uses the most used super - heterodyne architecture, its rf front - end consists of low noise amplifier, down - converter, up - converter, preamplifier, lo buffer and pll frequency synthesizer
本論文研究無線局域網收發機射頻前端的cmos實現,該收發機採用超外差式的拓撲結構,其射頻前端主要由低噪聲放大器、下變頻器、上變頻器、末前級、本地振蕩信號緩沖器和鎖相環型頻率合成器等模塊組成。
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