1) triple conversion
三次变频
1.
Comparing the dual conversion mechanism and the triple conversion mechanism,the dual conversion mechanism is more adaptable for implementing lower spurious outputs of signal independent at 70 MHz and miniaturization.
通过比较,证明了二次变频方案比三次变频方案在小型化设计上更有优势,对第一、二本振频率合成方案进行相位噪声分析,并简单介绍了模块内部微带放大、滤波电路的组成。
3) one time frequency converting
一次变频
1.
This paper focuses on the three major technical obstacles encountered in the process of designing the VHF SSB mobile receiver and presents a design program using one time frequency converting,dual-PLL.
文中重点叙述如何解决甚高频单边带移动接收机设计所遇到的三大技术障碍,同时介绍了采用一次变频双锁相环的设计方案,得到了研制出的性能样机的各项指标。
4) twice frequency-conversion
两次变频
1.
Using twice frequency-conversion technique and single local oscillator(LO),L-band 500MHz bandwidth signal is up-converted to Ka-band.
该模块采用单一本振源两次变频方案,将L频段500MHz带宽信号上变频至Ka频段。
5) double-conversion
二次变频
1.
This paper introduces a novel scheme of frequency conversion,using single local oscillator to achieve double-conversion.
介绍了一种新型的变频方案,采用单本振源即可实现二次变频,还能保留传统二次变频方案的优点,简化了本振源的实现,有利于小型化和集成化。
2.
This paper begins with the comparison of single-conversion receiver and double-conversion receiver architectures, from.
本文通过比较一次变频接收机和二次变频接收机这两种不同的调谐器架构,引出了在数字电视调谐器中使用上变频混频器的基本背景和必要性。
6) three great changes
三次巨变
1.
Taking modernizations at the core, the three great changes in the 20th century not only surmount two thousand years changes of the feudal society of China, but also surmount the historical course of the western capitalistic modernization.
以现代化为核心的 2 0世纪三次巨变 ,不仅超越了中国两千年封建社会变迁 ,而且也超越了西方资本主义现代化的历史进程。
补充资料：1,3,5-三嗪-2,4,6-三烯三次氮基六甲醇
CAS：531-18-0
分子式：C9H18N6O6
分子质量：306.27
中文名称：1,3,5-三嗪-2,4,6-三烯三次氮基六甲醇
六甲醇基三聚氰胺
英文名称：(1,3,5-triazine-2,4,6-triyltrinitrilo)hexakis-Methanol
(s-triazine-2,4,6-triyltrinitrilo)hexamethanol
cilag 61
分子式：C9H18N6O6
分子质量：306.27
中文名称：1,3,5-三嗪-2,4,6-三烯三次氮基六甲醇
六甲醇基三聚氰胺
英文名称：(1,3,5-triazine-2,4,6-triyltrinitrilo)hexakis-Methanol
(s-triazine-2,4,6-triyltrinitrilo)hexamethanol
cilag 61
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条