道路交通燈控制器專(zhuān)用有源晶振Q3805CA00007000，有源晶振通常都為四腳或四腳以上的腳位，內(nèi)置起振芯片，是一個(gè)完整的振蕩器，只要接通電源就可以起振，大類(lèi)稱(chēng)之為主動(dòng)元器件。無(wú)源晶體的腳位通常都是四腳以下包含四腳，它的工作原理即是在一個(gè)反相放大器的兩端接入晶振，再有兩個(gè)電容分別接到晶振的兩端，每個(gè)電容的另一端再接地，這兩個(gè)電容串聯(lián)的容量值等于負(fù)載電容，請(qǐng)注意一般IC的引腳都有等效輸入電容，這個(gè)不能忽略。

Product Number	愛(ài)普生晶振	Frequency	LxWxH	Output Wave	Supply Voltage	Ope Temperature
Q3805CA00006300	EG-2121CA	156.250000 MHz	7.00 x 5.00 x 1.20 mm	LV-PECL	2.375 to 2.625 V	0 to 70 °C
Q3805CA00006400	EG-2121CA	133.000000 MHz	7.00 x 5.00 x 1.20 mm	LV-PECL	2.375 to 2.625 V	-5 to 85 °C
Q3805CA00006500	EG-2121CA	125.000000 MHz	7.00 x 5.00 x 1.20 mm	LV-PECL	2.375 to 2.625 V	0 to 70 °C
Q3805CA00006600	EG-2121CA	159.375000 MHz	7.00 x 5.00 x 1.20 mm	LV-PECL	2.375 to 2.625 V	0 to 70 °C
Q3805CA00006700	EG-2121CA	230.000000 MHz	7.00 x 5.00 x 1.20 mm	LV-PECL	2.375 to 2.625 V	0 to 70 °C
Q3805CA00006800	EG-2121CA	350.000000 MHz	7.00 x 5.00 x 1.20 mm	LV-PECL	2.375 to 2.625 V	0 to 70 °C
Q3805CA00006900	EG-2121CA	150.000000 MHz	7.00 x 5.00 x 1.20 mm	LV-PECL	2.375 to 2.625 V	-5 to 85 °C
Q3805CA00007000	EG-2121CA	156.250000 MHz	7.00 x 5.00 x 1.20 mm	LV-PECL	2.375 to 2.625 V	0 to 70 °C
Q3805CA00007100	EG-2121CA	155.520000 MHz	7.00 x 5.00 x 1.20 mm	LV-PECL	2.375 to 2.625 V	0 to 70 °C
Q3805CA00007200	EG-2121CA	62.500000 MHz	7.00 x 5.00 x 1.20 mm	LV-PECL	2.375 to 2.625 V	0 to 70 °C
Q3805CA00007300	EG-2121CA	328.710900 MHz	7.00 x 5.00 x 1.20 mm	LV-PECL	2.375 to 2.625 V	0 to 70 °C
Q3805CA00007400	EG-2121CA	87.500000 MHz	7.00 x 5.00 x 1.20 mm	LV-PECL	2.375 to 2.625 V	0 to 70 °C
Q3805CA00007500	EG-2121CA	124.416000 MHz	7.00 x 5.00 x 1.20 mm	LV-PECL	2.375 to 2.625 V	0 to 70 °C
Q3805CA00007600	EG-2121CA	166.628600 MHz	7.00 x 5.00 x 1.20 mm	LV-PECL	2.375 to 2.625 V	0 to 70 °C
Q3805CA00007700	EG-2121CA	156.250000 MHz	7.00 x 5.00 x 1.20 mm	LV-PECL	2.375 to 2.625 V	-5 to 85 °C
Q3805CA00007800	EG-2121CA	312.500000 MHz	7.00 x 5.00 x 1.20 mm	LV-PECL	2.375 to 2.625 V	0 to 70 °C
Q3805CA00007900	EG-2121CA	155.520000 MHz	7.00 x 5.00 x 1.20 mm	LV-PECL	2.375 to 2.625 V	0 to 70 °C
Q3805CA00008000	EG-2121CA	140.000000 MHz	7.00 x 5.00 x 1.20 mm	LV-PECL	2.375 to 2.625 V	0 to 70 °C
Q3805CA00008100	EG-2121CA	78.125000 MHz	7.00 x 5.00 x 1.20 mm	LV-PECL	2.375 to 2.625 V	0 to 70 °C
Q3805CA00008200	EG-2121CA	200.000000 MHz	7.00 x 5.00 x 1.20 mm	LV-PECL	2.375 to 2.625 V	0 to 70 °C
Q3805CA00008300	EG-2121CA	124.400000 MHz	7.00 x 5.00 x 1.20 mm	LV-PECL	2.375 to 2.625 V	0 to 70 °C

相位噪聲和抖動(dòng)是對(duì)同一種現(xiàn)象的兩種不同的定量方式，是對(duì)短期穩(wěn)定度的真實(shí)度量。振蕩器以及其它利用基波或諧波方式的晶體振蕩器具有最好的相位噪聲性能。采用鎖相環(huán)合成器產(chǎn)生輸出頻率的振蕩器比采用非鎖相環(huán)技術(shù)的振蕩器一般呈現(xiàn)較差的相位噪聲性能。但相對(duì)的，擁有好的相位噪聲和抖動(dòng)的同時(shí)振蕩器的設(shè)計(jì)復(fù)雜，體積大，頻率低，造價(jià)高。實(shí)際上相位噪聲和抖動(dòng)是短期頻率穩(wěn)定度的度量，所以一般越高端的晶振，即頻穩(wěn)越好的晶振，這些指標(biāo)也相應(yīng)越好。