在压电元件≡中有人把晶振比喻成“心脏”，可能有些人会觉得不可思议，会觉得是我们在夸夸奇谈，我很理解有这种想法的人，因为在电子PCB板上并不▲是只有这种元件，还有很多包括像电容、电阻、二极管、IC之类的元器件，但是我想说的是没有晶振这颗元▂件的带动，其它的元件器都形同虚设。

改革开放随之以后，中国一直在快马加鞭的追赶时代的脚步，从以往不能造就航天工具和核武器，到如今能独立完成，不在需要别的国帮助。在早期，电子产品的使用在中国是少之又少的，随着人们生活水ξ　平的提高，人们对电子产品的需求不在局限于电视机，电话了。这样一来便加快了，人们对晶振的需求〗量。晶振简单可区分为贴片晶振和插』件晶振，但是许多生产工厂由于产品的要求，都会使用高稳晶振，与此使得它的应用领域不断的壮＠ 大。但是不免存在些许使用者在对高稳晶振压控功⌒能的使用方法与要求有一定的盲区，为了彻底解决这个困扰使用者很久的问题，深圳市康华尔电子有限公司研▽发团队，综合研究，整理出晶振压控功能的特性描述与简要的说明的独家见解，希望同广大用户朋≡友和同行爱好者们共同分▃享、学习、探讨。

晶振频率随压控端控制电压的变化而变化的特性叫做压控特性。一般晶振在长期运行中，由于各▲种因素的影响，晶振工作频率会产生一定的波动或老化漂移。为了保证晶振工作频率达到系统运行要求，在频率超出运行要求时必须进行调节，一般多采用电调的方法来实现。

CS325-19.069928MABJ-UT	Citizen Finedevice Co Ltd	CRYSTAL 19.069928MHZ 18PF SMD	CS325	MHz Crystal	19.069928MHz
CS325-19.069928MABJ-UT	Citizen Finedevice Co Ltd	CRYSTAL 19.069928MHZ 18PF SMD	CS325	MHz Crystal	19.069928MHz
CS325-18.9375MABJ-UT	Citizen Finedevice Co Ltd	CRYSTAL 18.9375MHZ 18PF SMD	CS325	MHz Crystal	18.9375MHz
CS325-18.9375MABJ-UT	Citizen Finedevice Co Ltd	CRYSTAL 18.9375MHZ 18PF SMD	CS325	MHz Crystal	18.9375MHz
CS325-18.9375MABJ-UT	Citizen Finedevice Co Ltd	CRYSTAL 18.9375MHZ 18PF SMD	CS325	MHz Crystal	18.9375MHz
CS325-52.000MABJ-UT	Citizen Finedevice Co Ltd	CRYSTAL 52.0000MHZ 18PF SMD	CS325	MHz Crystal	52MHz
CS325-52.000MABJ-UT	Citizen Finedevice Co Ltd	CRYSTAL 52.0000MHZ 18PF SMD	CS325	MHz Crystal	52MHz
CS325-52.000MABJ-UT	Citizen Finedevice Co Ltd	CRYSTAL 52.0000MHZ 18PF SMD	CS325	MHz Crystal	52MHz
CS325-20.500MABJ-UT	Citizen Finedevice Co Ltd	CRYSTAL 20.5000MHZ 18PF SMD	CS325	MHz Crystal	20.5MHz
CS325-20.500MABJ-UT	Citizen Finedevice Co Ltd	CRYSTAL 20.5000MHZ 18PF SMD	CS325	MHz Crystal	20.5MHz
CS325-20.500MABJ-UT	Citizen Finedevice Co Ltd	CRYSTAL 20.5000MHZ 18PF SMD	CS325	MHz Crystal	20.5MHz
CS325-37.050MABJ-UT	Citizen Finedevice Co Ltd	CRYSTAL 37.0500MHZ 18PF SMD	CS325	MHz Crystal	37.05MHz
CS325-37.050MABJ-UT	Citizen Finedevice Co Ltd	CRYSTAL 37.0500MHZ 18PF SMD	CS325	MHz Crystal	37.05MHz
CS325-37.050MABJ-UT	Citizen Finedevice Co Ltd	CRYSTAL 37.0500MHZ 18PF SMD	CS325	MHz Crystal	37.05MHz
CM41532768EZFT	Citizen Finedevice Co Ltd	CRYSTAL 32.7680KHZ 12.5PF SMD	CM415	kHz Crystal (Tuning Fork)	32.768kHz
CM41532768EZFT	Citizen Finedevice Co Ltd	CRYSTAL 32.7680KHZ 12.5PF SMD	CM415	kHz Crystal (Tuning Fork)	32.768kHz
CM41532768EZFT	Citizen Finedevice Co Ltd	CRYSTAL 32.7680KHZ 12.5PF SMD	CM415	kHz Crystal (Tuning Fork)	32.768kHz
CS325-44.000MABJ-UT	Citizen Finedevice Co Ltd	CRYSTAL 44.0000MHZ 18PF SMD	CS325	MHz Crystal	44MHz
CS325-44.000MABJ-UT	Citizen Finedevice Co Ltd	CRYSTAL 44.0000MHZ 18PF SMD	CS325	MHz Crystal	44MHz
CS325-44.000MABJ-UT	Citizen Finedevice Co Ltd	CRYSTAL 44.0000MHZ 18PF SMD	CS325	MHz Crystal	44MHz
CS325-53.125MABJ-UT	Citizen Finedevice Co Ltd	CRYSTAL 53.1250MHZ 18PF SMD	CS325	MHz Crystal	53.125MHz
CS325-53.125MABJ-UT	Citizen Finedevice Co Ltd	CRYSTAL 53.1250MHZ 18PF SMD	CS325	MHz Crystal	53.125MHz
CS325-53.125MABJ-UT	Citizen Finedevice Co Ltd	CRYSTAL 53.1250MHZ 18PF SMD	CS325	MHz Crystal	53.125MHz
CS325-40.000MABJ-UT	Citizen Finedevice Co Ltd	CRYSTAL 40.0000MHZ 18PF SMD	CS325	MHz Crystal	40MHz
CS325-40.000MABJ-UT	Citizen Finedevice Co Ltd	CRYSTAL 40.0000MHZ 18PF SMD	CS325	MHz Crystal	40MHz
CS325-40.000MABJ-UT	Citizen Finedevice Co Ltd	CRYSTAL 40.0000MHZ 18PF SMD	CS325	MHz Crystal	40MHz
CS325-16.384MABJ-UT	Citizen Finedevice Co Ltd	CRYSTAL 16.3840MHZ 18PF SMD	CS325	MHz Crystal	16.384MHz
CS325-16.384MABJ-UT	Citizen Finedevice Co Ltd	CRYSTAL 16.3840MHZ 18PF SMD	CS325	MHz Crystal	16.384MHz
CS325-16.384MABJ-UT	Citizen Finedevice Co Ltd	CRYSTAL 16.3840MHZ 18PF SMD	CS325	MHz Crystal	16.384MHz
CS325H-44.000MEDQ-UT	Citizen Finedevice Co Ltd	CRYSTAL 44.0000MHZ 10PF SMD	CS325H	MHz Crystal	44MHz
CS325H-44.000MEDQ-UT	Citizen Finedevice Co Ltd	CRYSTAL 44.0000MHZ 10PF SMD	CS325H	MHz Crystal	44MHz
CS325H-44.000MEDQ-UT	Citizen Finedevice Co Ltd	CRYSTAL 44.0000MHZ 10PF SMD	CS325H	MHz Crystal	44MHz
CS325H-40.000MEDQ-UT	Citizen Finedevice Co Ltd	CRYSTAL 40.0000MHZ 10PF SMD	CS325H	MHz Crystal	40MHz
CS325H-40.000MEDQ-UT	Citizen Finedevice Co Ltd	CRYSTAL 40.0000MHZ 10PF SMD	CS325H	MHz Crystal	40MHz
CS325H-40.000MEDQ-UT	Citizen Finedevice Co Ltd	CRYSTAL 40.0000MHZ 10PF SMD	CS325H	MHz Crystal	40MHz
HC-49/U-S4000000ABJB	Citizen Finedevice Co Ltd	CRYSTAL 4.0000MHZ 18PF T/H	HC49US	MHz Crystal	4MHz
HC-49/U-S6000000ABJB	Citizen Finedevice Co Ltd	CRYSTAL 6.0000MHZ 18PF T/H	HC49US	MHz Crystal	6MHz
HC-49/U-S3686400ABJB	Citizen Finedevice Co Ltd	CRYSTAL 3.6864MHZ 18PF T/H	HC49US	MHz Crystal	3.6864MHz
CFV-206100000AZFB	Citizen Finedevice Co Ltd	CRYSTAL 100.0000KHZ 12.5PF T/H	CFV-206	kHz Crystal (Tuning Fork)	100kHz
CFV-20640000AZFB	Citizen Finedevice Co Ltd	CRYSTAL 40.0000KHZ 12.5PF T/H	CFV-206	kHz Crystal (Tuning Fork)	40kHz
CFV-20632000DZFB	Citizen Finedevice Co Ltd	CRYSTAL 32.0000KHZ 12.5PF T/H	CFV-206	kHz Crystal (Tuning Fork)	32kHz
HC-49/U-S19660800ABJB	Citizen Finedevice Co Ltd	CRYSTAL 19.6608MHZ 18PF T/H	HC49US	MHz Crystal	19.6608MHz
HC-49/U-S28636360ABJB	Citizen Finedevice Co Ltd	CRYSTAL 28.63636MHZ 18PF T/H	HC49US	MHz Crystal	28.63636MHz

单从压控特性指标来说，在相同压控电压变化范围内频率调节范围越大越好，但对高稳晶振来々说，因其频率稳定度高，频率短时期内的频率变化很小，不需要经常很大的调节量；另外，过大的频率调节范围会对ξ　其它稳定度方面的指标（如温度稳定度）构成一♀定的影响，需根据用户要求◆综合考虑多方面指标，以保证器件与整个系统性¤能的平衡与合理。

关于控制晶振压控端的控制电压，对于需要使用到此功能的用户来说，其控︼制电压来源于用户的系统设计，大多用户采用智能受控的精密DAC电路或数字电位器（位数越高频率控制精度越高∮），也有少数采用传统的人工调节机械电位器，不论采用哪种ω控制方式都应注意控制电压纹波与响应时间，当输入端干扰过大时会使晶振频率抖动，相噪恶化。通常情况下晶振厂商在晶◢振压控输入端的内部已设计了一定频响范围内的低通滤波，所以如果晶振工作环境有较强干扰，可在压控端〇外部增加一个适度频响的低通滤波，如果干扰不大外部低通器件不焊即可。

HC-49/U-S48000000ABJB	Citizen Finedevice Co Ltd	CRYSTAL 48.0000MHZ 18PF T/H	HC49US	MHz Crystal	48MHz
HC-49/U-S32000000ABJB	Citizen Finedevice Co Ltd	CRYSTAL 32.0000MHZ 18PF T/H	HC49US	MHz Crystal	32MHz
HC-49/U-S7680000ABJB	Citizen Finedevice Co Ltd	CRYSTAL 7.6800MHZ 18PF T/H	HC49US	MHz Crystal	7.68MHz
HC-49/U-S3579545ABJB	Citizen Finedevice Co Ltd	CRYSTAL 3.579545MHZ 18PF T/H	HC49US	MHz Crystal	3.579545MHz
CFV-20665536AZFB	Citizen Finedevice Co Ltd	CRYSTAL 65.5360KHZ 12.5PF T/H	CFV-206	kHz Crystal (Tuning Fork)	65.536kHz
CFV-20636000AZFB	Citizen Finedevice Co Ltd	CRYSTAL 36.0000KHZ 12.5PF T/H	CFV-206	kHz Crystal (Tuning Fork)	36kHz
HC-49/U-S14318180ABKB	Citizen Finedevice Co Ltd	CRYSTAL 14.31818MHZ 20PF T/H	HC-49US	MHz Crystal	14.31818MHz
CFS-20632768EZYB	Citizen Finedevice Co Ltd	CRYSTAL 32.7680KHZ 7PF T/H	CFS-206	kHz Crystal (Tuning Fork)	32.768kHz
CM309E10240000ABJT	Citizen Finedevice Co Ltd	CRYSTAL 10.2400MHZ 18PF SMD	CM309E	MHz Crystal	10.24MHz
CM309E10240000ABJT	Citizen Finedevice Co Ltd	CRYSTAL 10.2400MHZ 18PF SMD	CM309E	MHz Crystal	10.24MHz
CM309E10240000ABJT	Citizen Finedevice Co Ltd	CRYSTAL 10.2400MHZ 18PF SMD	CM309E	MHz Crystal	10.24MHz
CFV-20668500DZFB	Citizen Finedevice Co Ltd	CRYSTAL 68.5000KHZ 12.5PF T/H	CFV-206	kHz Crystal (Tuning Fork)	68.5kHz
CFV-20668503DZFB	Citizen Finedevice Co Ltd	CRYSTAL 68.5030KHZ 12.5PF T/H	CFV-206	kHz Crystal (Tuning Fork)	68.5kHz
CFV-20640003DZFB	Citizen Finedevice Co Ltd	CRYSTAL 40.0030KHZ 12.5PF T/H	CFV-206	kHz Crystal (Tuning Fork)	40kHz
CFV-20660003DZFB	Citizen Finedevice Co Ltd	CRYSTAL 60.0030KHZ 12.5PF T/H	CFV-206	kHz Crystal (Tuning Fork)	60kHz
CFV-20660000DZFB	Citizen Finedevice Co Ltd	CRYSTAL 60.0000KHZ 12.5PF T/H	CFV-206	kHz Crystal (Tuning Fork)	60kHz
CFV-20640000DZFB	Citizen Finedevice Co Ltd	CRYSTAL 40.0000KHZ 12.5PF T/H	CFV-206	kHz Crystal (Tuning Fork)	40kHz
CM309A16.257MABJT	Citizen Finedevice Co Ltd	CRYSTAL 16.2570MHZ 18PF SMD	CM309A	MHz Crystal	16.257MHz
CM309A16.257MABJT	Citizen Finedevice Co Ltd	CRYSTAL 16.2570MHZ 18PF SMD	CM309A	MHz Crystal	16.257MHz
CM309S33.8688MABJTR	Citizen Finedevice Co Ltd	CRYSTAL 33.8688MHZ 18PF SMD	CM309S	MHz Crystal	33.8688MHz
CM309S33.8688MABJTR	Citizen Finedevice Co Ltd	CRYSTAL 33.8688MHZ 18PF SMD	CM309S	MHz Crystal	33.8688MHz
HC-49/U-S5990400ABJB	Citizen Finedevice Co Ltd	CRYSTAL 5.9904MHZ 18PF T/H	HC49US	MHz Crystal	5.9904MHz
HC-49/U-S16257000ABJB	Citizen Finedevice Co Ltd	CRYSTAL 16.2570MHZ 18PF T/H	HC49US	MHz Crystal	16.257MHz
HC-49/U-S17734475ABJB	Citizen Finedevice Co Ltd	CRYSTAL 17.734475MHZ 18PF T/H	HC49US	MHz Crystal	17.734475MHz
HC-49/U-S16000312ABJB	Citizen Finedevice Co Ltd	CRYSTAL 16.000312MHZ 18PF T/H	HC49US	MHz Crystal	16.000312MHz
HC-49/U-S11000000ABJB	Citizen Finedevice Co Ltd	CRYSTAL 11.0000MHZ 18PF T/H	HC49US	MHz Crystal	11MHz
HC-49/U-S9000000ABJB	Citizen Finedevice Co Ltd	CRYSTAL 9.0000MHZ 18PF T/H	HC49US	MHz Crystal	9MHz
HC-49/U-S18000000ABJB	Citizen Finedevice Co Ltd	CRYSTAL 18.0000MHZ 18PF T/H	HC49US	MHz Crystal	18MHz
HC-49/U-S21477270ABJB	Citizen Finedevice Co Ltd	CRYSTAL 21.47727MHZ 18PF T/H	HC49US	MHz Crystal	21.47727MHz
HC-49/U-S15360000ABJB	Citizen Finedevice Co Ltd	CRYSTAL 15.3600MHZ 18PF T/H	HC49US	MHz Crystal	15.36MHz
HC-49/U-S6500000ABJB	Citizen Finedevice Co Ltd	CRYSTAL 6.5000MHZ 18PF T/H	HC49US	MHz Crystal	6.5MHz
HC-49/U-S24000140ABJB	Citizen Finedevice Co Ltd	CRYSTAL 24.00014MHZ 18PF T/H	HC49US	MHz Crystal	24.00014MHz
HC-49/U-S15000000ABJB	Citizen Finedevice Co Ltd	CRYSTAL 15.0000MHZ 18PF T/H	HC49US	MHz Crystal	15MHz
HC-49/U-S14318180ABJB	Citizen Finedevice Co Ltd	CRYSTAL 14.31818MHZ 18PF T/H	HC49US	MHz Crystal	14.31818MHz
HC-49/U-S13500000ABJB	Citizen Finedevice Co Ltd	CRYSTAL 13.5000MHZ 18PF T/H	HC49US	MHz Crystal	13.5MHz
HCM4916257000ABJT	Citizen Finedevice Co Ltd	CRYSTAL 16.2570MHZ 18PF SMD	HCM49	MHz Crystal	16.257MHz
HCM4916257000ABJT	Citizen Finedevice Co Ltd	CRYSTAL 16.2570MHZ 18PF SMD	HCM49	MHz Crystal	16.257MHz
HCM4916257000ABJT	Citizen Finedevice Co Ltd	CRYSTAL 16.2570MHZ 18PF SMD	HCM49	MHz Crystal	16.257MHz
HCM495990400ABJT	Citizen Finedevice Co Ltd	CRYSTAL 5.9904MHZ 18PF SMD	HCM49	MHz Crystal	5.9904MHz
HCM495990400ABJT	Citizen Finedevice Co Ltd	CRYSTAL 5.9904MHZ 18PF SMD	HCM49	MHz Crystal	5.9904MHz
HCM495990400ABJT	Citizen Finedevice Co Ltd	CRYSTAL 5.9904MHZ 18PF SMD	HCM49	MHz Crystal	5.9904MHz
HCM4910240000ABJT	Citizen Finedevice Co Ltd	CRYSTAL 10.2400MHZ 18PF SMD	HCM49	MHz Crystal	10.24MHz
HCM4910240000ABJT	Citizen Finedevice Co Ltd	CRYSTAL 10.2400MHZ 18PF SMD	HCM49	MHz Crystal	10.24MHz
HCM4910240000ABJT	Citizen Finedevice Co Ltd	CRYSTAL 10.2400MHZ 18PF SMD	HCM49	MHz Crystal	10.24MHz
HCM499830400ABJT	Citizen Finedevice Co Ltd	CRYSTAL 9.8304MHZ 18PF SMD	HCM49	MHz Crystal	9.8304MHz
HCM499830400ABJT	Citizen Finedevice Co Ltd	CRYSTAL 9.8304MHZ 18PF SMD	HCM49	MHz Crystal	9.8304MHz
HCM499830400ABJT	Citizen Finedevice Co Ltd	CRYSTAL 9.8304MHZ 18PF SMD	HCM49	MHz Crystal	9.8304MHz
HCM4948000000ABJT	Citizen Finedevice Co Ltd	CRYSTAL 48.0000MHZ 18PF SMD	HCM49	MHz Crystal	48MHz
HCM4948000000ABJT	Citizen Finedevice Co Ltd	CRYSTAL 48.0000MHZ 18PF SMD	HCM49	MHz Crystal	48MHz
HCM4948000000ABJT	Citizen Finedevice Co Ltd	CRYSTAL 48.0000MHZ 18PF SMD	HCM49	MHz Crystal	48MHz
HCM4919660800ABJT	Citizen Finedevice Co Ltd	CRYSTAL 19.6608MHZ 18PF SMD	HCM49	MHz Crystal	19.6608MHz
HCM4919660800ABJT	Citizen Finedevice Co Ltd	CRYSTAL 19.6608MHZ 18PF SMD	HCM49	MHz Crystal	19.6608MHz
HCM4919660800ABJT	Citizen Finedevice Co Ltd	CRYSTAL 19.6608MHZ 18PF SMD	HCM49	MHz Crystal	19.6608MHz
HCM4916384000ABJT	Citizen Finedevice Co Ltd	CRYSTAL 16.3840MHZ 18PF SMD	HCM49	MHz Crystal	16.384MHz
HCM4916384000ABJT	Citizen Finedevice Co Ltd	CRYSTAL 16.3840MHZ 18PF SMD	HCM49	MHz Crystal	16.384MHz

压控振荡器(VCXO)是通过调整控制端电压↑改变输出频率。一般频率调整范围为±50~±200ppm。改变外加调整电压的大小，能改变容性负载∏CL的值，从而实现频率的调整。

温补」振荡器(TCXO)是利用附件的温度补偿电路以减少环境温度对振荡频率的影响。TCXO利用热敏电阻的温度敏感↘性，当温度变化时，热敏电阻的阻值和容性负载同时发生变化，而容性负载的变化会改变振荡频率，从而实现的对振荡频率的修正

TCXO频率精度和温度特性远高于普通△振荡器，比恒温晶振差，但不需预热，功耗低，从而在野外作业，移动设备，通讯导航设备中广泛①应用。

无论是压控晶振还是温补晶振，在电路中只有一个作用，那就是↑提供稳定的频率输出。不同的是压控晶振可以通过压控端的电压微调控制输出◣的频率的高低，而温补晶振则自动根据环境温度的变化对频率输出进行◥补偿，使输∞出的频率稳定，当然一些温补晶振也带有压控端。