会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 13. 发明授权
    • Frequency generator and communication system using the same
    • 频率发生器和通信系统使用相同
    • US07177612B2
    • 2007-02-13
    • US10901966
    • 2004-07-30
    • Takahiro NakamuraKenichi OhhataToru Masuda
    • Takahiro NakamuraKenichi OhhataToru Masuda
    • H04B7/00H04B1/18H04B1/16
    • H03F3/345H03B5/1215H03B5/1221H03B5/1228H03B5/1231H03B5/1243H03F1/30H03F3/3435H03F3/4508H03F3/50H03F2200/372H03F2203/45264
    • A frequency generator which can perform stable frequency oscillation unaffected by temperature variation.A frequency generator having a differential amplifier (1) having an LC resonance circuit (10) as a load and buffer circuits (21, 22) feeding back an output of the differential amplifier to its input, wherein a temperature coefficient converter (5) converting an output voltage of a reference voltage generator (4) and its temperature dependence to a voltage having a predetermined voltage and temperature coefficient and outputting it is provided to control bias currents IEF of emitter follower circuits to be in proportion to temperature variation. There are a characteristic in which delay time of the emitter follower circuits constructing the buffer circuits is in inverse proportion to a transconductance of transistors and a characteristic in which the transconductance is in inverse proportion to temperature and is in proportion to the bias currents IEF. An oscillation frequency stable to temperature variation can be obtained.
    • 频率发生器,可以进行不受温度变化影响的稳定频率振荡。 一种频率发生器,具有作为负载的LC谐振电路(10)的差分放大器(1)和将差分放大器的输出反馈到其输入端的缓冲电路(21,22),其中温度系数转换器(5)转换 参考电压发生器(4)的输出电压及其与具有预定电压和温度系数的电压的温度依赖性并输出,以将射极跟随器电路的偏置电流IEF控制为与温度变化成比例。 构成缓冲电路的射极跟随器电路的延迟时间与晶体管的跨导成反比的特性以及跨导与温度成反比并与偏置电流IEF成比例的特性。 可以得到温度变化稳定的振荡频率。