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
    • 3. 发明公开
    • Frequency tracking oscillator and method of operation
    • Frequenznachlaufoszillator und Betriebsverfahrendafür
    • EP1239584A2
    • 2002-09-11
    • EP02251662.9
    • 2002-03-08
    • RF MONOLITHICS, INC.
    • Ash, Darrell Lee
    • H03B5/32
    • H03B5/326
    • To secure the benefits of a low phase noise, wide tune range SAW (Surface Acoustic Wave) oscillator in noisy environments, a tunable two port SAW resonator circuit (102) is employed within the oscillator in differential mode, connected to a differential amplifier circuit (110) to create a differential oscillator (100). In the absence of any need for ground or power supply voltage level references, low phase noise/edge jitter is maintained even in hostile environments while providing sufficient tune range to track small frequency changes. The resulting differential mode SAW oscillator is thus well-suited for use, for instance, in clock recovery within SONET applications.
    • 为了确保在噪声环境中的低相位噪声,宽调谐范围SAW(表面声波)振荡器的优点,在差分模式下在振荡器内采用可调谐的两端口SAW谐振电路(102),连接到差分放大器电路 110)以产生差分振荡器(100)。 在不需要接地或电源电压电平基准的情况下,即使在恶劣环境中也能保持低相位噪声/边缘抖动,同时提供足够的调谐范围来跟踪小的频率变化。 因此,所得到的差分模式SAW振荡器非常适用于例如SONET应用中的时钟恢复。
    • 4. 发明公开
    • Saw oscillator and method of operation
    • Oberflächenwellenoszillatorund Betriebsverfahrendafür
    • EP1239583A2
    • 2002-09-11
    • EP02251661.1
    • 2002-03-08
    • RF MONOLITHICS, INC.
    • Ash, Darrell Lee
    • H03B5/32
    • H03B5/326
    • A two port, single pole SAW resonator (200) is employed for a local oscillator (100) to eliminate the secondary frequency responses of the prior art without adding additional inductances and capacitances within an amplifier stage (101). The stray capacitance (C 01 ,C 02 ) which is seen within the equivalent circuit of the single pole, two port SAW resonator (200) at a port (201,202) for the SAW resonator is tuned out by coupling an appropriately sized inductance (L 01 ,L 02 ) in parallel with the stray capacitance (C 01 ,C 02 ). Access to the series resonator (L M , C M ,R M ) within the SAW resonator equivalent circuit (200) is thus provided, permitting direct tuning of the resonant frequency for the SAW resonator. The high Q of the SAW resonator (200) ensures low phase noise/edge jitter, while direct tuning of the series resonator enables a wide tune range. The tunable SAW resonator circuit (102) is thus well-suited for use in a low phase noise tunable oscillator employed, for instance, in clock recovery within SONET applications.
    • 本体振荡器(100)采用双端口单极SAW谐振器(200),以消除现有技术的次级频率响应,而不会在放大器级(101)内增加额外的电感和电容。 在用于SAW谐振器的端口(201,202)处的单极两端SAW谐振器(200)的等效电路内观察到的寄生电容(C01,C02)通过耦合适当尺寸的电感(L01,L02 )与杂散电容(C01,C02)并联。 因此提供了在SAW谐振器等效电路(200)内的串联谐振器(LM,CM,RM)的访问,允许对SAW谐振器的谐振频率进行直接调谐。 SAW谐振器(200)的高Q确保了低相位噪声/边缘抖动,而串联谐振器的直接调谐可实现较宽的调谐范围。 因此,可调谐SAW谐振器电路(102)非常适合用于例如在SONET应用中的时钟恢复中使用的低相位噪声可调谐振荡器。