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2. 发明公开

EP2963825A1 OSCILLATOR CIRCUITS AND METHOD TO COMPENSATE THE FREQUENCY PULLING 有权转让
标题翻译：维多利亚州VERFAHREN ZUR KOMPENSATION DES MITZIEHEFFEKTS
公开(公告)号：EP2963825A1
公开(公告)日：2016-01-06
申请号：EP15173752.5
申请日：2015-06-25
申请人： STMicroelectronics S.r.l.
发明人： Scuderi, Angelo , Calcagno, Antonino , Scaccianoce, Salvatore
IPC分类号： H03L7/00 , H04B1/04 , H03C1/62
CPC分类号： H03L7/02 , H03B2202/06 , H03C1/62 , H03L7/18 , H04B1/0475 , H04B1/38 , H04B7/00 , H04L25/4902
摘要： Oscillator circuit comprising a local oscillator (1) configured to generate a carrier signal (2) having a tunable frequency (f t ), a first modulator (SW1) and a power amplifier (PA) couple in cascade to said local oscillator (1) and configured to generate an output signal (V OUT ), the first modulator (SW1) configured to be activated from a first modulating signal (PT) having a first frequency (f1) defining alternatively states ON and states OFF of said first modulator (SW1), the oscillator circuit further comprising:
an estimator unit (14) configured to receive the carrier signal (2) during a time window (ΔTx) and to detect an estimated frequency variation (Δf) of said carrier signal (2) during the states ON and the states OFF of said first modulator (SW1),
a compensation unit (16) comprising a second modulator (SW2) and configured to generate a compensation signal (Vcom, Icom) proportional to the estimated frequency variation (Δf) and modulated with a second modulating frequency (f2), the second modulating frequency (f2) being substantially the same of the first modulating frequency (f1), the compensation signal (Vcom, Icom) being adapted to be added to a bias signal (V TUNE ,I BIAS ) of the local oscillator (1) to tune the tunable frequency (f t ).
摘要翻译：振荡器电路包括被配置为产生具有可调频率（ft）的载波信号（2）的本地振荡器（1），与本地振荡器（1）级联耦合的第一调制器（SW1）和功率放大器（PA），以及被配置为产生输出信号（V OUT），所述第一调制器（SW1）被配置为从具有第一频率（f1）的第一调制信号（PT）激活，所述第一频率（f1）定义为所述第一调制器（SW1）的交替状态ON和状态OFF，所述振荡器电路还包括：估计器单元，被配置为在时间窗口（“Tx”）期间接收所述载波信号（2），并且在所述时间窗口（“Tx”）期间检测所述载波信号（2）的估计频率变化状态ON和所述第一调制器（SW1）的状态OFF;补偿单元（16），包括第二调制器（SW2），并被配置为产生与估计的频率变化（f）成比例的补偿信号（Vcom，Icom）和用第二调制频率进行调制 cy（f2），所述第二调制频率（f2）与所述第一调制频率（f1）基本相同，所述补偿信号（Vcom，Icom）适于添加到偏置信号（V TUNE，I BIAS）本地振荡器（1）调谐可调谐频率（ft）。

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