公开(公告)号：EP2963825B1

公开(公告)日：2017-05-10

申请号：EP15173752.5

申请日：2015-06-25

Applicant: STMicroelectronics S.r.l.

Inventor： Scuderi, Angelo ,  Calcagno, Antonino ,  Scaccianoce, Salvatore

IPC: H03L7/00 ,  H04B1/04 ,  H03C1/62 ,  H03L7/02 ,  H03L7/18 ,  H04B1/38 ,  H04B7/00 ,  H04L25/49

CPC classification number: H03L7/02 ,  H03B2202/06 ,  H03C1/62 ,  H03L7/18 ,  H04B1/0475 ,  H04B1/38 ,  H04B7/00 ,  H04L25/4902

公开(公告)号：EP1696558A1

公开(公告)日：2006-08-30

申请号：EP05425097.2

申请日：2005-02-25

Applicant: STMicroelectronics S.r.l.

Inventor： Scuderi, Angelo ,  Scuderi, Antonino ,  La Paglia, Luca ,  Carrara, Francesco ,  Palmisano, Giuseppe

IPC: H03F1/52 ,  H03G3/30 ,  H03F3/189

CPC classification number: H03F1/52 ,  H03F3/19 ,  H03F2200/447 ,  H03F2200/78 ,  H04B1/0466

Abstract: A novel protection technique and its circuital implementation are presented, which prevent load-mismatch-induced failure in solid-state power amplifiers. In radio- and microwave-frequency power amplifiers, the load voltage standing-wave ratio results in very high voltage peaks at the collector of the final stage (Q 3 ) and may eventually lead to permanent failure of the power transistor due to avalanche breakdown. The proposed solution avoids the risk of breakdown by attenuating the input power to the final stage (Q 3 ) during overvoltage conditions, thus limiting the output collector swing. This is accomplished by means of a feedback control system, which detects the peak voltage at the output collector node and clamps its value to a given threshold by varying the circuit gain. Indeed, the control loop is unlocked in nominal condition and it acts only when an output mismatching condition is detected. Moreover, a newly proposed control circuit allows a supply-independent collector-clamping threshold to be accurately set.

Abstract translation: 提出了一种新颖的保护技术及其电路实现，可以防止固态功率放大器的负载失配引起的故障。 在无线电和微波频率功率放大器中，负载电压驻波比导致在最终级（Q 3）的集电极处的非常高的电压峰值，并且可能由于雪崩击穿而最终导致功率晶体管的永久故障。 所提出的解决方案通过在过电压条件下衰减到最终级（Q 3）的输入功率来避免击穿的风险，从而限制输出收集器摆幅。 这通过反馈控制系统来实现，该系统检测输出收集器节点处的峰值电压，并通过改变电路增益将其值钳位到给定的阈值。 实际上，控制回路在标称状态下被解锁，并且仅在检测到输出失配条件时才起作用。 此外，新提出的控制电路允许精确地设定与电源无关的集电极钳位阈值。

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

Applicant: STMicroelectronics S.r.l.

Inventor： Scuderi, Angelo ,  Calcagno, Antonino ,  Scaccianoce, Salvatore

IPC: H03L7/00 ,  H04B1/04 ,  H03C1/62

CPC classification number: H03L7/02 ,  H03B2202/06 ,  H03C1/62 ,  H03L7/18 ,  H04B1/0475 ,  H04B1/38 ,  H04B7/00 ,  H04L25/4902

Abstract: 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 ).

Abstract translation: 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）。