公开(公告)号：EP0938186B1

公开(公告)日：2003-11-12

申请号：EP98830077.8

申请日：1998-02-19

Applicant: STMicroelectronics S.r.l.

Inventor： Cali', Giovanni ,  Granata, Angelo ,  Palmisano, Giuseppe

IPC: H03F3/00 ,  H03F3/72

CPC classification number: H03F3/72 ,  Y10T307/747 ,  Y10T307/76

公开(公告)号：EP1337035A1

公开(公告)日：2003-08-20

申请号：EP02425035.9

申请日：2002-01-29

Applicant: STMicroelectronics S.r.l.

Inventor： Filoramo, Pietro ,  Granata, Angelo

IPC: H03D7/14 ,  H03G1/00

CPC classification number: H03G1/0023 ,  H03D7/1433 ,  H03D7/1458 ,  H03D7/1491 ,  H03D2200/0025 ,  H03D2200/0043

Abstract: An exponentially variable gain mixer comprises a variable gain mixer receiving an input differential signal to be amplified and producing an amplified differential output signal in function of a differential modulation signal and of a control voltage, at least an oscillating circuit generating an alternated differential signal, a correction circuit input with an external gain variation command and with the alternated differential signal for producing the differential modulation signal and the control voltage.
Differently from comparable known circuits, the modulator does not require a peak detector because the correction circuit comprises a first amplifier input with the external gain variation command that generates the control voltage and a bias voltage as differential output signal, and a second differential amplifier referred to the bias voltage, input with the alternated differential signal that outputs the differential modulation signal.

Abstract translation: 指数可变增益混频器包括可变增益混频器，其接收待放大的输入差分信号，并且产生具有差分调制信号和控制电压的放大差分输出信号，至少产生交替差分信号的振荡电路， 具有外部增益变化指令的校正电路输入和用于产生差分调制信号和控制电压的交替差分信号。 与可比较的已知电路不同，调制器不需要峰值检测器，因为校正电路包括具有产生控制电压的外部增益变化指令和作为差分输出信号的偏置电压的第一放大器输入和第二差分放大器 偏置电压，输入与输出差分调制信号的交替差分信号。

公开(公告)号：EP1337035B1

公开(公告)日：2005-07-27

申请号：EP02425035.9

申请日：2002-01-29

Applicant: STMicroelectronics S.r.l.

Inventor： Filoramo, Pietro ,  Granata, Angelo

IPC: H03D7/14 ,  H03G1/00

CPC classification number: H03G1/0023 ,  H03D7/1433 ,  H03D7/1458 ,  H03D7/1491 ,  H03D2200/0025 ,  H03D2200/0043

公开(公告)号：EP1780888A1

公开(公告)日：2007-05-02

申请号：EP05425715.9

申请日：2005-10-12

Applicant: STMicroelectronics S.r.l.

Inventor： Granata, Angelo

IPC: H03H7/12 ,  H03H11/52 ,  H03H11/06

CPC classification number: H03H7/12 ,  H03H7/1791 ,  H03H11/52 ,  H03H2011/0488 ,  H03H2210/012 ,  H03H2210/015 ,  H03H2210/025 ,  H03H2210/036 ,  H03H2210/04

Abstract: The present invention describes a notch filter suitable for attenuating certain frequencies of a radio-frequency signal (TX). The filter comprises an input (A) for receiving the radio-frequency signal and an output (B) for the output of a portion of the radio-frequency signal, first (C1(n1)) and second (C2(n2)) capacitive means, at least one inductor (L) and a negative resistance circuit (5) compensating the resistive losses of said at Least one inductor (L). The inductor and the first and second capacitive means are placed so as to produce a resonator and the filter (1) comprises a control device (4) controlling the negative resistance circuit (5). The input impedance (Zf) of the filter comprises a pole (ω p ) and a zero (ω z ) and the pole depends on the value of the second capacitive means (C2(n2)) and the zero depends on both the value of the first and second capacitive means; said first and second capacitive means are variable and said control device (4) controls the first and second capacitive means.

Abstract translation: 本发明描述了适合于衰减的射频信号（TX）的某些频率的陷波滤波器。 用于接收射频信号，并为射频信号，第一（C1（N1））和第二（C2（N 2））的电容的一部分的输出的输出（B）滤波器的输入（A）包括 装置，至少一个电感器（L）和（5）补偿所述至少一个电感器（L）的电阻性损耗的负电阻电路。 所述电感器和所述第一和第二电容装置为放置，以便产生一个谐振器和所述过滤器（1）包括一个控制装置（4）控制所述负阻电路（5）。 滤波器的输入阻抗（Z f）包括一个极（E p）和一个零（E z）和极点取决于第二电容装置的值（C2（N 2））和零依赖于这两个值 第一和第二电容性装置; 所述第一和第二电容性装置是可变的，并且所述控制装置（4）控制所述第一和第二电容装置。

公开(公告)号：EP0938186A1

公开(公告)日：1999-08-25

申请号：EP98830077.8

申请日：1998-02-19

Applicant: STMicroelectronics S.r.l.

Inventor： Cali', Giovanni ,  Granata, Angelo ,  Palmisano, Giuseppe

IPC: H03F3/00 ,  H03F3/72

CPC classification number: H03F3/72 ,  Y10T307/747 ,  Y10T307/76

Abstract: A circuit for switching a capacitor (C) in an exclusive manner, on the selected one of a plurality of integrated amplifiers (A1, A2, ... AN) comprises a first current generator (IB) connected between a first supply node (VCC) and a first node of the circuit (H), a second current generator (IC) connected between a second supply node (GND) and a second node (L) of the circuit, electrically in parallel to the capacitor (C), an array of switches (S1, S2, ..., SN) of the same number of the integrated amplifiers, exclusively switcheable on, each connecting a directly biased diode (D1, D2, ..., DN) between the first node (H) and the second node (L), each integrated amplifier having a supply node coupled to the connecting node between a respective diode and a respective connecting switch of said array.

Abstract translation: 一种在排他的方式在切换的电容器（C）上的集成放大器（A1，A2，...，AN）的多个所选择的一个电路包括连接在第一电源节点之间的第一电流发生器（IB）（VCC ）和电路（H），连接在第二电源节点（GND）与电路的第二节点（L）之间的第二电流发生器（IC）的第一节点，电并联到电容器（C），以 相同数量的集成放大器的开关（S1，S2，...，SN）的阵列，专可变换上，每个连接的第一节点之间的直接偏置的二极管（D1，D2，...，DN）（H ）和第二节点（L），其具有耦合到二极管和respectivement respectivement连接所述阵列的交换机之间的连接节点供给节点每个集成放大器。