公开(公告)号：EP3407490A1

公开(公告)日：2018-11-28

申请号：EP18172935.1

申请日：2018-05-17

Applicant: STMicroelectronics S.r.l.

Inventor： ZAMPROGNO, Marco ,  BONGIORNI, Maurizio ,  FLORA, Pasquale

IPC: H03F3/45 ,  H03F1/02

CPC classification number: H03F3/45273 ,  H03F1/0205 ,  H03F3/45183 ,  H03F3/45188 ,  H03F3/45192 ,  H03F3/45632 ,  H03F2200/513 ,  H03F2203/45654

Abstract: In a single-stage differential operational amplifier (30): an input stage formed by a pair of input transistors (31, 32), having control terminals connected to a respective first and second input (IN+, IN - ), first conduction terminals coupled to a respective first and second output (OUT-, OUT + ) and second conduction terminals able to receive a polarization current (I b ); an output stage formed by a pair of output transistors (34, 35), in diode configuration, having control terminals able to be coupled to a relative first conduction terminal, connected to a respective first and second output (OUT-, OUT+), and second conduction terminals connected to a reference line (gnd). A coupling stage (36) is furthermore interposed between the first conduction terminals of the output transistors (34, 35) and the first and second output (OUT-, OUT+) to define the diode configuration of the output transistors (34, 35) and moreover a gain value (G) of the operational amplifier (30) .

公开(公告)号：EP1842285B1

公开(公告)日：2016-01-20

申请号：EP05857779.2

申请日：2005-11-24

Applicant: NXP B.V.

Inventor： SANDULEANU, Mihai, A., T. ,  STIKVOORT, Eduard, F.

IPC: H03F1/32 ,  H03F3/19 ,  H03D7/14 ,  H03F3/45

CPC classification number: H03F1/3211 ,  H03F1/22 ,  H03F3/19 ,  H03F3/30 ,  H03F3/343 ,  H03F3/345 ,  H03F3/45 ,  H03F2200/06 ,  H03F2200/294 ,  H03F2200/372 ,  H03F2200/513

公开(公告)号：EP2936676A1

公开(公告)日：2015-10-28

申请号：EP13818635.8

申请日：2013-12-19

Applicant: Qualcomm Incorporated

Inventor： DHANASEKARAN, Vijayakumar

IPC: H03F1/02 ,  H03F3/45

CPC classification number: H03F1/0227 ,  H03F3/3022 ,  H03F3/45183 ,  H03F3/45475 ,  H03F2200/408 ,  H03F2200/513

Abstract: Exemplary embodiments are directed to operating a multi-stage amplifier with low-voltage supply voltages. A multi-stage amplifier may include a first path of an amplifier output stage configured to convey an output signal if a first supply voltage is greater than a threshold voltage. The multi-stage amplifier may also include a second path of the amplifier output stage configured to convey the output signal if the first supply voltage is less than or equal to the threshold voltage.

Abstract translation: 示例性实施例涉及操作具有低电压电源电压的多级放大器。 多级放大器可以包括放大器输出级的第一路径，其被配置为在第一电源电压大于阈值电压时传送输出信号。 多级放大器还可以包括放大器输出级的第二路径，其被配置为在第一电源电压小于或等于阈值电压时传送输出信号。

公开(公告)号：EP2667506A1

公开(公告)日：2013-11-27

申请号：EP12169324.6

申请日：2012-05-24

Applicant: ST-Ericsson SA

Inventor： Barbieri, Andrea ,  Nicollini, Germano

IPC: H03F1/02 ,  H03F3/30 ,  H03F3/45

CPC classification number: H03F3/45071 ,  H03F1/0261 ,  H03F3/21 ,  H03F3/3023 ,  H03F3/45183 ,  H03F2200/153 ,  H03F2200/411 ,  H03F2200/453 ,  H03F2200/456 ,  H03F2200/513 ,  H03F2203/45134 ,  H03F2203/45192 ,  H03F2203/45644 ,  H03F2203/45658 ,  H03M1/183

Abstract: The invention relates to a two-stage operational amplifier (400) in class AB for driving a load (R LB , R LA ) comprising:
- an input stage (401) comprising differential input terminals (I N , I P ) and a first differential output terminal (O1P) and a second differential output terminal (O1N);
- an output stage (402) comprising a first output branch (403) and a second output branch (404);
- a control circuit (405) comprising a first PMOS transistor (M BP2B ) connected in a current mirror configuration to a second PMOS transistor (M L2B ) of the first output branch (403), a first NMOS transistor (M BNB ) connected in series with the first PMOS transistor (M BP2B ), a third PMOS transistor (M BP2A ) connected in a current mirror configuration to a fourth PMOS transistor (M L2A ) of the second output branch (404), a second NMOS transistor (M BNA ) connected in series with the third PMOS transistor (M BP2A ).

Abstract translation: 本发明涉及用于驱动负载（R LB，R LA）的AB类中的两级运算放大器（400），包括：输入级（401），包括差分输入端（IN，IP）和第一差分输出 端子（O1P）和第二差分输出端子（O1N）; - 包括第一输出分支（403）和第二输出分支（404）的输出级（402）; - 控制电路（405），包括以电流镜配置连接到第一输出分支（403）的第二PMOS晶体管（M L2B）的第一PMOS晶体管（M BP2B），连接到第一NMOS晶体管 与第一PMOS晶体管（M BP2B）串联，以电流镜配置连接到第二输出分支（404）的第四PMOS晶体管（M L2A）的第三PMOS晶体管（M BP2A），第二NMOS晶体管（M BNA ）与第三PMOS晶体管（M BP2A）串联连接。

公开(公告)号：EP2122827A4

公开(公告)日：2010-05-26

申请号：EP07748341

申请日：2007-03-13

Applicant: ERICSSON TELEFON AB L M

Inventor： SJOELAND HENRIK ,  PHANSATHITWONG KITTICHAI

IPC: H03F3/45 ,  H03F1/02 ,  H03F3/72 ,  H03G1/00 ,  H03G3/30

CPC classification number: H03F3/45071 ,  H03F1/0205 ,  H03F1/26 ,  H03F1/3211 ,  H03F3/19 ,  H03F3/245 ,  H03F3/72 ,  H03F2200/294 ,  H03F2200/451 ,  H03F2200/513 ,  H03F2203/45306 ,  H03F2203/45318 ,  H03F2203/45352 ,  H03F2203/45396 ,  H03F2203/45554 ,  H03F2203/45638 ,  H03F2203/7236

公开(公告)号：EP1911152A1

公开(公告)日：2008-04-16

申请号：EP06736661.7

申请日：2006-03-01

Applicant: Sony Ericsson Mobile Communications AB

Inventor： EARL, Paul ,  HAHN, Christopher

IPC: H03F1/02 ,  H03F1/06

CPC classification number: H03F3/24 ,  H03F1/0205 ,  H03F1/0238 ,  H03F1/0244 ,  H03F2200/511 ,  H03F2200/513

Abstract: A bypass circuit (5) is disclosed for use with lower power supply voltage PC cards. The bypass circuit (5) controls the power supply voltage fed to a power amplifier (25) when switching between a lower power 8-PSK modulation mode and a higher power GMSK modulation mode. A step-up DC/DC converter (35) provides a higher voltage to the power amplifier (25) than can be supplied by an original power supply. Switch control logic (10) controls a step-up switch (15) and a battery switch (20). The step-up switch (15) is turned on when operating in an 8-PSK modulation mode to provide a higher voltage to the power amplifier (25) than the original power supply voltage (40). The battery switch (20) is turned on when operating in the GMSK modulation mode to provide the original power supply voltage (40) to the power amplifier (25).

公开(公告)号：EP1325555B1

公开(公告)日：2007-12-12

申请号：EP01979521.0

申请日：2001-10-05

Applicant: Skyworks Solutions, Inc.

Inventor： FINLAY, Hugh, J. ,  BLOOM, Mark ,  FOWLER, Thomas

IPC: H03F3/04

CPC classification number: H03F3/343 ,  H03F1/0261 ,  H03F1/302 ,  H03F2200/18 ,  H03F2200/453 ,  H03F2200/513

Abstract: The bias control (300) selectively provides for bias of a power amplifier (120) based upon a bandgap voltage (442) generated by the bias control, or by a bias voltage external to the bias control. A controller (420) controls the selection of either the bandgap voltage (442) or external bias voltage. The bias control is fabricated in a first semiconductor material capable of operating at low voltage supply levels, such as complementary metal oxide semiconductor (CMOS) material and may be fabricated on an integrated circuit common with a power amplifier.

公开(公告)号：EP1378992B1

公开(公告)日：2007-05-09

申请号：EP03012147.9

申请日：2003-06-02

Applicant: TEXAS INSTRUMENTS DEUTSCHLAND GMBH

Inventor： Prexl, Franz ,  Steinhagen, Wolfgang, Dr. ,  Oberhuber Ralph, Dr.

IPC: H03F3/50

CPC classification number: H03F3/45475 ,  H03F3/505 ,  H03F2200/513 ,  H03F2203/45138

公开(公告)号：EP1122882A3

公开(公告)日：2004-09-22

申请号：EP00127728.4

申请日：2000-12-18

Applicant: Semiconductor Technology Academic Research Center

Inventor： Wada, Kazuyuki ,  Takagi, Shigetaka ,  Fujii, Nobuo

IPC: H03F3/45

CPC classification number: H03F3/45192 ,  H03F1/301 ,  H03F3/45475 ,  H03F2200/513 ,  H03F2203/45028 ,  H03F2203/45138

Abstract: A semiconductor integrated circuit comprises an amplifier circuit including a current output amplifier (1), a load resistor (2) having one end connected to an output terminal of the current output amplifier and a voltage control circuit (3) having an input terminal connected to the one end of the load resistor and an output terminal connected to an other end of the load resistor. The input terminal of the amplifier circuit serves as an input terminal of the current output amplifier, and the output terminals of the amplifier circuit serve as the individual ends of the load resistor.

Abstract translation: 一种半导体集成电路，包括：包括电流输出放大器（1）的放大器电路;一端连接到电流输出放大器的输出端的负载电阻器（2）;以及电压控制电路（3），其输入端连接到 负载电阻器的一端和连接到负载电阻器另一端的输出端子。 放大器电路的输入端用作电流输出放大器的输入端，放大器电路的输出端用作负载电阻器的各端。

公开(公告)号：EP1293035A2

公开(公告)日：2003-03-19

申请号：EP01945080.8

申请日：2001-05-03

Applicant: Koninklijke Philips Electronics N.V.

Inventor： BERKHOUT, Marco

IPC: H03F1/00

CPC classification number: H03F3/2171 ,  H03F2200/513

Abstract: The invention relates to a push-pull amplifier having a level shift circuit to generate different control signals to a driver of a switch. The amplifier has to cope with the voltage limitations of the device. To reduce standby power the level shifter is used. The solution of the invention has as one of the great advantages that only during transitions a current will flow.