公开(公告)号：US07598479B2

公开(公告)日：2009-10-06

申请号：US10566240

申请日：2003-07-30

Applicant: Masamichi Nogami ,  Masaki Noda ,  Hitoyuki Tagami ,  Kuniaki Motoshima

Inventor： Masamichi Nogami ,  Masaki Noda ,  Hitoyuki Tagami ,  Kuniaki Motoshima

IPC: H03F3/08

CPC classification number: H03G3/3084 ,  H03F3/08 ,  H03G1/0047 ,  H03G2201/103 ,  H03G2201/502 ,  H04B10/69

Abstract: A gain switching circuit switches a conversion gain of a preamplifier that is configured with a series circuit formed with a first resistor and a first switching element and a series circuit formed with a second resistor and a second switching element respectively connected in parallel with a feedback resistor. The gain switching circuit includes a first operating unit that generates a first switching element operating signal for closing the first switching element within a first gain switching period, and a second operating unit that generates a second switching element operating signal for closing the second switching element within a second gain switching period.

Abstract translation: 增益切换电路切换配置有由第一电阻器和第一开关元件形成的串联电路的前置放大器的转换增益，以及与分别与反馈电阻并联连接的第二电阻器和第二开关元件形成的串联电路 。 增益切换电路包括第一操作单元，其在第一增益切换周期内产生用于闭合第一开关元件的第一开关元件操作信号，以及第二操作单元，其产生用于闭合第二开关元件的第二开关元件操作信号 第二增益切换周期。

公开(公告)号：US07260374B2

公开(公告)日：2007-08-21

申请号：US10841591

申请日：2004-05-06

Applicant: Hyung-Soo Lee ,  Sang-In Cho ,  Kyu-Min Kang ,  Chang-Joo Kim

Inventor： Hyung-Soo Lee ,  Sang-In Cho ,  Kyu-Min Kang ,  Chang-Joo Kim

IPC: H04B1/06

CPC classification number: H04W52/52 ,  H03G3/3052 ,  H03G2201/103 ,  H03G2201/502 ,  H03G2201/702 ,  H04B1/71637

Abstract: Disclosed is a method for controlling power level of received signal in an ultra wide band transmission system which uses multi frequency bands, and includes a pre-gain controller (PGC) and a voltage gain amplifier (VGA). The method for controlling a power level of a received signal includes the steps of: a) at the PGCs, detecting which multi frequency band is used in a transmitter of the transmission system; b) at the PGCs, obtaining the voltage gain owing to the discrepancy in the power levels of the received signals; and c) at the PGCs, compensating for the power loss based on the voltage gain.

Abstract translation: 公开了一种在使用多频带的超宽带传输系统中控制接收信号的功率电平的方法，包括预增益控制器（PGC）和电压增益放大器（VGA）。 用于控制接收信号的功率电平的方法包括以下步骤：a）在PGC检测在传输系统的发射机中使用哪个多频带; b）在PGC处，由于接收到的信号的功率电平的差异而获得电压增益; 和c）在PGC处，基于电压增益来补偿功率损耗。

公开(公告)号：US20050143942A1

公开(公告)日：2005-06-30

申请号：US11040354

申请日：2005-01-21

Applicant: Kumen Blake ,  James Nolan

Inventor： Kumen Blake ,  James Nolan

IPC: G06F19/00 ,  H03F3/00 ,  H03G3/00 ,  H03G3/30

CPC classification number: H03G3/001 ,  H03G3/3026 ,  H03G2201/103 ,  H03G2201/502

Abstract: An amplifier having programmable operational characteristics and a serial communications interface are fabricated on an integrated circuit (IC). The serial communications interface controls the operational characteristics, e.g., gain, frequency response, etc., of the amplifier. A multiplexer (MUX) may also be included on the IC and may be controlled by the serial communications interface. Status of the amplifier may also be obtained through the serial communications interface. The pin count of the IC package may be kept to a minimum by using the serial communications interface.

Abstract translation: 在集成电路（IC）上制造具有可编程操作特性的放大器和串行通信接口。 串行通信接口控制放大器的操作特性，例如增益，频率响应等。 多路复用器（MUX）也可以被包括在IC上并且可以由串行通信接口来控制。 也可以通过串行通信接口获得放大器的状态。 使用串行通信接口可以将IC封装的引脚数保持在最小值。

公开(公告)号：US06906584B1

公开(公告)日：2005-06-14

申请号：US10732106

申请日：2003-12-10

Applicant: Mark Moffat ,  Marcus Granger-Jones

Inventor： Mark Moffat ,  Marcus Granger-Jones

IPC: H03G1/00 ,  H03G3/20 ,  H03G3/30 ,  H03F3/45

CPC classification number: H03G3/3078 ,  H03F2203/7215 ,  H03F2203/7218 ,  H03G1/0088 ,  H03G3/3052 ,  H03G2201/103 ,  H03G2201/202 ,  H03G2201/305 ,  H03G2201/502

Abstract: The present invention provides a switchable gain amplifier comprising a high-pass filter pole. The switchable gain amplifier comprises first and second input nodes for receiving first and second components of a differential input signal. A first input terminal of a first differential amplifier is coupled to the first input node, and a first input terminal of a second differential amplifier is coupled to the second input node. A first variable resistance is coupled between the first input terminal of the first differential amplifier and a second input terminal of the first differential amplifier. A second variable resistance is coupled between the first input terminal of the second differential amplifier and a second input terminal of the second differential amplifier. A differential capacitor is coupled between the second input terminal of the first differential amplifier and the second input terminal of the second differential amplifier.

Abstract translation: 本发明提供一种包括高通滤波器极的可切换增益放大器。 可切换增益放大器包括用于接收差分输入信号的第一和第二分量的第一和第二输入节点。 第一差分放大器的第一输入端耦合到第一输入节点，第二差分放大器的第一输入端耦合到第二输入节点。 第一可变电阻耦合在第一差分放大器的第一输入端和第一差分放大器的第二输入端之间。 第二可变电阻耦合在第二差分放大器的第一输入端和第二差分放大器的第二输入端之间。 差分电容器耦合在第一差分放大器的第二输入端和第二差分放大器的第二输入端之间。

公开(公告)号：US06303922B1

公开(公告)日：2001-10-16

申请号：US09120388

申请日：1998-07-21

Applicant: Bryon L. Kasper

Inventor： Bryon L. Kasper

IPC: H01J4014

CPC classification number: H03G9/16 ,  H03F3/087 ,  H03G1/0088 ,  H03G3/3084 ,  H03G2201/103 ,  H03G2201/502

Abstract: At least two innovations are used to overcome the limitations of conventional transimpedance or high impedance optical receiver front end amplifiers. The innovations are a) multiple stage equalization of a high-feedback resistor, low-gain transimpedance amplifier to obtain high sensitivity, and b) range switching of feedback resistors and equalization capacitors to obtain high overload. With these approaches, it is possible to design an optical receiver operating at the intrinsic limits of available device technology.

Abstract translation: 使用至少两个创新来克服常规跨阻抗或高阻抗光接收机前端放大器的限制。 创新是a）高反馈电阻，低增益互阻抗放大器的多级均衡以获得高灵敏度，以及b）反馈电阻和均衡电容的范围切换以获得高过载。 利用这些方法，可以设计在可用设备技术的固有极限下操作的光接收机。