公开(公告)号：US20060226913A1

公开(公告)日：2006-10-12

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.

公开(公告)号：US20050009490A1

公开(公告)日：2005-01-13

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: H04B7/26 ,  H03G3/30 ,  H04B1/69 ,  H04B7/005 ,  H03F3/45

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：US06847904B2

公开(公告)日：2005-01-25

申请号：US10374016

申请日：2003-02-25

Applicant: Kumen E. Blake ,  James B. Nolan

Inventor： Kumen E. Blake ,  James B. Nolan

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

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

Abstract: A programmable gain amplifier (PGA) controlled through a serial communications interface are fabricated on an integrated circuit (IC). A multiplexer (MUX) may also be included on the IC. The serial communications interface controls the gain of the PGA, MUX channel selection, and other functions of the PGA. Status of the PGA may also be obtained through the serial communications interface. By using a serial communications interface, the pin count of the PGA IC package may be kept to a minimum.

Abstract translation: 通过串行通信接口控制的可编程增益放大器（PGA）在集成电路（IC）上制造。 多路复用器（MUX）也可以包括在IC上。 串行通信接口控制PGA的增益，MUX通道选择和PGA的其他功能。 也可以通过串行通信接口获得PGA的状态。 通过使用串行通信接口，可以将PGA IC封装的引脚数保持在最小值。

公开(公告)号：US20040259511A1

公开(公告)日：2004-12-23

申请号：US10864193

申请日：2004-06-09

Inventor： Der-Zheng Liu ,  Song-Nien Tang ,  Tai-Cheng Liu ,  Kuang-Yu Yen

IPC: H03M001/10

CPC classification number: H03G3/3052 ,  H03G2201/206 ,  H03G2201/302 ,  H03G2201/305 ,  H03G2201/307 ,  H03G2201/502 ,  H03G2201/508 ,  H03M1/185 ,  H04B7/0814

Abstract: The invention provides an automatic gain control and antenna selection method used in a receiver of a radio communication system. The received signal power is estimated by digital signal processing after analog-to-digital conversion in the system, in order to adjust the gain of the front end analog signal until the magnitude of the analog signal is adjusted to an optimum range of the digital signal processing. In addition, the ADC is utilized to estimate the signal power as the basis of the antenna selection.

Abstract translation: 本发明提供一种在无线电通信系统的接收机中使用的自动增益控制和天线选择方法。 接收到的信号功率通过系统中模数转换后的数字信号处理来估计，以便调整前端模拟信号的增益，直到模拟信号的幅度被调整到数字信号的最佳范围 处理。 此外，ADC用于估计信号功率作为天线选择的基础。

公开(公告)号：US11855598B2

公开(公告)日：2023-12-26

申请号：US17895771

申请日：2022-08-25

Applicant: Marvell Asia Pte Ltd.

Inventor： Praveen Prabha ,  Karthik Raviprakash ,  Luke Wang ,  Stephane Dallaire

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

CPC classification number: H03G3/3036 ,  H03G1/0088 ,  H03G3/001 ,  H03F3/45183 ,  H03G2201/502

Abstract: A variable gain amplifier includes input terminals configured to receive a differential input of the variable gain amplifier, output terminals configured to generate a differential output of the variable gain amplifier, the differential output having a gain applied by the variable gain amplifier to the differential input, and an impedance ladder circuit coupled to the input terminals, the impedance ladder circuit comprising a plurality of semiconductor switches configured to receive respective control signals based on a control voltage. The plurality of semiconductors switches are responsive to the respective control signals to adjust the gain of the variable gain amplifier and configured with a predetermined exponential scale such that the impedance ladder circuit causes a slope of the gain of the variable gain amplifier relative to the control voltage to be generally linear.

公开(公告)号：US06862322B1

公开(公告)日：2005-03-01

申请号：US09574239

申请日：2000-05-19

Applicant: John Farley Ewen ,  William K. Hogan ,  Kenneth Paul Jackson ,  Michael William Marlowe ,  Clint Lee Schow

Inventor： John Farley Ewen ,  William K. Hogan ,  Kenneth Paul Jackson ,  Michael William Marlowe ,  Clint Lee Schow

IPC: H03F3/08 ,  H03G1/00 ,  H03G3/30 ,  H03H19/00 ,  H03K9/00

CPC classification number: H03G1/0088 ,  H03F3/087 ,  H03F2203/7212 ,  H03G3/3084 ,  H03G2201/103 ,  H03G2201/502 ,  H03H19/008

Abstract: A switchable bandwidth optical receiver is implemented in a front-end of the receiver in at least one of three ways. A switchable impedance may be provided at the input to a preamplifier of the front end, the preamplifier of the front-end may have a switchable impedance therein, and/or a switchable filter may be provided at an output of the preamplifier.

Abstract translation: 可切换带宽光接收机以三种方式中的至少一种在接收机的前端实现。 可以在前端的前置放大器的输入处提供可切换阻抗，前端的前置放大器可以在其中具有可切换的阻抗，和/或可以在前置放大器的输出处提供可切换的滤波器。

公开(公告)号：US07505855B2

公开(公告)日：2009-03-17

申请号：US11040354

申请日：2005-01-21

Applicant: Kumen E. Blake ,  James B. Nolan

Inventor： Kumen E. Blake ,  James B. Nolan

IPC: H03F3/00

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

Abstract: An amplifier having programmable operational characteristics and a serial communications interface is 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：US07212795B2

公开(公告)日：2007-05-01

申请号：US10864193

申请日：2004-06-09

Applicant: Der-Zheng Liu ,  Song-Nien Tang ,  Tai-Cheng Liu ,  Kuang-Yu Yen

Inventor： Der-Zheng Liu ,  Song-Nien Tang ,  Tai-Cheng Liu ,  Kuang-Yu Yen

IPC: H04B1/06

CPC classification number: H03G3/3052 ,  H03G2201/206 ,  H03G2201/302 ,  H03G2201/305 ,  H03G2201/307 ,  H03G2201/502 ,  H03G2201/508 ,  H03M1/185 ,  H04B7/0814

Abstract: The invention provides an automatic gain control and antenna selection method used in a receiver of a radio communication system. The received signal power is estimated by digital signal processing after analog-to-digital conversion in the system, in order to adjust the gain of the front end analog signal until the magnitude of the analog signal is adjusted to an optimum range of the digital signal processing. In addition, the ADC is utilized to estimate the signal power as the basis of the antenna selection.

Abstract translation: 本发明提供一种在无线电通信系统的接收机中使用的自动增益控制和天线选择方法。 接收到的信号功率通过系统中模数转换后的数字信号处理来估计，以便调整前端模拟信号的增益，直到模拟信号的幅度被调整到数字信号的最佳范围 处理。 此外，ADC用于估计信号功率作为天线选择的基础。

公开(公告)号：US20040167736A1

公开(公告)日：2004-08-26

申请号：US10374016

申请日：2003-02-25

Applicant: Microchip Technology Incorporated

Inventor： Kumen E. Blake ,  James B. Nolan

IPC: G06F019/00

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

Abstract: A programmable gain amplifier (PGA) controlled through a serial communications interface are fabricated on an integrated circuit (IC). A multiplexer (MUX) may also be included on the IC. The serial communications interface controls the gain of the PGA, MUX channel selection, and other functions of the PGA. Status of the PGA may also be obtained through the serial communications interface. By using a serial communications interface, the pin count of the PGA IC package may be kept to a minimum.

Abstract translation: 通过串行通信接口控制的可编程增益放大器（PGA）在集成电路（IC）上制造。 多路复用器（MUX）也可以包括在IC上。 串行通信接口控制PGA的增益，MUX通道选择和PGA的其他功能。 也可以通过串行通信接口获得PGA的状态。 通过使用串行通信接口，可以将PGA IC封装的引脚数保持在最小值。

公开(公告)号：US20190253024A1

公开(公告)日：2019-08-15

申请号：US16342409

申请日：2017-10-18

Applicant: Carrier Corporation

Inventor： Ronie LAVON ,  Dan MELANSON

IPC: H03F1/30 ,  F23N5/08 ,  H03G1/00

CPC classification number: H03F1/30 ,  F23N5/082 ,  H03F1/34 ,  H03F3/087 ,  H03F3/45475 ,  H03F2200/126 ,  H03F2200/156 ,  H03F2200/261 ,  H03F2200/447 ,  H03F2203/45136 ,  H03F2203/45286 ,  H03F2203/45518 ,  H03F2203/45524 ,  H03F2203/45536 ,  H03G1/0088 ,  H03G2201/502

Abstract: An amplifier assembly (100) includes an amplifier (102) having an input terminal, an output terminal and a feedback terminal; a first feedback path connecting the output terminal to the feedback terminal; a second feedback path connecting the output terminal to the feedback terminal; a switch (124) positioned in the second feedback path, the switch (124) opening or closing in response to a voltage at the output terminal relative to a breakpoint, when the switch (124) is open, the amplifier assembly (100) has a first gain and when the switch (124) is closed, the amplifier assembly (100) has a second gain; and a thermally variable element (152) connected to the switch (124), the thermally variable element (152) configured to generate a compensation voltage to maintain the breakpoint in response to varying temperature of the switch (152).