公开(公告)号：US20110237212A1

公开(公告)日：2011-09-29

申请号：US13022954

申请日：2011-02-08

Applicant: Gaku Takemura

Inventor： Gaku Takemura

IPC: H03D7/16

CPC classification number: H03D7/165 ,  H03D2200/0074

Abstract: According to one embodiment, a radio receiving circuit includes a low-noise amplifier, a frequency conversion circuit, a capacitor interposed between the low-noise amplifier and the frequency conversion circuit, and an operational amplifier that includes a feedback resistor and amplifies a baseband signal. The gains in the frequency conversion circuit and the operational amplifier are kept constant irrespective of the level of a local oscillation frequency input to the frequency conversion circuit.

Abstract translation: 根据一个实施例，无线电接收电路包括低噪声放大器，频率转换电路，插入在低噪声放大器和频率转换电路之间的电容器，以及包括反馈电阻器并且放大基带信号的运算放大器 。 频率转换电路和运算放大器的增益保持恒定，而与输入到频率转换电路的本地振荡频率的电平无关。

公开(公告)号：US20100311329A1

公开(公告)日：2010-12-09

申请号：US12477301

申请日：2009-06-03

Applicant: Meng-An (Michael) Pan

Inventor： Meng-An (Michael) Pan

IPC: H03C1/52 ,  H04B7/005

CPC classification number: H03C1/36 ,  H03D7/1458 ,  H03D7/1466 ,  H03D2200/0074

Abstract: A RF transmitter is operable to transmit a signal at a frequency specified by the Bluetooth protocol. A passive upconversion mixer, which comprises a pair of MOSFET switches, is utilized inside the RF transmitter. The passive upconversion mixer is operable to receive analog local oscillator (LO) signals to be utilized for controlling operation of each of the pair of MOSFET switches to transmit signals with maximum gain. A MOS threshold voltage VTH and a DC component of a received baseband signal, VBB—DC, are determined for each of the pair of MOSFET switches. The determined VTH and the determined VBB—DC of the received baseband signal are combined such as VTH+VBB—DC and compared with a DC component of the received LO signals, VLO—DC. The VLO—DC is set equal to VTH+VBB—DC, accordingly, to provide maximum gain from the passive upconversion mixer for signal transmission.

Abstract translation: RF发射器可操作以以由蓝牙协议指定的频率发送信号。 无源上变频混频器包括一对MOSFET开关，用于RF发射器内部。 无源上变频混频器可操作以接收模拟本地振荡器（LO）信号，以用于控制一对MOSFET开关中的每一个的操作以发送具有最大增益的信号。 为这对MOSFET开关中的每一个确定接收基带信号VBB-DC的MOS阈值电压VTH和DC分量。 所接收的基带信号的确定的VTH和所确定的VBB-DC被组合，例如VTH + VBB-DC，并与所接收的LO信号VLO-DC的DC分量进行比较。 VLO-DC设置为等于VTH + VBB-DC，从而提供来自被动上变频混频器的信号传输的最大增益。

公开(公告)号：US07679543B2

公开(公告)日：2010-03-16

申请号：US12200923

申请日：2008-08-28

Applicant: Kyoung Seok Park ,  Nam Heung Kim ,  Gyu Suck Kim

Inventor： Kyoung Seok Park ,  Nam Heung Kim ,  Gyu Suck Kim

IPC: H03M1/12

CPC classification number: H03M1/804 ,  H03D7/14 ,  H03D2200/006 ,  H03D2200/0074 ,  H03D2200/0086

Abstract: Provided is a current sampling mixer that can be applied to a broadband broadcasting system. The current sampling mixer can change a structure of a current sampler including a plurality of capacitors to select and sum capacitors having a weight value given in the output, thereby performing a finite impulse response filter function and a harmonic rejection function.

Abstract translation: 提供了可以应用于宽带广播系统的电流采样混频器。 电流采样混频器可以改变包括多个电容器的电流采样器的结构，以选择和求和输出中给出的权重值的电容器，从而执行有限脉冲响应滤波器功能和谐波抑制功能。

公开(公告)号：US4317230A

公开(公告)日：1982-02-23

申请号：US103152

申请日：1979-12-13

Applicant: Albert Boubouleix

Inventor： Albert Boubouleix

IPC: H03C1/54 ,  H03D7/14 ,  H04B1/28

CPC classification number: H03C1/545 ,  H03D7/1408 ,  H03D7/1433 ,  H03D7/1458 ,  H03D7/1466 ,  H03D7/1491 ,  H03D2200/0074

Abstract: Mixer which has, in place of four conventional diodes, the collector - emitter spaces of transistors polarized to earth and supplied at their bases by the local oscillating signal across a coupling system and as a result giving performance levels like those obtained with diodes, but with a lower local oscillating power.

Abstract translation: 混合器代替四个传统的二极管，极化到地球的晶体管的集电极 - 发射极间隔，并通过耦合系统通过本地振荡信号在其基极处提供，并且因此提供与二极管获得的性能水平，但是具有 较低的本地振荡功率。

公开(公告)号：US20190190452A1

公开(公告)日：2019-06-20

申请号：US16005458

申请日：2018-06-11

Applicant: QUALCOMM Incorporated

Inventor： Bo YANG

IPC: H03D7/14

CPC classification number: H03D7/1466 ,  H03D7/1441 ,  H03D7/1458 ,  H03D7/165 ,  H03D2200/006 ,  H03D2200/0074 ,  H03D2200/0088 ,  H04B1/38

Abstract: A passive mixer may include an output coupled to a next stage circuit. The output may be coupled to baseband inputs via first switches. The passive mixer may further include a tunable capacitor bank. The tunable capacitor bank may be coupled via second switches to the baseband inputs.

公开(公告)号：US09967115B1

公开(公告)日：2018-05-08

申请号：US15617828

申请日：2017-06-08

Applicant: Linxiao Zhang ,  Harish Krishnaswamy

Inventor： Linxiao Zhang ,  Harish Krishnaswamy

IPC: H04B7/10 ,  H04L25/03 ,  H03D7/14 ,  H03F3/19 ,  H04B7/0413

CPC classification number: H04L25/03891 ,  H03D2200/0074 ,  H03F3/19 ,  H03F3/45201 ,  H03F2200/294 ,  H03F2200/451 ,  H03F2203/45492 ,  H04B7/0617

Abstract: A circuit for spatial equalization, comprising: circuit elements each comprising four variable transconductors, in each of the circuit elements: an input of a first variable transconductor (VT) is connected to an input I and an output of the first VT is connected to an output I; an input of the second VT is connected to an input Q and an output of the second VT is connected to output I; an input of the third VT is connected to input I and an output of the third VT is connected to the output Q; and an input of the fourth VT is connected to input Q and an output of the fourth VT is connected to output Q; the input I of each of the first plurality of circuit elements are connected together; and the input Q of each of the first plurality of circuit elements are connected together.

公开(公告)号：US09800278B2

公开(公告)日：2017-10-24

申请号：US15257354

申请日：2016-09-06

Applicant: North Carolina State University

Inventor： Brian Allan Floyd ,  Charley Theodore Wilson, III ,  Jeffrey Franklin Bonner-Stewart ,  Frederick Vosburgh

IPC: H04B1/44 ,  H04B1/10 ,  H04L7/00

CPC classification number: H04B1/1081 ,  H03D7/165 ,  H03D2200/0074 ,  H03H7/20 ,  H03H7/463 ,  H04B1/1036 ,  H04B1/18 ,  H04L7/0016

Abstract: Tunable filters, cancellers, and duplexers based on passive mixers. A tunable delay cell includes passive mixers electrically coupled together for receiving an input signal and outputting a delayed signal, each passive mixer comprising a plurality of mixer switches. The tunable delay includes a control circuit for providing, to each passive mixer, a respective plurality of local oscillator (LO) signals, one to each mixer switch of each passive mixer. The control circuit is configured to vary the LO signals to cause a target frequency band of the input signal to be delayed by a target delay time in propagating through the passive mixers.

公开(公告)号：US09503097B2

公开(公告)日：2016-11-22

申请号：US14606967

申请日：2015-01-27

Applicant: Crocus Technology Inc.

Inventor： Douglas J. Lee ,  Yaron Oren-Pines ,  Stuart Desmond Rumley ,  Seyed A. Tabatabaei ,  Bertrand F. Cambou

IPC: H01L21/822 ,  H03K19/18 ,  G11C11/16

CPC classification number: H03K19/18 ,  G11C11/16 ,  G11C11/1659 ,  G11C11/1673 ,  G11C11/1675 ,  H01L21/822 ,  H03B15/006 ,  H03D7/00 ,  H03D2200/0074

Abstract: A circuit includes a magnetic logic unit including input terminals, output terminals, a field line, and magnetic tunnel junctions (MTJs). The field line electrically connects a first and a second input terminal, and is configured to generate a magnetic field based on an input to at least one of the first and the second input terminal. The input is based on a first analog input to the circuit. Each MTJ is electrically connected to a first and a second output terminal, and is configured such that an output of at least one of the first and the second output terminal varies in response to a combined resistance of the MTJs. The resistance of the MTJs varies based on the magnetic field. The circuit is configured to mix the first analog input and a second analog input to generate an analog output based on the output of the second output terminal.

Abstract translation: 电路包括包括输入端子，输出端子，场线和磁隧道结（MTJ）的磁逻辑单元。 场线电连接第一和第二输入端子，并且被配置为基于对第一和第二输入端子中的至少一个的输入产生磁场。 输入基于电路的第一个模拟输入。 每个MTJ电连接到第一和第二输出端，并且被配置为使得第一和第二输出端中的至少一个的输出响应于MTJ的组合电阻而变化。 MTJ的电阻根据磁场而变化。 电路被配置为混合第一模拟输入和第二模拟输入以基于第二输出端的输出产生模拟输出。

公开(公告)号：US09209750B2

公开(公告)日：2015-12-08

申请号：US14396150

申请日：2013-12-25

Applicant: PANASONIC CORPORATION

Inventor： Masahiro Kumagawa ,  Yuusuke Yamaoka

IPC: G06F7/44 ,  G06G7/14 ,  H03D7/14 ,  H03D7/16 ,  H03D7/12

CPC classification number: H03D7/1475 ,  H03D7/125 ,  H03D7/1441 ,  H03D7/165 ,  H03D2200/0074 ,  H03D2200/0086

Abstract: A harmonic rejection mixer is disclosed that is capable of supporting wideband reception without any increase in circuit area. In this apparatus, transistors convert an RF signal to currents. Transistors perform frequency conversion based on the currents from the transistors and local oscillation signals. Transistors distribute the currents from the transistors to all transistors or some transistors based on a predetermined ratio. A load adds up the currents from the transistors and converts the resultant current to a voltage.

Abstract translation: 公开了能够支持宽带接收而不增加电路面积的谐波抑制混频器。 在该装置中，晶体管将RF信号转换为电流。 晶体管基于来自晶体管的电流和本地振荡信号执行变频。 晶体管基于预定的比例将电流从晶体管分配到所有晶体管或一些晶体管。 负载将来自晶体管的电流相加，并将所得电流转换成电压。

公开(公告)号：US20150214926A1

公开(公告)日：2015-07-30

申请号：US14577542

申请日：2014-12-19

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Massoud TOHIDIAN ,  Iman MADADI ,  Robert Bogdan STASZEWSKI

IPC: H03H7/00

CPC classification number: H03H11/04 ,  H03D7/125 ,  H03D7/165 ,  H03D2200/006 ,  H03D2200/0074 ,  H03H15/023

Abstract: A discrete-time filter for filtering an input signal comprises a switched capacitor network, the switched capacitor network comprising an input and an output, a number of switched capacitor paths arranged in parallel between the input and the output, each switched capacitor path comprising a capacitor, and a switch circuitry for switching each capacitor at a different time instant for outputting a filtered input signal.

Abstract translation: 用于滤波输入信号的离散时间滤波器包括开关电容器网络，开关电容器网络包括输入和输出，并联在输入和输出之间的多个开关电容器路径，每个开关电容器路径包括电容器 以及用于在不同时刻切换每个电容器以输出滤波后的输入信号的开关电路。