公开(公告)号：US07894780B2

公开(公告)日：2011-02-22

申请号：US11762573

申请日：2007-06-13

Applicant: Meng-An Pan ,  Ali Afsahi ,  Vikram Magoon ,  Arya Behzad

Inventor： Meng-An Pan ,  Ali Afsahi ,  Vikram Magoon ,  Arya Behzad

IPC: H04B1/02 ,  H01Q11/12

CPC classification number: H04B1/02 ,  H03F1/32 ,  H03F3/24 ,  H03F2200/168 ,  H03F2200/321 ,  H03F2200/336 ,  H04B1/005 ,  H04B2001/0408

Abstract: Various aspect of a system for a linearized transmitter including a power amplifier may include at least one transconductance amplifier that enables generation of a single analog quadrature signal. Transmitter mixers may enable generation of a plurality of upconverted RF signals in a corresponding plurality of RF processing chains based on the generated single analog quadrature signal. In various embodiments of the invention, a gain stage, for example gain stage, may also be referred to as an RF processing chain. Power amplifier circuit may enable generation of a corresponding plurality of RF output signals within a wireless communication system based on the generated plurality of upconverted RF signals.

Abstract translation: 用于包括功率放大器的线性化发射机的系统的各个方面可以包括能够产生单个模拟正交信号的至少一个跨导放大器。 发射机混频器可以使得能够基于所生成的单个模拟正交信号在对应的多个RF处理链中产生多个上变频RF信号。 在本发明的各种实施例中，增益级，例如增益级，也可以被称为RF处理链。 功率放大器电路可以使得能够基于所生成的多个上变频RF信号在无线通信系统内产生相应的多个RF输出信号。

公开(公告)号：US20100311366A1

公开(公告)日：2010-12-09

申请号：US12792905

申请日：2010-06-03

Applicant: Meng-An Pan

Inventor： Meng-An Pan

IPC: H04B1/04

CPC classification number: H04B1/525

Abstract: Methods and systems for a transmitter LOFT cancellation scheme that maintains IQ balance are disclosed. Aspects of one method may include providing current compensation to both differential inputs of a mixer for each of I and Q channels. An initial current compensation of X units may be provided, followed by subsequent compensation as needed. The initial compensation may be provided to each differential input of the mixers used for I and Q channels. The subsequent current compensation for the I channel may be independent of the subsequent current compensation for the Q channel. Subsequent current compensation to a first differential input for a mixer may be increased by Y units while decreasing current compensation to the second differential input of the mixer by Y units. In this manner, the DC common mode level for the mixer may remain the same at the initial DC compensation current of X units for both mixers.

Abstract translation: 公布了维持IQ平衡的发射机LOFT取消方案的方法和系统。 一种方法的方面可以包括为I和Q通道中的每一个向混频器的两个差分输入提供电流补偿。 可以提供X单位的初始电流补偿，然后根据需要进行后续补偿。 可以将初始补偿提供给用于I和Q通道的混频器的每个差分输入。 对I通道的后续电流补偿可以独立于Q通道的后续电流补偿。 对于混合器的第一差分输入的随后的电流补偿可以通过Y单元增加，同时将混合器的第二差分输入的电流补偿减少Y个单位。 以这种方式，对于两个混频器，混频器的DC共模电平在X单元的初始DC补偿电流下可以保持相同。

公开(公告)号：US07701259B2

公开(公告)日：2010-04-20

申请号：US11690250

申请日：2007-03-23

Applicant: Meng-An Pan

Inventor： Meng-An Pan

IPC: H03K5/153

CPC classification number: H03F3/45179 ,  G01R19/04 ,  H03F2200/78 ,  H03F2203/45522 ,  H03F2203/45591 ,  H03F2203/45686 ,  H03G3/30 ,  H03G7/00

Abstract: Aspects of a method and system for wide range amplitude detection are provided. In this regard, many electronic systems may require amplitude detection of a variety of signals with widely varying amplitudes. Aspects of the invention may comprise suitable logic, circuitry, and/or code to perform amplitude detection and may be easily configured to accommodate a wide range of amplitudes. In this regard, the configuration of the amplitude detector may be performed via simple design changes and/or may be dynamically configured by suitable logic, circuitry, and/or code. Accordingly, multiplexing a single instance of the wide range amplitude detector and/or multiplexing multiple instances of the wide range amplitude detector may result in reduced design time, reduced circuit size, and/or reduced cost.

Abstract translation: 提供了用于宽范围幅度检测的方法和系统的方面。 在这方面，许多电子系统可能需要对具有广泛变化幅度的各种信号进行幅度检测。 本发明的方面可以包括用于执行振幅检测的合适的逻辑，电路和/或代码，并且可以容易地配置为适应宽范围的幅度。 在这方面，幅度检测器的配置可以通过简单的设计改变来执行和/或可以由合适的逻辑，电路和/或代码来动态配置。 因此，对宽范围幅度检测器的单个实例进行多路复用和/或复用多范围幅度检测器的多个实例可以导致缩短的设计时间，减小的电路尺寸和/或降低的成本。

公开(公告)号：US07603098B2

公开(公告)日：2009-10-13

申请号：US10813270

申请日：2004-03-31

Applicant: Meng-An Pan

Inventor： Meng-An Pan

IPC: H04B1/10

CPC classification number: H04B1/123 ,  H03G3/3052 ,  H03G2201/706 ,  H03J3/06

Abstract: The invention enables a compromise between DC offset rejection and image rejection through the use of a bandpass filter having a variable center frequency.

Abstract translation: 本发明通过使用具有可变中心频率的带通滤波器来实现DC偏移抑制和图像抑制之间的折中。

公开(公告)号：US07603085B2

公开(公告)日：2009-10-13

申请号：US10840271

申请日：2004-05-07

Applicant: Meng-An Pan

Inventor： Meng-An Pan

IPC: H04B17/00

CPC classification number: H04B1/123 ,  H03G3/3052 ,  H03G2201/706 ,  H03J3/06

Abstract: The invention enables a gain adjustment in a receiver to improve signal quality.

Abstract translation: 本发明使得接收机中的增益调整能够提高信号质量。

公开(公告)号：US07474880B2

公开(公告)日：2009-01-06

申请号：US11087704

申请日：2005-03-24

Applicant: Meng-An Pan

Inventor： Meng-An Pan

IPC: H01Q11/12 ,  H04B1/02

CPC classification number: H04B1/0003 ,  H03F1/0261 ,  H03F3/45188 ,  H03G3/3042 ,  H03G2201/103 ,  H03G2201/202 ,  H03G2201/307 ,  H03G2201/40 ,  H04B1/0475

Abstract: A transmitter includes a dual mode modulator and an amplifier coupled to the dual mode modulator. The dual mode modulator implements a linear modulation scheme during a first mode of the modulator to produce a variable envelope modulated signal. The dual mode modulator implements a non-linear modulation scheme during a second mode of the modulator to produce a constant envelope modulated signal. The amplifier is biased as a linear amplifier during the first mode of the modulator and is biased as a non-linear amplifier during the second mode of the modulator. A feed-forward connection between the dual mode modulator and the amplifier is used to indicate a change in modulation mode and to adjust the bias of the amplifier. A power of the constant envelope modulated signal is increased such that an operating point of the amplifier remains substantially constant during the first and second modes of the modulator.

Abstract translation: 发射机包括耦合到双模调制器的双模调制器和放大器。 双模式调制器在调制器的第一模式期间实现线性调制方案，以产生可变包络调制信号。 双模式调制器在调制器的第二模式期间实现非线性调制方案，以产生恒定的包络调制信号。 放大器在调制器的第一模式期间被偏置为线性放大器，并且在调制器的第二模式期间被偏置为非线性放大器。 双模式调制器和放大器之间的前馈连接用于指示调制模式的变化并调整放大器的偏置。 恒定包络调制信号的功率增加，使得放大器的工作点在调制器的第一和第二模式期间保持基本恒定。

公开(公告)号：US20080136520A1

公开(公告)日：2008-06-12

申请号：US11617458

申请日：2006-12-28

Applicant: Meng-An Pan

Inventor： Meng-An Pan

IPC: H03F3/45

CPC classification number: H03G1/0035

Abstract: Methods and systems for digitally controlling transmitter gain compensation are disclosed. Aspects of one method may include applying an effective negative resistance to differential outputs of amplifying circuitry to compensate for gain changes that may be due to temperature changes. The effective negative resistance may be provided via a plurality of load circuits coupled in parallel to the differential outputs. The plurality of load circuits may have similar effective negative resistances, or the plurality of load circuits may be binary weighted. Each load circuit may be selected via digital control signals that may enable the load circuit. This may allow adjusting of the effective negative resistance by selecting different load circuits.

Abstract translation: 公开了用于数字控制发射机增益补偿的方法和系统。 一种方法的方面可以包括对放大电路的差分输出施加有效的负电阻以补偿可能由温度变化引起的增益变化。 可以经由与差分输出并联耦合的多个负载电路来提供有效负电阻。 多个负载电路可以具有相似的有效负电阻，或者多个负载电路可以是二进制加权的。 每个负载电路可以通过可以使得负载电路的数字控制信号来选择。 这可以通过选择不同的负载电路来调节有效负电阻。

公开(公告)号：US20080057883A1

公开(公告)日：2008-03-06

申请号：US11511645

申请日：2006-08-29

Applicant: Meng-An Pan

Inventor： Meng-An Pan

IPC: H04B1/04 ,  H01Q11/12

CPC classification number: H03F3/24 ,  H03F1/0277 ,  H03F1/22 ,  H03F3/45188 ,  H03F3/72 ,  H03F2203/45052 ,  H03F2203/45371 ,  H03F2203/45396 ,  H03F2203/45481 ,  H03F2203/45702

Abstract: A circuit may be provided. The circuit may be a component of a dual mode transmitter such as a transmitter from the 802.11x family. The circuit may comprise an amplifier configured to provide amplification of a signal for transmission in either a first transmission mode or a second transmission mode, using power supplied from a power supply, the amplifier including at least one cascode transistor in series with at least one amplifying transistor. The circuit may further comprise a power controller configured to define an operating characteristic of the at least one cascode transistor, and thereby designate an amount of the power from the power supply that is used by the amplifier during the amplification, based on whether the amplifier is to be operated in the first transmission mode or the second transmission mode.

Abstract translation: 可以提供电路。 电路可以是诸如来自802.11x系列的发射机的双模式发射机的组件。 电路可以包括放大器，其被配置为使用从电源提供的功率来提供用于在第一传输模式或第二传输模式中传输的信号的放大，该放大器包括与至少一个放大器串联的至少一个共源共栅晶体管 晶体管。 电路还可以包括功率控制器，其被配置为限定至少一个共源共栅晶体管的工作特性，从而基于放大器是否放大器来指定放大器在放大期间由电源使用的功率的量 以第一传输模式或第二传输模式操作。

公开(公告)号：US07336129B2

公开(公告)日：2008-02-26

申请号：US11338068

申请日：2006-01-24

Applicant: Meng-An Pan

Inventor： Meng-An Pan

IPC: H03F3/45

CPC classification number: H03F3/45183 ,  H03F2200/372 ,  H03F2203/45544 ,  H03F2203/45658

Abstract: A circuit includes at least two transistors arranged to form a current mirror, at least two transistors operatively coupled to the current mirror, where the transistors are arranged to form a differential pair amplifier, and a follower transistor operatively coupled to the current mirror and to the differential pair. The transistors of the differential pair, the current mirror, and the follower transistor are operatively coupled such that during operation an amplitude of a signal output from the follower transistor is proportional to an amplitude of an signal input into the differential pair.

Abstract translation: 电路包括布置成形成电流镜的至少两个晶体管，可操作地耦合到电流镜的至少两个晶体管，其中晶体管被布置成形成差分对放大器，以及可操作地耦合到电流镜和至 差分对。 差分对，电流镜和跟随器晶体管的晶体管可操作地耦合，使得在操作期间，从跟随器晶体管输出的信号的幅度与输入到差分对的信号的幅度成比例。

公开(公告)号：US20070270111A1

公开(公告)日：2007-11-22

申请号：US11495675

申请日：2006-07-31

Applicant: Meng-An Pan

Inventor： Meng-An Pan

IPC: H04B1/04 ,  H01Q11/12

CPC classification number: H03G3/3047 ,  H03F3/45188 ,  H03F2203/45364 ,  H03F2203/45371 ,  H03F2203/45638 ,  H03G1/0029 ,  H03G3/3042

Abstract: A dual power mode transmitter is provided to save power when the transmitter switches from normal operating mode to low power operating mode. The dual power mode transmitter achieves power savings by controlling the amount of current draw in the input stage. Alternatively, the transmitter saves power by regulating the voltage at the output node of the input stage.

Abstract translation: 当发射机从正常工作模式切换到低功率工作模式时，提供一个双电源模式发射器来节省电力。 双功率模式发射器通过控制输入级中的电流消耗量来实现功率节省。 或者，发射器通过调节输入级的输出节点处的电压来节省功率。