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41. 发明授权

US06696887B2 Transistor-based interface circuitry 有权
标题翻译：基于晶体管的接口电路
公开(公告)号：US06696887B2
公开(公告)日：2004-02-24
申请号：US09964953
申请日：2001-09-27
申请人： Matthew S. Taubman
发明人： Matthew S. Taubman
IPC分类号： G06G712
CPC分类号： H03F3/08
摘要： Among the embodiments of the present invention is an apparatus that includes a transistor, a servo device, and a current source. The servo device is operable to provide a common base mode of operation of the transistor by maintaining an approximately constant voltage level at the transistor base. The current source is operable to provide a bias current to the transistor. A first device provides an input signal to an electrical node positioned between the emitter of the transistor and the current source. A second device receives an output signal from the collector of the transistor.
摘要翻译：本发明的实施例是一种包括晶体管，伺服装置和电流源的装置。伺服装置可操作以通过在晶体管基座处保持大致恒定的电压电平来提供晶体管的公共基本工作模式。电流源可操作以向晶体管提供偏置电流。第一装置向位于晶体管的发射极和电流源之间的电节点提供输入信号。第二器件从晶体管的集电极接收输出信号。

42. 发明授权

US06690231B1 Gain stage that minimizes the miller effect 有权
标题翻译：增益阶段，最小化磨机效应
公开(公告)号：US06690231B1
公开(公告)日：2004-02-10
申请号：US10127909
申请日：2002-04-22
申请人： Sheng-Hann Lee
发明人： Sheng-Hann Lee
IPC分类号： G06G712
CPC分类号： H03F3/4508 , H03F1/08 , H03F1/14
摘要： A gain stage is disclosed. The gain stage comprises a first stage that provides two voltages of equal and opposites polarities and a plurality of devices cross coupled to the first stage. The plurality of devices minimize the Miller Effect capacitance in the differential stage by providing an out-of-phase signal to the first stage. Accordingly, a system and method in accordance with the present invention utilizes an at least one extra device on the same die as the first stage to provide an impedance match. In so doing, a broadband cancellation of the Miller Effect is achieved. Moreover, the matching is valid over an extended temperature range.
摘要翻译：披露增益阶段。增益级包括提供相等和相对极性的两个电压的第一级和与第一级交叉耦合的多个器件。多个器件通过向第一级提供异相信号来最小化差分级中的米勒效应电容。因此，根据本发明的系统和方法利用与第一级相同的管芯上的至少一个额外的器件来提供阻抗匹配。这样做就可以实现米勒效应的宽带取消。此外，匹配在扩展的温度范围内有效。

43. 发明授权

US06667650B2 Current leakage compensation circuit and method 有权
标题翻译：电流泄漏补偿电路及方法
公开(公告)号：US06667650B2
公开(公告)日：2003-12-23
申请号：US10266885
申请日：2002-10-08
申请人： David A. Gammie , Jeffrey B. Parfenchuck , David M. Jones , Jerry L. Doorenbos
发明人： David A. Gammie , Jeffrey B. Parfenchuck , David M. Jones , Jerry L. Doorenbos
IPC分类号： G06G712
CPC分类号： H03F1/302
摘要： A leakage compensation circuit and technique is provided that compensates for losses in a referenced current of an amplifier circuit due to leakage elements. The leakage compensation circuit is configured to inject current substantially equal in magnitude to the leakage current into one or more junctions of the amplifier circuit to compensate for lost referenced current due to leakage. As a result, the amplifier circuit and various devices can realize the flow of the reference current as substantially intended without detrimental effects of leakage current, thus maintaining the integrity of the referenced current. The leakage compensation circuit comprises an array of compensation regions configured to approximate the collective loss that is created by the leakage elements and provide a compensation current substantially equal in magnitude to one or more junctions to compensate for lost referenced current.
摘要翻译：提供一种泄漏补偿电路和技术，其补偿由于泄漏元件引起的放大器电路的参考电流中的损耗。泄漏补偿电路被配置为将大小相等于泄漏电流的电流注入放大器电路的一个或多个结，以补偿由于泄漏引起的丢失的参考电流。结果，放大器电路和各种器件可以实现基本上预期的参考电流的流动，而不会有泄漏电流的有害影响，从而保持参考电流的完整性。泄漏补偿电路包括补偿区域的阵列，其被配置为近似由泄漏元件产生的共同损耗，并提供与一个或多个结点基本相等的补偿电流，以补偿丢失的参考电流。

44. 发明授权

US06639446B2 High linearity, high gain mixer circuit 失效
公开(公告)号：US06639446B2
公开(公告)日：2003-10-28
申请号：US10193300
申请日：2002-07-12
申请人： Hiroshi Komurasaki , Hisayasu Sato , Kimio Ueda
发明人： Hiroshi Komurasaki , Hisayasu Sato , Kimio Ueda
IPC分类号： G06G712
CPC分类号： H03D7/125
摘要： A mixer circuit includes a first signal input terminal connected to the gate of a first MOSFET, and a second signal input terminal connected to the gate of a second MOSFET. The mixer circuit is configured such that a relationship (VG1−VGS2)

45. 发明授权

US06614295B2 Feedback-type amplifier circuit and driver circuit 有权
公开(公告)号：US06614295B2
公开(公告)日：2003-09-02
申请号：US10028779
申请日：2001-12-28
申请人： Hiroshi Tsuchi
发明人： Hiroshi Tsuchi
IPC分类号： G06G712
CPC分类号： H03F3/505
摘要： Disclosed is a feedback-type amplifier circuit including feedback-type charging means, which operates as a voltage follower, having a differential stage which receives an input-terminal voltage and an output-terminal voltage differentially as inputs and charging means for performing a charging operation at the output terminal based upon an output from the differential stage; and follower-type discharging means for performing a discharging operation at the output terminal by follower operation of an active element in accordance with a voltage difference between the input-terminal voltage and the output-terminal voltage.

46. 发明授权

US06600363B2 Folded floating-gate differential pair amplifier 失效
公开(公告)号：US06600363B2
公开(公告)日：2003-07-29
申请号：US10116848
申请日：2002-04-05
申请人： Bradley A. Minch
发明人： Bradley A. Minch
IPC分类号： G06G712
CPC分类号： H03F3/45192 , H03F2203/45341 , H03F2203/45352
摘要： A floating-gate MOS differential pair amplifier has a regulating feedback voltage whose swing is folded up into the same range over which the input and output voltages swing. In one embodiment, output currents are mirror copies of differential pair currents whose sum is regulated. In a further embodiment, feedback that regulates the sum of the currents is provided to an extra control gate connected to the floating gates. The control gate comprises a capacitive voltage divider in one embodiment that is coupled to gates in the differential pair and in the current mirror.

47. 发明授权

US06545522B2 Apparatus and method to provide a single reference component for multiple circuit compensation using digital impedance code shifting 失效
公开(公告)号：US06545522B2
公开(公告)日：2003-04-08
申请号：US09861158
申请日：2001-05-17
申请人： Usman A. Mughal , Razi Uddin , Chee How Lim , Steven A. Peterson
发明人： Usman A. Mughal , Razi Uddin , Chee How Lim , Steven A. Peterson
IPC分类号： G06G712
CPC分类号： H04L25/0298 , H03K19/00384 , H04L25/026 , H04L25/0272
摘要： A single external impedance element is used to perform multiple circuit compensation. A reference impedance code is first generated based on matching an internal impedance generated by transistors with an impedance of the external impedance element, and then the reference impedance code can be shifted to generate new impedance codes according to impedance requirements of various different circuits that require compensation. Use of the single external impedance element for compensation of multiple circuits reduces motherboard and packaging costs. Chip area is also conserved since simpler compensation circuits can be used.

48. 发明授权

US06538500B2 Power efficient line driver with 4X supply voltage swing and active termination 有权
标题翻译：高效的线路驱动器，具有4X电源电压摆幅和主动端接
公开(公告)号：US06538500B2
公开(公告)日：2003-03-25
申请号：US09938776
申请日：2001-08-24
申请人： Kambiz Hayat-Dawoodi , Anil Kumar , Fernando D. Carvajal
发明人： Kambiz Hayat-Dawoodi , Anil Kumar , Fernando D. Carvajal
IPC分类号： G06G712
CPC分类号： H04L25/0266
摘要： A differential line driver with 4X supply voltage swing with a 1:1 transformer, which enhances the loop length for applications such as digital subscriber line includes: a differential circuit having first and second input nodes, first and second output nodes 52 and 54, and a supply voltage node; a transformer 22 having a first coil coupled between the first and second output nodes; and a center tap 50 of the first coil coupled to the supply voltage node. The device also acts as an active impedance termination, which eliminates the series termination resistor in conventional hybrids and thereby saving 6 dB transmit power.
摘要翻译：具有4倍电源电压摆幅的差分线路驱动器，具有1：1变压器，这增强了数字用户线路等应用的环路长度，包括：具有第一和第二输入节点的差分电路，第一和第二输出节点52和54，以及电源电压节点; 变压器22，具有耦合在第一和第二输出节点之间的第一线圈; 以及耦合到电源电压节点的第一线圈的中心抽头50。该器件还充当有源阻抗端接，消除了常规混合电路中的串联终端电阻，从而节省了6 dB的发射功率。

49. 发明授权

US06525602B1 Input stage for a buffer with negative feed-back 有权
标题翻译：具有负反馈的缓冲器的输入级
公开(公告)号：US06525602B1
公开(公告)日：2003-02-25
申请号：US09684929
申请日：2000-10-06
申请人： Luciano Tomasini , Jesus Guinea
发明人： Luciano Tomasini , Jesus Guinea
IPC分类号： G06G712
CPC分类号： H03F3/3028 , H03F3/3023
摘要： An amplifier stage for a buffer with negative feedback includes an input stage having an input terminal, an output terminal, a first and a second supply terminal, a biasing branch, a first and a second balancing branch each comprising an active transistor for supplying, at the output terminal, a current depending on the current difference in the first and second balancing branches. The biasing branch and the first and second balancing branches are connected in parallel between the first and second supply terminals. The input terminal divides the biasing branch into two input branches having a constant-current generator. Each active transistor is connected to a corresponding current generator for receiving a control voltage correlated with a voltage at the terminals of the current generator.
摘要翻译：用于具有负反馈的缓冲器的放大器级包括具有输入端子，输出端子，第一和第二电源端子的输入级，偏置支路，第一和第二平衡支路，每个支路包括有源晶体管，用于在输出端子，取决于第一和第二平衡分支中的电流差的电流。偏置支路和第一和第二平衡支路并联连接在第一和第二供电端子之间。输入端子将偏置支路分为具有恒定电流发生器的两个输入支路。每个有源晶体管连接到相应的电流发生器，用于接收与电流发生器的端子处的电压相关的控制电压。

50. 发明授权

US06525601B2 Input system for variable gain amplifier having transconductance stages with feedforward paths diverted to AC ground 有权
公开(公告)号：US06525601B2
公开(公告)日：2003-02-25
申请号：US10170067
申请日：2002-06-11
申请人： Barrie Gilbert
发明人： Barrie Gilbert
IPC分类号： G06G712
CPC分类号： G01R19/02 , G05F3/222 , G05F3/265 , H03G1/0088
摘要： An input system for a variable gain amplifier using a continuously interpolated attenuator includes a plurality of gm stages in which the collector current from one transistor in each gm stage is diverted to AC ground, thereby eliminating a feedforward path and providing flat frequency response at very high frequencies. An additional feedforward path through the parasitic emitter capacitances in each gm stage is eliminated by a filter capacitor coupled the common emitter node of each gm stage. A compensation transistor included in each gm stage provides a differential output signal which can be used to cancel common mode feedforward signals which are coupled to the output through the collector-junction capacitances of the gm stages. The effects of parasitic capacitances are further reduced by reverse biasing the gm stages that are off.

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