公开(公告)号：US5805029A

公开(公告)日：1998-09-08

申请号：US861605

申请日：1997-05-22

Applicant: Ulrich Theus ,  Norbert Greitschus

Inventor： Ulrich Theus ,  Norbert Greitschus

IPC: H03B1/00 ,  H03B5/36 ,  H03L7/099

CPC classification number: H03B5/364 ,  H03B2201/0266

Abstract: The invention relates to a digitally adjustable crystal oscillator having a quartz crystal and a monolithic integrated oscillator circuit including a series combination of a first frequency-adjusting capacitor C1 and a second frequency-adjusting capacitor C2 connected in parallel with the quartz crystal and comprising parallel-connected first capacitance stages and parallel-connected second capacitance stages, respectively, and an inverter circuit connected in parallel with the quartz crystal and comprising a feedback resistor R.sub.K, the output of the innverter circuit being connected to a load resistor. The inverter circuit comprises parallel-connected inverter stages, and switching elements are provided within the inverter stages and cqapacitor stages in such a way that a respective one of the inverter stages as well as a first capacitance stage C.sub.1i and a second capacitance stage C.sub.2i are switchable into or out of circuit by means of a control signal I.sub.i.

Abstract translation: 本发明涉及具有石英晶体和单片集成振荡电路的数字可调晶体振荡器，它包括与石英晶体并联连接的第一调频电容器C1和第二调频电容器C2的串联组合， 连接的第一电容级和并联的第二电容级，以及与石英晶体并联连接并包括反馈电阻器RK的逆变器电路，该变流器电路的输出连接到负载电阻器。 逆变器电路包括并联逆变级，并且在逆变器级和cqapitor级中设置开关元件，使得各个反相器级以及第一电容级C1i和第二电容级C2i可切换 通过控制信号Ii进入或断开电路。

公开(公告)号：US20100171551A1

公开(公告)日：2010-07-08

申请号：US12628748

申请日：2009-12-01

Applicant: José Manuel Garcia González ,  Norbert Greitschus

Inventor： José Manuel Garcia González ,  Norbert Greitschus

IPC: H03F1/34

CPC classification number: H03F1/42

Abstract: An amplifier (V) for an integrated circuit amplifier circuit (IC) having a switched capacitor circuit (Cs, Cf) includes a capacitor for frequency compensation (CC1) that is connected in parallel to an amplifier stage (V2). This amplifier is advantageous because at least one second capacitor for frequency compensation (CC2) is selectively connected in parallel to the first capacitor for frequency compensation (CC1) via a switch controlled by a capacitor switching signal (clk).

Abstract translation: 具有开关电容电路（Cs，Cf）的集成电路放大电路（IC）的放大器（V）包括与放大级（V2）并联连接的用于频率补偿的电容器（CC1）。 该放大器是有利的，因为用于频率补偿的至少一个第二电容器（CC2）通过由电容器切换信号（clk）控制的开关选择性地并联连接到用于频率补偿的第一电容器（CC1）。

公开(公告)号：US07123083B2

公开(公告)日：2006-10-17

申请号：US10751670

申请日：2004-01-05

Applicant: Norbert Greitschus ,  Stefan Noe

Inventor： Norbert Greitschus ,  Stefan Noe

IPC: H03K5/00

CPC classification number: H03F3/3023 ,  H03F3/45188 ,  H03F2203/30123 ,  H03F2203/30138 ,  H03F2203/45308 ,  H03F2203/45648 ,  H03H11/126

Abstract: An at least second-order active filter circuit includes an operational amplifier (Op) whose frequency response, in conjunction with an RC network (R1, R2, C1, C2), serves to set a predetermined low-pass characteristic. The frequency response of the operational amplifier (Op) forms an integral part of this low-pass characteristic.

Abstract translation: 至少二阶有源滤波器电路包括运算放大器（Op），其运算放大器（Op），其频率响应与RC网络（R＆lt; 1＆gt;，＆lt; 2＆gt;，C＆lt; SUB > 1 C 2 2）用于设定预定的低通特性。 运算放大器（Op）的频率响应构成了该低通特性的组成部分。

公开(公告)号：US06411240B1

公开(公告)日：2002-06-25

申请号：US09479518

申请日：2000-01-07

Applicant: Norbert Greitschus

Inventor： Norbert Greitschus

IPC: H03M112

CPC classification number: H03F3/72

Abstract: An amplifier has a first amplifier stage with a first input terminal to which an input signal is applied and with an output terminal that is connected to an input terminal of a second amplifier stage located downstream. The second amplifier stage provides an output signal that is fed back to a second input terminal of the first amplifier stage through a feedback path, which preferably contains a passive network. The amplification of this combination of the first and second amplifier stages with feedback depends essentially on the parameters of the network in the feedback path. The amplifier according to the invention also has a noise source that is connected in parallel with the first amplifier stage, and is also connected to the input terminal of the second amplifier stage. The level of a signal component at the output of the second amplifier stage depends on the parameters of the network in the feedback branch and the amplification of the first amplifier stage. These values are variable and can be adjusted such that the level of the signal component provided by the noise source is independent of the amplification of the amplifier. One embodiment of the passive network comprises a voltage divider, with one tap of the voltage divider connected to the second input terminal of the first amplifier stage. A k-fold multiple of the output signal at the second amplifier stage is applied to the second input terminal of the first amplifier stage, with the feedback factor k depending on the voltage divider ratio. The amplification of the first amplifier stage may also be adjustable as a function of the feedback factor k. In one embodiment, the first amplifier stage contains a plurality of amplifiers connected in parallel that can be switched as a function of the feedback factor k. The amplifiers of the first amplifier stage are therefore preferably designed as differential amplifiers.

Abstract translation: 放大器具有第一放大器级，其具有施加输入信号的第一输入端，以及连接到位于下游的第二放大器级的输入端的输出端。 第二放大器级提供通过反馈路径反馈到第一放大器级的第二输入端的输出信号，反馈路径优选地包含无源网络。 具有反馈的第一和第二放大器级的这种组合的放大主要取决于反馈路径中网络的参数。 根据本发明的放大器还具有与第一放大器级并联连接的噪声源，并且还连接到第二放大器级的输入端子。 在第二放大器级的输出处的信号分量的电平取决于反馈支路中的网络的参数和第一放大器级的放大。 这些值是可变的并且可以被调节，使得由噪声源提供的信号分量的电平与放大器的放大无关。 无源网络的一个实施例包括分压器，其中分压器的一个抽头连接到第一放大器级的第二输入端子。 在第二放大级的输出信号的k倍数施加到第一放大级的第二输入端，反馈因数k取决于分压比。 第一放大器级的放大也可以作为反馈因子k的函数来调整。 在一个实施例中，第一放大器级包含并联连接的多个放大器，其可以作为反馈因子k的函数进行切换。 因此，第一放大器级的放大器优选地被设计为差分放大器。

公开(公告)号：US20050030092A1

公开(公告)日：2005-02-10

申请号：US10751670

申请日：2004-01-05

Applicant: Norbert Greitschus ,  Stefan Noe

Inventor： Norbert Greitschus ,  Stefan Noe

IPC: H03F3/30 ,  H03F3/45 ,  H03H11/12 ,  H03K5/00

CPC classification number: H03F3/3023 ,  H03F3/45188 ,  H03F2203/30123 ,  H03F2203/30138 ,  H03F2203/45308 ,  H03F2203/45648 ,  H03H11/126

Abstract: An at least second-order active filter circuit includes an operational amplifier (Op) whose frequency response, in conjunction with an RC network (R1, R2, C1, C2), serves to set a predetermined low-pass characteristic. The frequency response of the operational amplifier (Op) forms an integral part of this low-pass characteristic.

Abstract translation: 至少二阶有源滤波器电路包括运算放大器（Op），其运算放大器（Op）与RC网络（R1，R2，C1，C2）一起用于设定预定的低通特性。 运算放大器（Op）的频率响应构成了该低通特性的组成部分。

公开(公告)号：US6166526A

公开(公告)日：2000-12-26

申请号：US272508

申请日：1999-03-19

Applicant: Norbert Greitschus

Inventor： Norbert Greitschus

IPC: H02M3/156 ,  G05F1/10 ,  G05F1/40

CPC classification number: H02M3/156 ,  H02M2001/0025

Abstract: A DC/DC converter including a switching transistor, an inductor, a smoothing capacitor, and a switching element which are connected so as to convert an input voltage U.sub.E to an output voltage U.sub.A greater or less than the input voltage U.sub.E. The current through the inductor can be measured by providing a comparator having a first input connected to the switching transistor, and a second input connected to a reference transistor and a reference current source so as to fix the switching threshold of the comparator at the second input.

Abstract translation: 一种包括开关晶体管，电感器，平滑电容器和开关元件的DC / DC转换器，其被连接以将输入电压UE转换为大于或小于输入电压UE的输出电压UA。 可以通过提供具有连接到开关晶体管的第一输入的比较器和连接到参考晶体管和参考电流源的第二输入端来测量通过电感器的电流，以便将比较器的开关阈值固定在第二输入端 。

公开(公告)号：US07330141B2

公开(公告)日：2008-02-12

申请号：US10779317

申请日：2004-02-13

Applicant: Miodrag Temerinac ,  Norbert Greitschus

Inventor： Miodrag Temerinac ,  Norbert Greitschus

IPC: H03M1/10

CPC classification number: H03M1/1042 ,  H03M1/12

Abstract: The invention relates to a compensation circuit (1–6) to compensate nonlinear distortions of an A/D converter comprising a signal input and a compensation system. In order to avoid the high costs related to the complex analog design of the A/D converter and/or the high energy consumption in this converter and compensation system, it is proposed that a compensation circuit be used that is composed of digital circuit elements that are connected following the A/D converter and which has a nonlinearly distorted output signal of the A/D converter supplied to it to compensate the nonlinear distortion. Adaptive coefficients are preferably employed here for the compensation.

Abstract translation: 本发明涉及一种用于补偿包括信号输入和补偿系统的A / D转换器的非线性失真的补偿电路（1-6）。 为了避免与A / D转换器的复杂模拟设计相关的高成本和/或该转换器和补偿系统中的高能耗，建议使用由数字电路元件组成的补偿电路， 被连接在A / D转换器之后，并且具有提供给它的A / D转换器的非线性失真输出信号以补偿非线性失真。 这里优选采用自适应系数进行补偿。

公开(公告)号：US06680645B2

公开(公告)日：2004-01-20

申请号：US09977574

申请日：2001-10-15

Applicant: Norbert Greitschus ,  Stefan Noe

Inventor： Norbert Greitschus ,  Stefan Noe

IPC: H03K500

CPC classification number: H03H11/1278

Abstract: An at least second-order active filter circuit includes an operational amplifier (Op) whose frequency response, in conjunction with an RC network (R1, R2, C1, C2), serves to set a predetermined low-pass characteristic. The frequency response of the operational amplifier (Op) forms an integral part of this low-pass characteristic.

Abstract translation: 至少二阶有源滤波器电路包括运算放大器（Op），其运算放大器（Op）与RC网络（R1，R2，C1，C2）一起用于设定预定的低通特性。 运算放大器（Op）的频率响应构成了该低通特性的组成部分。

公开(公告)号：US06522115B1

公开(公告)日：2003-02-18

申请号：US09370271

申请日：1999-08-09

Applicant: Norbert Greitschus

Inventor： Norbert Greitschus

IPC: G05F140

CPC classification number: G05F1/613

Abstract: A pulse-width-modulated DC-DC converter provides an output signal that is feedback to an error amplifier. The converter includes a comparator for comparing the output voltage of the error amplifier with the output voltage of a compensated ramp generator and having its output coupled to a switching transistor. The compensated ramp generator is designed so that the signal proportional to the current (IDrossel) through an inductor is superimposed on the ramp voltage so as to generate an output voltage having a sawtooth waveform with a concave rise.

Abstract translation: 脉冲宽度调制DC-DC转换器提供反馈到误差放大器的输出信号。 该转换器包括比较器，用于将误差放大器的输出电压与补偿斜坡发生器的输出电压进行比较，并将其输出耦合到开关晶体管。 补偿斜坡发生器被设计成使得通过电感器与电流成比例的信号（IDrossel）被叠加在斜坡电压上，以便产生具有凹起上升的锯齿形波形的输出电压。

公开(公告)号：US08193856B2

公开(公告)日：2012-06-05

申请号：US12628748

申请日：2009-12-01

Applicant: José Manuel Garcia González ,  Norbert Greitschus

Inventor： José Manuel Garcia González ,  Norbert Greitschus

IPC: H03F1/36

CPC classification number: H03F1/42

Abstract: An amplifier (V) for an integrated circuit amplifier circuit (IC) having a switched capacitor circuit (Cs, Cf) includes a capacitor for frequency compensation (CC1) that is connected in parallel to an amplifier stage (V2). This amplifier is advantageous because at least one second capacitor for frequency compensation (CC2) is selectively connected in parallel to the first capacitor for frequency compensation (CC1) via a switch controlled by a capacitor switching signal (clk).

Abstract translation: 具有开关电容电路（Cs，Cf）的集成电路放大电路（IC）的放大器（V）包括与放大级（V2）并联连接的用于频率补偿的电容器（CC1）。 该放大器是有利的，因为用于频率补偿的至少一个第二电容器（CC2）通过由电容器切换信号（clk）控制的开关选择性地并联连接到用于频率补偿的第一电容器（CC1）。