公开(公告)号：US20180034413A1

公开(公告)日：2018-02-01

申请号：US15660022

申请日：2017-07-26

申请人： Siemens Aktiengesellschaft

发明人： Florian Kirsammer ,  Hans-Guenther KLEIH ,  Michael LUDWIG ,  Guenter MARCAUX

IPC分类号： H03D3/24 ,  H03D3/00 ,  H04L27/38 ,  H04L27/227

CPC分类号： H03D3/24 ,  G01D3/028 ,  H03D3/005 ,  H03D3/007 ,  H04L27/2273 ,  H04L27/3809 ,  H04L2027/0057

摘要： A measuring device in which a non-electrical variable is converted into an electrical measurement signal via an electrical alternating current having a frequency, wherein the measurement signal contains a signal portion dependent on the non-electrical variable and is double the frequency, and a fault signal portion dependent on the alternating current and is at the frequency, where the measurement signal is pre-processed and digitized to generate a digital signal that is detected and processed to generate a measured value proportional to the non-electrical variable and to generate a fault signal value, wherein the fault signal value is utilized to normalize the measured value that is normalized in a normalizing stage, by forming the quotient using the square of the fault signal value, and is output as a normalized measured value.

公开(公告)号：US20170149438A1

公开(公告)日：2017-05-25

申请号：US15425597

申请日：2017-02-06

申请人： City University of Hong Kong

发明人： Quan Xue ,  Haifeng Zhou ,  Kam Man Shum

IPC分类号： H03L7/099 ,  H01L49/02 ,  H03B19/14 ,  H01L21/768 ,  H01L29/66 ,  H01L21/8234 ,  H01L27/06

CPC分类号： H03L7/099 ,  H01L21/768 ,  H01L21/76895 ,  H01L21/823475 ,  H01L23/645 ,  H01L27/0207 ,  H01L27/0641 ,  H01L27/088 ,  H01L28/10 ,  H01L29/0696 ,  H01L29/4238 ,  H01L29/78 ,  H03B5/1212 ,  H03B5/1228 ,  H03B19/14 ,  H03D3/24

摘要： Transistors can be used for a variety of electronic-based applications. Therefore, transistor efficiency and performance is of importance. An apparatus is presented herein to increase the locking range of transistors by leveraging cross-coupled injection transistors in conjunction with symmetry injection transistors. The transistor efficiency can also be increase by reducing a parasitic capacitance associated with the components of the transistor.

公开(公告)号：US08380140B2

公开(公告)日：2013-02-19

申请号：US13121063

申请日：2008-09-26

申请人： Hitoshi Utagawa ,  Toshiaki Matsui

发明人： Hitoshi Utagawa ,  Toshiaki Matsui

IPC分类号： H04B1/40 ,  H03B7/00

CPC分类号： H03C3/227 ,  H03C2200/0033 ,  H03D3/24

摘要： A baseband signal processing unit changes the collector current of a transistor (20) formed by a bias control circuit (7) in accordance with a baseband transmission signal input from a baseband signal input terminal (18), changing the drain bias of a high-frequency transistor (1) to realize frequency modulation by changing the oscillation frequency, and the radiation wave thereof forms a transmit RF signal, whereby the transmission operation is performed. On the other hand, the oscillation signal is synchronized with a frequency modulated RF signal that arrives from outside, the change in frequency caused by the frequency modulation is generated as a change in the drain bias of the high-frequency transistor (1), and reception operation is performed by taking out that change as a voltage amplitude change from the baseband signal output terminal (14). As a result, it is possible to provide a microwave/millimeter wave communication apparatus that is simple in structure, low cost, and low power consumption.

摘要翻译： 基带信号处理单元根据从基带信号输入端子（18）输入的基带发送信号，改变由偏置控制电路（7）形成的晶体管（20）的集电极电流， 频率晶体管（1）通过改变振荡频率来实现频率调制，并且其辐射波形成发射RF信号，从而进行发射操作。 另一方面，振荡信号与从外部到达的频率调制RF信号同步，由频率调制引起的频率变化作为高频晶体管（1）的漏极偏置的变化产生， 通过从基带信号输出端子（14）取出作为电压振幅变化的变化来进行接收动作。 结果，可以提供结构简单，成本低，功耗低的微波/毫米波通信装置。

公开(公告)号：US07443930B2

公开(公告)日：2008-10-28

申请号：US10999531

申请日：2004-11-30

申请人： Henrik T. Jensen

发明人： Henrik T. Jensen

IPC分类号： H03D3/18 ,  H03D3/24

CPC分类号： H03D3/24 ,  H03D2200/0082

摘要： A complex digital phase locked loop for use in a digital demodulator includes a phase detector for producing a phase error indicative of a difference in phase between a complex digital input signal and a complex digital feedback signal. The phase error is input to a controller, which multiplies the phase error by a gain factor selected to stabilize and optimize the phase locked loop and produces an output signal for use in extracting a frequency deviation present in the complex digital input signal. The output signal is also input to a numerically controlled oscillator that tracks the phase of the complex digital input signal based on the output signal and produces the complex digital feedback signal.

摘要翻译： 用于数字解调器的复数数字锁相环包括相位检测器，用于产生指示复数数字输入信号和复数数字反馈信号之间的相位差的相位误差。 将相位误差输入到控制器，该控制器将相位误差乘以所选择的增益因子，以稳定和优化锁相环，并产生用于提取复数字输入信号中存在的频率偏差的输出信号。 输出信号也输入到数控振荡器，该振荡器基于输出信号跟踪复数数字输入信号的相位，并产生复数数字反馈信号。

公开(公告)号：US5625319A

公开(公告)日：1997-04-29

申请号：US550677

申请日：1995-10-31

申请人： Kazuya Miki

发明人： Kazuya Miki

IPC分类号： H04N5/455 ,  H03D3/02 ,  H03D3/24 ,  H03L7/093 ,  H04B1/10 ,  H04N7/20 ,  H03D3/00

CPC分类号： H03D3/24 ,  H03D3/241

摘要： An FM demodulator demodulating an FM modulated input signal through a PLL circuit, which includes a phase comparator a loop filter, a DC amplifier, a BB amplifier, and a VCO, and outputting the demodulated signal further includes a feedback circuit connected in parallel to DC amplifier and having a resistance which is a function of an external control voltage. The feedback circuit may be connected in parallel to both DC amplifier and BB amplifier. A PIN diode is typically used as a resistance variable element in the feedback circuit.

摘要翻译： 通过PLL电路解调FM调制输入信号的FM解调器，其包括相位比较器环路滤波器，DC放大器，BB放大器和VCO，并且输出解调信号还包括并联连接到DC的反馈电路 并且具有作为外部控制电压的函数的电阻。 反馈电路可以与DC放大器和BB放大器并联连接。 PIN二极管通常用作反馈电路中的电阻可变元件。

公开(公告)号：US3997848A

公开(公告)日：1976-12-14

申请号：US635531

申请日：1975-11-26

申请人： Ronnie R. Rippy

发明人： Ronnie R. Rippy

IPC分类号： H03D3/24 ,  H04L27/00 ,  H04L27/227 ,  H03C3/22 ,  H03D3/20

CPC分类号： H03D3/24 ,  H04L27/2273 ,  H04L2027/0044 ,  H04L2027/0051 ,  H04L2027/0067

摘要： A phase modulated wave that may have no carrier power is demodulated by a phase locked loop including a phase detector for deriving an A.C. data output signal having a magnitude and a phase indicative of the phase of the modulated wave. A feedback loop responsive to the data output signal restores power to the carrier frequency component to the loop. In one embodiment, the feedback loop includes a phase modulator responsive to the phase modulated wave and the data output signal. In a second embodiment, carrier frequency power is restored by differentiating the data output signal and supplying the differentiated signal to an input of a voltage controlled oscillator included in the phase locked loop. Preferably, the phase modulator is linear and includes a series inductance-capacitance network, wherein the capacitor is a voltage controlled varactor. To compensate for nonlinearities in the varactor reactance vs. voltage characteristic, the series circuit is shunted by a properly selected inductance.

摘要翻译： 可以不具有载波功率的相位调制波由包括相位检测器的锁相环解调，该相位检测器用于导出具有表示调制波的相位的幅度和相位的交点数据输出信号。 响应于数据输出信号的反馈回路恢复到载波频率分量到环路的功率。 在一个实施例中，反馈回路包括响应于相位调制波和数据输出信号的相位调制器。 在第二实施例中，通过差分数据输出信号并将微分信号提供给包括在锁相环中的压控振荡器的输入来恢复载波频率功率。 优选地，相位调制器是线性的并且包括串联的电感 - 电容网络，其中电容器是电压控制的变容二极管。 为了补偿变容二极管电抗与电压特性的非线性，串联电路由适当选择的电感分流。

公开(公告)号：US3876939A

公开(公告)日：1975-04-08

申请号：US42765873

申请日：1973-12-26

申请人： TEXTRON INC

发明人： LERNER THEODORE

IPC分类号： H04B1/10 ,  H03D3/00 ,  H03D3/02 ,  H03D3/24 ,  H04B1/62

CPC分类号： H03D3/241 ,  H03D3/24

摘要： A narrow band FM system for voice communications demodulates the incoming frequency modulated carrier signal in such fashion that the bandwidth of the demodulating loop decreases as a function of a carrier signal strength. Preceding the demodulator loop is a limiter device which provides a constant power output so that as the signal-to-noise ratio decreases, the carrier signal power output likewise decreases and extends the threshold of the demodulator circuit. The demodulated output signal is modified as to its frequency spectrum to flatten the frequency spectrum of the noise signal output. In the transmitter, the voice signals are modified by a preemphasis circuit which tends to flatten the frequency spectrum of the voice signal prior to modulation and the deemphasis of modifying circuit in the receiver following the demodulator to flatten the frequency spectrum of the noise signal output substantially restores the frequency spectrum of the voice signal. The demodulator is a phase lock loop of linear negative feedback from including a multiplying circuit having the incoming signal and the demodulating signal as inputs thereto and supplying the input to the loop filter amplifier. The dc open loop gain and the transfer function of the loop filter amplifier are chosen to provide the proper frequency response for the loop and to provide an error response below a predetermined frequency which allows a reasonable modulation indice for the frequencies of interest.

公开(公告)号：US3611195A

公开(公告)日：1971-10-05

申请号：US3611195D

申请日：1969-09-03

申请人： HUGHES AIRCRAFT CO

发明人： PARHAM O D ,  CO HUGHES AIRCRAFT

IPC分类号： H03C3/14 ,  H03C3/16 ,  H03D3/24 ,  H03C3/08

CPC分类号： H03D3/241 ,  H03C3/145 ,  H03C3/16 ,  H03C2200/0008 ,  H03D3/24 ,  H03D2200/0021

摘要： The basic variable frequency oscillator circuit includes a transistor connected in a Colpitts configuration. An effective tank circuit capacitance is varied in accordance with a control signal to vary the circuit oscillation frequency. When the effective capacitance is provided by the transistor base-emitter capacitance, the frequency variation may be achieved by varying the transistor emitter current or the collector-base voltage. Alternatively, the effective capacitance may be varied by varying the transconductance of a second transistor coupled in a feedback arrangement with the Colpitts transistor. Frequency modulation may be achieved when a modulating voltage is used as the control signal. Circuit variations involving phase locking of the feedback employing embodiment onto an input signal include a frequency demodulator, a phase modulator and an amplitude modulation limiter. Further variations include a harmonic signal generator and frequency multiplier/divider circuits.

摘要翻译： 公开了一种锁相频率调制解调器电路，其包括以Colpitts配置连接的晶体管。 根据表示频率调制输入信号与电路的瞬时振荡频率的信号之间的频率差的误差信号，有效的振荡电路电容变化，以相应地改变瞬时振荡频率，从而使电路相位锁定 输入信号的载波频率，并产生指示对输入信号进行频率调制的幅度变化信号。

公开(公告)号：US2922119A

公开(公告)日：1960-01-19

申请号：US42387254

申请日：1954-04-19

申请人： ZENITH RADIO CORP

发明人： ROBERT ADLER

IPC分类号： H03B19/12 ,  H03D3/24

CPC分类号： H03D3/24 ,  H03B19/12

公开(公告)号：US2554391A

公开(公告)日：1951-05-22

申请号：US10288249

申请日：1949-07-02

申请人： PHILCO CORP

发明人： TELLIER JOSEPH C ,  ALTER ALBERT R

IPC分类号： H03D3/24 ,  H03L7/08

CPC分类号： H03D3/24 ,  H03D3/241 ,  H03L7/08