公开(公告)号：US06853272B1

公开(公告)日：2005-02-08

申请号：US10295221

申请日：2002-11-15

Applicant: Rodney Alan Hughes

Inventor： Rodney Alan Hughes

IPC: H01P1/15 ,  H03B1/00 ,  H03J3/18 ,  H03J3/20 ,  H03J5/12

CPC classification number: H03J3/20 ,  H01P1/15 ,  H03B2201/025 ,  H03J3/185 ,  H03J2200/10 ,  H03J2200/38

Abstract: A linear voltage controlled capacitance circuit is provided that includes a plurality of MOS varactor pairs. Each MOS varactor pair is operable to receive a first tuning voltage, a second tuning voltage, and a bias voltage unique to the MOS varactor pair. The capacitance circuit is operable to generate a positive tank node signal and a negative tank node signal based on the first and second tuning voltages and the bias voltages. A means to control voltage-to-capacitance gain is also provided to compensate for coarse tuning capacitance change.

Abstract translation: 提供了包括多个MOS变容二极管对的线性压控电容电路。 每个MOS变容二极管对可操作以接收第一调谐电压，第二调谐电压和MOS变容二极管对独有的偏置电压。 电容电路可操作以基于第一和第二调谐电压和偏置电压产生正的储罐结点信号和负罐结点信号。 还提供了一种控制电压 - 电容增益的手段来补偿粗调谐电容变化。

公开(公告)号：US20040053595A1

公开(公告)日：2004-03-18

申请号：US10372922

申请日：2003-02-26

Inventor： Jiro Shinbo ,  Hirotaka Oosawa ,  Noriyuki Kurakami ,  Masumi Kasahara ,  Robert Astle Henshaw

IPC: H04B001/26 ,  H04B007/00 ,  H04B015/00

CPC classification number: H03L7/10 ,  H03B5/1215 ,  H03B5/1228 ,  H03B5/1243 ,  H03B5/1265 ,  H03B2201/025 ,  H03D3/008 ,  H03J1/005 ,  H03J2200/10 ,  H03L7/0891 ,  H03L7/099 ,  H03L7/193

Abstract: A communication semiconductor integrated circuit has an oscillator circuit forming part of a transmission PLL circuit fabricated on a single semiconductor chip together with an oscillator circuit forming part of a reception PLL circuit and an oscillator circuit for an intermediate frequency. The oscillator circuit for the transmission PLL circuit is configured to be operable in a plurality of bands. The communication semiconductor integrated circuit also comprises a circuit for measuring the oscillating frequency of the oscillator circuit for the transmission PLL circuit, and a storage circuit for storing the result of measurement made by the measuring circuit. A band to be used by the oscillator circuit for the transmission PLL circuit is determined based on values for setting the oscillating frequencies of the oscillator circuit forming part of the reception PLL circuit and the intermediate frequency oscillator circuit, and the result of measurement stored in the storage circuit.

Abstract translation: 通信半导体集成电路具有形成在单个半导体芯片上的传输PLL电路的一部分的振荡器电路以及形成接收PLL电路的一部分的振荡器电路和用于中频的振荡器电路。 用于传输PLL电路的振荡器电路被配置为可在多个频带中操作。 通信半导体集成电路还包括用于测量用于传输PLL电路的振荡器电路的振荡频率的电路和用于存储由测量电路进行的测量结果的存储电路。 用于传输PLL电路的振荡电路使用的频带基于用于设置构成接收PLL电路和中频振荡器电路的一部分的振荡电路的振荡频率的值和存储在传输PLL电路中的测量结果的值来确定 存储电路。

公开(公告)号：US20030206070A1

公开(公告)日：2003-11-06

申请号：US10138027

申请日：2002-05-03

Inventor： David M. Pietruszynski ,  Douglas R. Frey

IPC: H03B005/32

CPC classification number: H03K3/0307 ,  H03B5/32 ,  H03B2201/025 ,  H03J2200/10 ,  H03L7/099

Abstract: A method of tuning a DCXO includes the step of providing a coarse tuning array and a fine tuning array of capacitors fabricated on the same integrated circuit die. The coarse array is adjusted until the difference between a desired frequency and the output frequency corresponds to a change in capacitance no greater than half the range of the fine tuning array. In one embodiment, the fine tuning array is adjusted to mid-range before adjusting the coarse tuning array. A DCXO apparatus includes at least one integrated circuit segmented switched capacitor network providing a capacitance that is a nonmonotonic function of a composite input code. The segmented switched capacitor network includes parallel coupled binary weighted and thermometer coded switched capacitor networks for coarse and fine tuning, respectively.

Abstract translation: 调谐DCXO的方法包括提供在同一集成电路管芯上制造的粗调谐阵列和电容器的微调阵列的步骤。 调整粗阵列，直到期望频率和输出频率之间的差值对应于不大于微调阵列范围的一半的电容变化。 在一个实施例中，在调整粗调谐阵列之前，将微调阵列调整到中等范围。 DCXO装置包括至少一个集成电路分段的开关电容器网络，其提供作为复合输入代码的非单调功能的电容。 分段开关电容网络分别包括用于粗调和微调的并联耦合二进制加权和温度计编码的开关电容器网络。

公开(公告)号：US06639479B2

公开(公告)日：2003-10-28

申请号：US10052856

申请日：2002-01-18

Applicant: Mike Kappes ,  Terje Gloerstad

Inventor： Mike Kappes ,  Terje Gloerstad

IPC: H03B520

CPC classification number: H03L7/00 ,  H03B2201/0208 ,  H03B2201/025 ,  H03K3/0231

Abstract: An integrated oscillator that may be used as a time clock includes circuitry that oscillates about an RC time constant, which RC time constant is adjustable to provide a desired frequency of oscillation. More specifically, the oscillator includes a capacitor array that has a plurality of capacitors coupled in parallel wherein each capacitor may be selectively included into the RC time constant or selectively excluded there from. Rather than setting the capacitance values to a desired capacitance value, a system for adjusting the time constant includes circuitry for measuring an output frequency and for comparing that to a certified frequency source wherein the time constant is adjusted by adding or removing capacitors from the capacitor array until the frequency of the internal clock matches an expected frequency.

Abstract translation: 可用作时钟的集成振荡器包括围绕RC时间常数振荡的电路，RC时间常数可调，以提供期望的振荡频率。 更具体地说，振荡器包括电容器阵列，其具有并联耦合的多个电容器，其中每个电容器可被选择性地包括在RC时间常数中或者选择性地被包括在其中。 不是将电容值设置为期望的电容值，而是用于调整时间常数的系统包括用于测量输出频率并将其与经认证的频率源进行比较的电路，其中通过从电容器阵列中添加或去除电容器来调整时间常数 直到内部时钟的频率与预期频率相匹配。

公开(公告)号：US20020171500A1

公开(公告)日：2002-11-21

申请号：US10134897

申请日：2002-04-29

Inventor： Eiichi Hasegawa ,  Kazuhisa Oyama

IPC: H03B001/00

CPC classification number: H03B5/06 ,  H03B2201/0208 ,  H03B2201/025

Abstract: To provide a voltage controlled oscillator having a large variable width of oscillation frequency while ensuring oscillation starting performance, a P-channel MOS transistor Tr is made ON by detecting that an oscillation signal is provided with a predetermined amplitude value and oscillating operation is shifted from an initial state to a steady state by a detecting circuit OPC and a capacitor CA is connected in series with a series circuit constituted by a crystal resonator XL and a varicap diode CV. In the initial state, a load capacitance is reduced to thereby cancel an amount of reducing conductance gm of an oscillation amplifying portion to correspond to operation of the crystal resonator by a low amplitude and negative resistance necessary for maintaining excellent oscillation starting performance is provided and in the steady state, a width of changing the oscillation frequency is enlarged by enhancing an effect of the varicap diode CV.

Abstract translation: 为了提供振荡频率可变宽度大的压控振荡器，同时确保振荡起动性能，通过检测到振荡信号被设置有预定的振幅值，使P沟道MOS晶体管Tr成为导通，并且振荡操作从 由检测电路OPC和电容器CA的初始状态稳定状态与由晶体谐振器XL和变容二极管CV构成的串联电路串联连接。 在初始状态下，减小负载电容从而抵消振荡放大部分的电导率gm的减小量，以便与振荡放电部分的运行相对应，并且保持优异的振荡开始性能所需的低振幅和负电阻，并且在 通过增加变容二极管CV的影响，稳定状态，改变振荡频率的宽度被扩大。

公开(公告)号：US5872489A

公开(公告)日：1999-02-16

申请号：US848137

申请日：1997-04-28

Applicant: Mau Chung F. Chang ,  Henry O. Marcy, 5th ,  Deepak Mehrotra ,  Kenneth D. Pedrotti ,  David R. Pehlke ,  Charles W. Seabury ,  Jun J. Yao ,  James L. Bartlett ,  J. L. Julian Tham

Inventor： Mau Chung F. Chang ,  Henry O. Marcy, 5th ,  Deepak Mehrotra ,  Kenneth D. Pedrotti ,  David R. Pehlke ,  Charles W. Seabury ,  Jun J. Yao ,  James L. Bartlett ,  J. L. Julian Tham

IPC: B81C3/00 ,  H01H59/00 ,  H01L27/06 ,  H03B1/00 ,  H03B5/12 ,  H03F1/26 ,  H03F1/56 ,  H03B5/08 ,  H03F3/04 ,  H03J5/24

CPC classification number: H03F1/565 ,  H01L27/0611 ,  H03B5/1256 ,  H03F1/26 ,  H03F3/195 ,  H01H59/0009 ,  H03B2201/012 ,  H03B2201/0208 ,  H03B2201/0216 ,  H03B2201/025 ,  H03F2200/294 ,  H03F2200/372 ,  H03J2200/10 ,  H03J2200/15

Abstract: An integrated, tunable inductance network features a number of fixed inductors fabricated on a common substrate along with a switching network made up of a number of micro-electromechanical (MEM) switches. The switches selectably interconnect the inductors to form an inductance network having a particular inductance value, which can be set with a high degree of precision when the inductors are configured appropriately. The preferred MEM switches introduce a very small amount of resistance, and the inductance network can thus have a high Q. The MEM switches and inductors can be integrated using common processing steps, reducing parasitic capacitance problems associated with wire bonds and prior art switches, increasing reliability, and reducing the space, weight and power requirements of prior art designs. The precisely tunable high-Q inductance network has wide applicability, such as in a resonant circuit which provides a narrow bandwidth frequency response which peaks at a specific predetermined frequency, making possible a highly selective performance low noise amplifier (LNA), or in an oscillator circuit so that a precise frequency of oscillation can be generated and changed as needed.

Abstract translation: 集成的可调电感网络具有在由公共基板上制造的多个固定电感器以及由多个微机电（MEM）开关组成的开关网络。 开关可选地互连电感器以形成具有特定电感值的电感网络，当电感器被适当地配置时，可以以高精度设置电感网络。 优选的MEM开关引入非常少量的电阻，因此电感网络可以具有高Q.MEM开关和电感器可以使用常规的处理步骤进行集成，减少与引线键合和现有技术开关相关联的寄生电容问题，增加 可靠性，并减少现有技术设计的空间，重量和功率要求。 精确可调谐的高Q电感网络具有广泛的适用性，例如在谐振电路中，其提供以特定预定频率峰值的窄带宽频率响应，使高选择性性能低噪声放大器（LNA）或振荡器 使得可以根据需要产生和改变振荡的精确频率。

公开(公告)号：US5629652A

公开(公告)日：1997-05-13

申请号：US647395

申请日：1996-05-09

Applicant: Frederick G. Weiss

Inventor： Frederick G. Weiss

IPC: H03B1/00 ,  H03B5/12 ,  H03B5/18 ,  H03B27/00 ,  H03K3/282 ,  H03B5/00 ,  H03B5/20

CPC classification number: H03K3/2823 ,  H03B5/1215 ,  H03B5/1231 ,  H03B5/1243 ,  H03B5/1265 ,  H03B2200/004 ,  H03B2200/0048 ,  H03B2200/0062 ,  H03B2200/0098 ,  H03B2201/025 ,  H03B27/00 ,  H03B5/18

Abstract: Both differential and single-ended band-switchable VCOs are described. The single-ended version of the voltage controlled oscillator in its most basic form includes a load, two transistors, two delay elements, and a switchable current source. The first transistor includes a collector, an emitter and a base coupled to the load to form an output terminal for providing an oscillator output signal. The first delay element is connected between the collector and the base of the first transistor. The second transistor includes a collector, an emitter and a base connected to the base of the first transistor. The second delay element is connected between the collector of the first transistor and the collector of the second transistor. The switchable current source is connected to the emitters of the first and second transistors to provided a current to one of the transistors responsive to a control signal wherein the oscillator output signal has a first frequency of oscillation that is inversely proportional to the delay of the first transistor when the first transistor is turned on and a second frequency of oscillation inversely proportional to the sum of the first and second delay element delays when the second transistor is turned on.

Abstract translation: 描述差分和单端带可切换VCO。 其最基本形式的压控振荡器的单端版本包括负载，两个晶体管，两个延迟元件和可切换电流源。 第一晶体管包括集电极，发射极和耦合到负载的基极，以形成用于提供振荡器输出信号的输出端。 第一延迟元件连接在第一晶体管的集电极和基极之间。 第二晶体管包括集电极，发射极和连接到第一晶体管的基极的基极。 第二延迟元件连接在第一晶体管的集电极和第二晶体管的集电极之间。 可切换电流源连接到第一和第二晶体管的发射极，以响应于控制信号向一个晶体管提供电流，其中振荡器输出信号具有与第一和第二晶体管的延迟成反比的第一振荡频率 当第二晶体管导通时，第一晶体管导通，以及与第一和第二延迟元件的和的和成反比的第二振荡频率。

公开(公告)号：US3889210A

公开(公告)日：1975-06-10

申请号：US40092373

申请日：1973-09-26

Applicant: HITACHI LTD

Inventor： MATSUURA SHIGEO ,  SAITOH TAKESHI ,  MIYAMOTO HIROSHI

IPC: H03B1/00 ,  H03B5/12 ,  H04B1/26 ,  H04N5/44 ,  H03B3/02

CPC classification number: H03B5/1231 ,  H03B5/1203 ,  H03B5/1243 ,  H03B2200/004 ,  H03B2200/0048 ,  H03B2201/025 ,  H03B2201/031

Abstract: The proposed local oscillation circuit comprises a resonance circuit including a variable capacitance diode to change the resonance frequency and tuning coils for low and high frequency bands, an oscillating transistor connected with the resonance circuit, changeover means for switching the tuning coils between the low and the high frequency bands, biasing means for providing a bias voltage for the oscillating transistor, and means for changing over a collector current of the transistor by changing the bias voltage applied by the biasing means to the transistor, in response to the operation of the tuning coil change-over means. The local oscillation circuit is well adapted to be used in a tuner of a receiver which receives a wide range of frequencies, e.g. a VHF television tuner.

Abstract translation: 所提出的本地振荡电路包括谐振电路，其包括用于改变谐振频率的可变电容二极管和用于低频和高频带的调谐线圈，与谐振电路连接的振荡晶体管，用于将调谐线圈切换到低频和低频之间的转换装置 高频带，用于为振荡晶体管提供偏置电压的偏置装置，以及用于响应于调谐线圈的操作而改变由偏置装置施加到晶体管的偏置电压来改变晶体管的集电极电流的装置 转换手段 本地振荡电路非常适合用于接收宽范围频率的接收机的调谐器，例如， 甚高频电视调谐器。

公开(公告)号：US20180109246A1

公开(公告)日：2018-04-19

申请号：US15783930

申请日：2017-10-13

Applicant: Ricardo Zaplana

Inventor： Ricardo Zaplana

IPC: H03K5/1252 ,  H03K3/84 ,  H03K3/017 ,  H03K5/24 ,  H03B5/12

CPC classification number: H03K5/1252 ,  H02J5/005 ,  H02J7/025 ,  H02J50/12 ,  H02M3/33523 ,  H02M3/33569 ,  H03B5/1265 ,  H03B2200/004 ,  H03B2201/025 ,  H03K3/017 ,  H03K3/84 ,  H04B5/0075 ,  Y02B70/1433

Abstract: It is often desirable to transmit data between circuits or components operating at a relatively high voltage and circuits operating at a relatively low voltage. Such a task can be performed by use of an isolator. Some isolator designs use magnetic coupling to transfer the data as this is more robust against inadvertently transmitting high voltage transients than capacitor based isolators. However it is often desirable to encode the data for exchange across the transformer of the isolator and decode after transmission across the transformer. This requires power for the encoding and decoding circuits. To ensure both sides are powered, power may be transferred by another transformer. The transformer primary is driven by an oscillating signal. The system disclosed in some embodiments herein varies the frequency of the oscillating signal to mitigate the risk of it interfering with other circuits or systems associated with the isolator.

公开(公告)号：US20180097521A1

公开(公告)日：2018-04-05

申请号：US15676080

申请日：2017-08-14

Applicant: Apple Inc.

Inventor： Joachim S. Hammerschmidt ,  Robert G. Lorenz

IPC: H03L7/089 ,  H03C3/09 ,  H03L7/099 ,  H03L7/10 ,  H03L7/18

CPC classification number: H03L7/0893 ,  H03B5/1243 ,  H03B5/1265 ,  H03B2201/025 ,  H03B2201/0266 ,  H03C3/0925 ,  H03C3/0933 ,  H03C3/095 ,  H03C3/0958 ,  H03C3/0991 ,  H03J2200/10 ,  H03L7/0805 ,  H03L7/0996 ,  H03L7/104 ,  H03L7/105 ,  H03L7/18 ,  H03L7/189 ,  H03L2207/06

Abstract: A method and apparatus for performing a two-point calibration of a VCO in a PLL is disclosed. The method includes determining a first steady state tuning voltage of the VCO with no modulation voltage applied. Thereafter, an iterative process may be performed wherein a modulation voltage is applied to the VCO (along with the tuning voltage) and a modified divisor is applied to the divider circuit in the feedback loop. During each iteration, after the PLL is settled, the tuning voltage is measured and a difference between the current value and the first value is determined. If the current and first values of the turning voltage are not equal, another iteration may be performed, modifying at least one of the modulation voltage and the divisor, and determining the difference between the current and first values of the tuning voltage.