公开(公告)号：EP3105545A2

公开(公告)日：2016-12-21

申请号：EP15708335.3

申请日：2015-02-06

申请人： Murata Manufacturing Co., Ltd.

发明人： AALTONEN, Lasse

IPC分类号： G01C19/5776 ,  H03B5/00

CPC分类号： G01C19/5712 ,  G01C19/5776 ,  H03B5/06 ,  H03B5/364

摘要： A drive circuit for a MEMS resonator can include closed loop means for detecting and amplifying a signal of the MEMS resonator, and means for feeding the detected and amplified signal as a feedback signal back to the MEMS resonator. The circuitry also comprises DC bias voltage means for generating for the MEMS resonator a first DC bias voltage, and a second DC bias voltage that is controlled according to measured amplitudes of the MEMS resonator, one of the DC bias voltages being summed into the feedback signal. The circuitry comprises also a start-up circuitry adapted to detect a start-up state, and in response to a detected start-up state change at last one of the DC bias voltages to a predefined level. The state of constant oscillation is achieved reliably and in short time.

公开(公告)号：EP2873152A1

公开(公告)日：2015-05-20

申请号：EP13820321.1

申请日：2013-07-08

申请人： Nanowave Technologies Inc.

发明人： NICHOLLS, Charles , William, Tremlett ,  HAMDANE, Walid

IPC分类号： H03B5/00 ,  H03L7/24

CPC分类号： H03L7/20 ,  H03L7/185 ,  H03L2207/12

摘要： An apparatus and method for providing an output signal. The apparatus comprises an input for receiving a reference signal, an oscillator for providing an output signal, and an offset signal generator for frequency multiplying the reference signal to generate an offset signal that has a plurality of frequency products in a plurality of frequency bands. The apparatus further includes a mixer for mixing the offset signal with the output signal to produce a combined signal, an offset frequency selector for controllably selecting a frequency band of the offset signal, and a difference detector for detecting a difference between the reference signal and the combined signal and for providing a control signal to the oscillator based on the detected difference.

公开(公告)号：EP2434638A1

公开(公告)日：2012-03-28

申请号：EP11180950.5

申请日：2011-09-12

申请人： Magajna, Patrick

发明人： Magajna, Patrick

IPC分类号： H03B5/00

CPC分类号： H03B27/00 ,  H03B5/00 ,  H03B5/1847

摘要： L'invention concerne un oscillateur réglable en fréquence, dans les domaines radiofréquence et micro-onde, qui est constitué par l'association de deux systèmes bouclés, fonctionnant à la même fréquence mais dont les signaux sont déphasés d'un angle de 90°. Chaque système bouclé comporte un dispositif de déphasage, un élément actif apportant le gain nécessaire aux oscillations et un résonateur possédant une caractéristique phase-fréquence fixe, qui permet la détermination de la fréquence d'oscillation. Le déphasage dans chaque boucle étant impérativement un multiple entier de 2pi, le déphasage ajouté dans chaque boucle par le dispositif de déphasage, implique que chaque résonateur doit introduire un déphasage complémentaire afin de répondre au critère d'oscillation. Ce déphasage complémentaire se produit à une fréquence définie par la caractéristique du résonateur, celui-ci défini alors la fréquence d'oscillation. Le réglage de la fréquence s'effectue par deux cellules de déphasage, qui opèrent la multiplication analogique des signaux issus des deux systèmes bouclés par des tensions de commande et la sommation de ces produits, afin d'obtenir deux signaux déphasés:
cos(ωt)*cos(a)+sin(ωt)*(-sin(a))= cos(ωt+a) et
sin(ωt)*cos(a)+cos(ωt)*sin(a)= sin(ωt+a),
Ce système délivre donc deux signaux en quadratures et a pour caractéristique de permettre une variation de fréquence sur une large bande.
L'invention peut être mise en oeuvre dans le domaine du radar, des télécommunications, ou des sources de mesure.

摘要翻译： 振荡器（500）具有包括主相移装置（506）的环路系统（502），主相移装置（506）具有主相移单元（306），用于以可调相移值对相位移相控制信号。 每个单元格定义了相移水平。 调整单元通过对正交控制信号进行乘法和求和来调整每个单元实现的相移，其中正交控制信号之一是主信号，另一个正交控制信号是环路系统的每个单元的辅助信号。

公开(公告)号：EP1362411B1

公开(公告)日：2007-04-11

申请号：EP01944042.9

申请日：2001-06-20

申请人： TELEFONAKTIEBOLAGET LM ERICSSON (publ)

发明人： FREDRIKSSON, Jesper

IPC分类号： H03B5/00

CPC分类号： H03K3/2823 ,  H03B5/1212 ,  H03B5/1231 ,  H03B5/1243 ,  H03B5/24

摘要： The present invention proposes a new way of improving the phase stability and frequency selectivity of a phase shift oscillator (100). By introducing a filter-order enhancing feedback loop (124) in association with a phase shift filter (122) in the oscillator, higher-order phase shift filtering can be achieved without using inductive elements as in conventional higher-order LC phase shift filters. This is a great advantage, since a high Q-value can be obtained without limited by the relatively high internal losses of inductive elements (L).

公开(公告)号：EP1573662A1

公开(公告)日：2005-09-14

申请号：EP03782348.1

申请日：2003-12-09

申请人： Giesecke & Devrient GmbH

发明人： FINKENZELLER, Klaus ,  SCHRÖDER, Sönke

IPC分类号： G06K19/067 ,  G06K19/07 ,  G06K7/00 ,  H03J3/00 ,  H03H7/00 ,  H03B5/00 ,  G01S13/02

CPC分类号： G06K19/07779 ,  G01S13/753 ,  G06K7/10178 ,  G06K19/0726 ,  G06K19/07749 ,  G06K19/07767 ,  G06K19/07783 ,  G06K19/07784

摘要： The invention relates to a transponder (1) for contactlessly transmitting data. The inventive transponder (1) comprises an electronic circuit (2) and an antenna device and is characterized in that the antenna device has at least two oscillating circuits (3, 2 and 4, 5), which can be operated together and which are formed so that they electrically isolated from one another.

公开(公告)号：EP1020023A4

公开(公告)日：2004-03-17

申请号：EP99937695

申请日：1999-07-31

申请人： VITESSE SEMICONDUCTOR CORP

发明人： CAI YIJUN

IPC分类号： H03B5/00 ,  H03B5/04 ,  H03B5/12 ,  H03B5/20 ,  H03B5/24 ,  H03B28/00 ,  H03H11/18 ,  H03K3/0231

CPC分类号： H03B5/24 ,  H03B5/1209 ,  H03B5/1221 ,  H03B5/1228 ,  H03K2005/00052

摘要： A phase interpolation voltage controlled oscillator includes a plurality of n phase shifting cells (A) and n-1 levels of summing cells (S). The phase shifting cells (A) receive a common input signal and each shifts the input signal a different amount than the other phase shifting cells (A). A summing cell (S) of the first level receives and sums the outputs of at least two phase shifting cells (A), and each remaining level of summing cells receives outputs of a previous level of summing cells (S). The last level contains a single summing cell (S) which produces an output signal that is fed back as the common input signal of the phase shifting cells (A).

公开(公告)号：EP1345237A2

公开(公告)日：2003-09-17

申请号：EP03250092.8

申请日：2003-01-08

申请人： SILICON STORAGE TECHNOLOGY, INC.

发明人： Saiki, William John ,  Van Tran, Hieu ,  Khan, Sakhawat M.

IPC分类号： G11C16/30 ,  G11C5/14 ,  H02M3/07 ,  H03B5/00 ,  G05F1/46

CPC分类号： H02M3/07 ,  G11C16/30

摘要： A high voltage generator provides high voltage signals with different regulated voltage levels. A charge pump generates the high voltage, and includes a quadrature phase forward and backward Vt-canceling high-voltage self-biasing charge pump with a powerup-assist diode. A high voltage series regulator generates the high voltage supply levels, and includes slew rate enhancement and trimmable diode regulation. A nested loop regulator eliminates shunt regulation.
A high voltage generator provides high voltage signals with different regulated voltage levels. A charge pump (12) generates the high voltage (20), and includes a quadrature phase forward and backward Vt-cancelling high-voltage self-biasing charge pump with a powerup-assist diode. A high voltage series regulator (14) generates the high voltage supply levels, and includes slew rate enhancement and trimmable diode regulation. A nested loop regulator (16) eliminates shunt regulation.

摘要翻译： 高压发生器提供具有不同调节电压电平的高电压信号。 电荷泵产生高电压，并且包括具有加电辅助二极管的正交相位正向和反向Vt消除高压自偏压电荷泵。 高压串联调节器产生高电压电平，并包括压摆率增强和可调二极管调节。 嵌套回路调节器消除了分流调节。 高电压发生器提供具有不同调节电压电平的高电压信号。 电荷泵（12）产生高压（20），并且包括具有加电辅助二极管的正交相位正向和反向Vt消除高电压自偏压电荷泵。 高压串联调节器（14）产生高电压电平，并包括压摆率增强和可调整二极管调节。 嵌套回路调节器（16）消除了分流调节。

公开(公告)号：EP1314243A1

公开(公告)日：2003-05-28

申请号：EP01954522.7

申请日：2001-08-01

申请人： Jeong, Yeon Moon

发明人： Jeong, Yeon Moon

IPC分类号： H03B5/00 ,  H03B5/08 ,  H03B5/12 ,  H03B5/18

CPC分类号： H03B5/1847 ,  H03B5/1203 ,  H03B5/1231 ,  H03B5/1243

摘要： A high-frequency oscillation circuit in accordance with the present invention includes an resonance circuit for generating oscillation frequency signal; an amplifying means having an input port for receiving the signal originating from the resonance; and inductive element having one port connected to the output port of the amplifying means; an T-shape matching element or strip line; a capacitive element connected to the other port of the inductive element or the T-shape matching element or one port of the strip line; wherein the input part of the amplifying means is connected to the connection point of the inductive element or T-shape matching element and the capacitive element or T-shape matching element or strip line and the capacitor match the impedances of both sides of the amplifying means and form low pass filter so that the harmonic components included in the output of the amplifying means can be removed, and construct a resonance circuit so that the frequency selectively Q is improved and then the signal-to-noise ratio can be improved.

公开(公告)号：EP1111792A3

公开(公告)日：2002-10-09

申请号：EP00310659.8

申请日：2000-11-30

申请人： Nokia Corporation

发明人： Norskov, Soren ,  Rasmussen, Carsten ,  Hedegaard Povlsen, Neils

IPC分类号： H03L7/099 ,  H03B5/00 ,  H03L5/00

CPC分类号： H03L7/0802 ,  H03L5/00 ,  H03L7/099 ,  H03L7/18

摘要： Voltage controlled oscillator assembly, comprising at least one voltage controlled oscillator, and means for regulating the output power from the at least one voltage controlled oscillator. Preferably said means for regulating the output power is a micro-controller (16) arranged on the same chip as the voltage controlled oscillator (3). The voltage controlled oscillator assembly is typically incorporated in a phase locked loop and used in different mobile telephone constructions. The present invention ensures that the output signal of the voltage controlled oscillator has a level which is sufficient but not too powerful and which is adjusted to the actual application. Reduced losses are achieved.

公开(公告)号：EP1160967A2

公开(公告)日：2001-12-05

申请号：EP01304186.8

申请日：2001-05-09

申请人： Oki Electric Industry Company, Limited

发明人： Horikawa, Akira ,  Yoshida, Akira ,  Taya, Takashi

IPC分类号： H03B5/00

CPC分类号： H03B5/26

摘要： A tuning circuit includes an oscillator that receives an oscillating input signal and a control signal, and generates an oscillating output signal. The control signal is obtained from a frequency control circuit that compares the phases of the oscillating output signal and a reference signal. The control signal controls the transconductance of a transconductance element in the oscillator, thereby controlling the oscillator output frequency. The oscillating input signal is obtained from an amplitude control circuit that detects an amplitude limit of the oscillator output. The oscillator output amplitude is responsive to the oscillating input signal. Frequency control and amplitude control in this tuning circuit are mutually independent, so their respective control loops remain stable under all frequency and amplitude combinations.

摘要翻译： 调谐电路包括接收振荡输入信号和控制信号的振荡器，并产生振荡输出信号。 控制信号从比较振荡输出信号的相位和参考信号的频率控制电路获得。 控制信号控制振荡器中跨导元件的跨导，从而控制振荡器的输出频率。 振荡输入信号是从检测振荡器输出振幅的振幅控制电路获得的。 振荡器输出振幅响应振荡输入信号。 该调谐电路中的频率控制和幅度控制是相互独立的，因此它们各自的控制回路在所有频率和振幅组合下均保持稳定。