公开(公告)号：EP1608063A3

公开(公告)日：2006-09-13

申请号：EP05105138.1

申请日：2005-06-13

Applicant: STMicroelectronics S.r.l.

Inventor： Bietti, Ivan ,  Tonietto, Riccardo

IPC: H03K3/03

CPC classification number: H03K3/0322

Abstract: A multi-phase oscillator (135) is provided. Said multi-phase oscillator includes a plurality of resonator stages (212, 211, 210) series-connected in an ordered closed loop. Each stage is used for providing one or more oscillating voltages (ck0, ck180; ck240, ck60; ck120, ck300) corresponding to an oscillating current (Itot). The oscillating current includes a natural current (Ir) that is generated by the stage and one or more injected currents (Ica, Icb) from a previous stage in the closed loop. The oscillating voltages provided by all the stages have substantially the same frequency (Fo); on the other hand, the oscillating voltages provided by each stage and the previous oscillating voltages provided by the previous stage have a corresponding phase difference. The oscillator further includes a coupler (220, 221, 222) between each stage and the previous stage; the coupler is used for generating the injected currents according to the previous oscillating voltages. The coupler includes transconductance means (310, 320) for transforming one or more voltages corresponding to the previous oscillating voltages into one or more currents corresponding to the injected currents; the coupler further includes shifting means (610, 620) for shifting the phase of the injected currents according to the corresponding phase difference. The shifting means includes filtering means (R1, R2, C1, C2) for filtering the previous oscillating voltages into one or more corresponding filtered oscillating voltages to be supplied to the transconductance means.

公开(公告)号：EP1693965A1

公开(公告)日：2006-08-23

申请号：EP05101333.2

申请日：2005-02-22

Applicant: STMicroelectronics S.r.l.

Inventor： Tonietto, Riccardo ,  Radice, Francesco

IPC: H03K23/42 ,  H03K23/54 ,  H03L7/183 ,  H03L7/099

CPC classification number: H03L7/183 ,  H03L7/0995

Abstract: A frequency divider circuit (108) for obtaining, from a plurality of first signals (ck0,ck60,ck120,ck180,ck240,ck300) having a first frequency (Fo) and being out-of-phase to each other, at least one second signal (Vd) having a second frequency (Fd) equal to a fraction of the first frequency. The frequency divider circuit includes a delaying block (F1,F2,F3) for each first signal, the delaying blocks being series-connected in a closed loop and having a signal input (D1,*D1; D2,*D2; D3,*D3), a signal output (Q1,*Q1; Q2,*Q2; Q3,*Q3) connected to the signal input of a next delaying block in the closed loop, and a clock input (C1,*C1; C2,*C2; C3,*C3) for receiving the corresponding first signal. Each second signal is taken from the signal output of a corresponding delaying block.

Abstract translation: 一种分频器电路，用于从具有第一频率（Fo）并且彼此异相的多个第一信号（ck0，ck60，ck120，ck180，ck240，ck300）获得至少一个 第二信号（Vd）具有等于第一频率的分数的第二频率（Fd）。 分频器电路包括用于每个第一信号的延迟块（F1，F2，F3），延迟块在闭环中串联连接并具有信号输入（D1，* D1; D2，* D2; D3，* D3），连接到闭环中的下一个延迟块的信号输入的信号输出（Q1，* Q1; Q2，* Q2; Q3，* Q3）和时钟输入（C1，* C1; C2，* C2; C3，* C3），用于接收对应的第一信号。 每个第二信号取自相应延迟块的信号输出。

公开(公告)号：EP1608063A2

公开(公告)日：2005-12-21

申请号：EP05105138.1

申请日：2005-06-13

Applicant: STMicroelectronics S.r.l.

Inventor： Bietti, Ivan ,  Tonietto, Riccardo

IPC: H03K3/03

CPC classification number: H03K3/0322

Abstract: A multi-phase oscillator (135) is provided. Said multi-phase oscillator includes a plurality of resonator stages (212, 211, 210) series-connected in an ordered closed loop. Each stage is used for providing one or more oscillating voltages (ck0, ck180; ck240, ck60; ck120, ck300) corresponding to an oscillating current (Itot). The oscillating current includes a natural current (Ir) that is generated by the stage and one or more injected currents (Ica, Icb) from a previous stage in the closed loop. The oscillating voltages provided by all the stages have substantially the same frequency (Fo); on the other hand, the oscillating voltages provided by each stage and the previous oscillating voltages provided by the previous stage have a corresponding phase difference. The oscillator further includes a coupler (220, 221, 222) between each stage and the previous stage; the coupler is used for generating the injected currents according to the previous oscillating voltages. The coupler includes transconductance means (310, 320) for transforming one or more voltages corresponding to the previous oscillating voltages into one or more currents corresponding to the injected currents; the coupler further includes shifting means (610, 620) for shifting the phase of the injected currents according to the corresponding phase difference. The shifting means includes filtering means (R1, R2, C1, C2) for filtering the previous oscillating voltages into one or more corresponding filtered oscillating voltages to be supplied to the transconductance means.

Abstract translation: 提供多相位振荡器（135）。 所述多相振荡器包括以有序闭环串联连接的多个谐振器级（212,211,210）。 每个级用于提供对应于振荡电流（Itot）的一个或多个振荡电压（ck0，ck180; ck240，ck60; ck120，ck300）。 振荡电流包括由该级产生的自然电流（Ir）和来自闭环中的前一级的一个或多个注入电流（Ica，Icb）。 所有级提供的振荡电压具有基本相同的频率（Fo）; 另一方面，由各级提供的振荡电压和由前一级提供的先前振荡电压具有对应的相位差。 振荡器还包括在每个级与前一级之间的耦合器（220,221,222）; 耦合器用于根据先前的振荡电压产生注入的电流。 耦合器包括跨导装置（310,320），用于将对应于先前振荡电压的一个或多个电压变换成对应于注入电流的一个或多个电流; 耦合器还包括用于根据相应的相位差移动注入电流的相位的移位装置（610,620）。 移位装置包括滤波装置（R1，R2，C1，C2），用于将先前的振荡电压滤波成一个或多个相应的滤波后的振荡电压以提供给跨导装置。